New upstream version 1.4.0+dfsgupstream/1.4.0+dfsg

44 files changed, 4269 insertions, 1091 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 8fa6d5bdf..86b9a9fe4 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -52,9 +52,11 @@ netdata_SOURCES = \
 	proc_net_dev.c \
 	proc_net_ip_vs_stats.c \
 	proc_net_netstat.c \
+	proc_net_rpc_nfs.c \
 	proc_net_rpc_nfsd.c \
 	proc_net_snmp.c \
 	proc_net_snmp6.c \
+	proc_net_softnet_stat.c \
 	proc_net_stat_conntrack.c \
 	proc_net_stat_synproxy.c \
 	proc_stat.c \
diff --git a/src/Makefile.in b/src/Makefile.in
index 1a721a045..6645f40de 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -86,8 +86,13 @@ DIST_COMMON = $(srcdir)/Makefile.in $(srcdir)/Makefile.am \
 	$(top_srcdir)/depcomp $(dist_cache_DATA) $(dist_log_DATA) \
 	$(dist_registry_DATA) $(dist_varlib_DATA)
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
-am__aclocal_m4_deps = $(top_srcdir)/m4/ax_pthread.m4 \
-	$(top_srcdir)/configure.ac
+am__aclocal_m4_deps = $(top_srcdir)/m4/ax_c___atomic.m4 \
+	$(top_srcdir)/m4/ax_c__generic.m4 \
+	$(top_srcdir)/m4/ax_c_mallinfo.m4 \
+	$(top_srcdir)/m4/ax_c_mallopt.m4 \
+	$(top_srcdir)/m4/ax_check_compile_flag.m4 \
+	$(top_srcdir)/m4/ax_pthread.m4 $(top_srcdir)/m4/jemalloc.m4 \
+	$(top_srcdir)/m4/tcmalloc.m4 $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
 	$(ACLOCAL_M4)
 mkinstalldirs = $(install_sh) -d
@@ -113,8 +118,9 @@ am_netdata_OBJECTS = appconfig.$(OBJEXT) avl.$(OBJEXT) \
 	proc_interrupts.$(OBJEXT) proc_softirqs.$(OBJEXT) \
 	proc_loadavg.$(OBJEXT) proc_meminfo.$(OBJEXT) \
 	proc_net_dev.$(OBJEXT) proc_net_ip_vs_stats.$(OBJEXT) \
-	proc_net_netstat.$(OBJEXT) proc_net_rpc_nfsd.$(OBJEXT) \
-	proc_net_snmp.$(OBJEXT) proc_net_snmp6.$(OBJEXT) \
+	proc_net_netstat.$(OBJEXT) proc_net_rpc_nfs.$(OBJEXT) \
+	proc_net_rpc_nfsd.$(OBJEXT) proc_net_snmp.$(OBJEXT) \
+	proc_net_snmp6.$(OBJEXT) proc_net_softnet_stat.$(OBJEXT) \
 	proc_net_stat_conntrack.$(OBJEXT) \
 	proc_net_stat_synproxy.$(OBJEXT) proc_stat.$(OBJEXT) \
 	proc_self_mountinfo.$(OBJEXT) \
@@ -279,6 +285,7 @@ PTHREAD_CFLAGS = @PTHREAD_CFLAGS@
 PTHREAD_LIBS = @PTHREAD_LIBS@
 SET_MAKE = @SET_MAKE@
 SHELL = @SHELL@
+SSE_CANDIDATE = @SSE_CANDIDATE@
 STRIP = @STRIP@
 UUID_CFLAGS = @UUID_CFLAGS@
 UUID_LIBS = @UUID_LIBS@
@@ -311,6 +318,8 @@ datarootdir = @datarootdir@
 docdir = @docdir@
 dvidir = @dvidir@
 exec_prefix = @exec_prefix@
+has_jemalloc = @has_jemalloc@
+has_tcmalloc = @has_tcmalloc@
 host = @host@
 host_alias = @host_alias@
 host_cpu = @host_cpu@
@@ -398,9 +407,11 @@ netdata_SOURCES = \
 	proc_net_dev.c \
 	proc_net_ip_vs_stats.c \
 	proc_net_netstat.c \
+	proc_net_rpc_nfs.c \
 	proc_net_rpc_nfsd.c \
 	proc_net_snmp.c \
 	proc_net_snmp6.c \
+	proc_net_softnet_stat.c \
 	proc_net_stat_conntrack.c \
 	proc_net_stat_synproxy.c \
 	proc_stat.c \
@@ -596,9 +607,11 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_dev.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_ip_vs_stats.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_netstat.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_rpc_nfs.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_rpc_nfsd.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_snmp.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_snmp6.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_softnet_stat.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_stat_conntrack.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_net_stat_synproxy.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/proc_self_mountinfo.Po@am__quote@
diff --git a/src/appconfig.c b/src/appconfig.c
index 34fb6d7d3..947407484 100644
--- a/src/appconfig.c
+++ b/src/appconfig.c
@@ -464,9 +464,17 @@ void generate_config(BUFFER *wb, int only_changed)
         switch(i) {
             case 0:
                 buffer_strcat(wb,
-                    "# NetData Configuration\n"
+                    "# netdata configuration\n"
+                    "#\n"
+                    "# You can download the latest version of this file, using:\n"
+                    "#\n"
+                    "#  wget -O /etc/netdata/netdata.conf http://localhost:19999/netdata.conf\n"
+                    "# or\n"
+                    "#  curl -o /etc/netdata/netdata.conf http://localhost:19999/netdata.conf\n"
+                    "#\n"
                     "# You can uncomment and change any of the options below.\n"
                     "# The value shown in the commented settings, is the default value.\n"
+                    "#\n"
                     "\n# global netdata configuration\n");
                 break;
 
diff --git a/src/apps_plugin.c b/src/apps_plugin.c
index ee400b72e..f22a575ba 100644
--- a/src/apps_plugin.c
+++ b/src/apps_plugin.c
@@ -13,8 +13,6 @@
 // etc.
 #define RATES_DETAIL 10000ULL
 
-int processors = 1;
-pid_t pid_max = 32768;
 int debug = 0;
 
 int update_every = 1;
@@ -22,7 +20,6 @@ unsigned long long global_iterations_counter = 1;
 unsigned long long file_counter = 0;
 int proc_pid_cmdline_is_needed = 0;
 int include_exited_childs = 1;
-char *host_prefix = "";
 char *config_dir = CONFIG_DIR;
 
 pid_t *all_pids_sortlist = NULL;
@@ -42,58 +39,6 @@ void netdata_cleanup_and_exit(int ret) {
 
 
 // ----------------------------------------------------------------------------
-// system functions
-// to retrieve settings of the system
-
-long get_system_cpus(void) {
-    procfile *ff = NULL;
-
-    int processors = 0;
-
-    char filename[FILENAME_MAX + 1];
-    snprintfz(filename, FILENAME_MAX, "%s/proc/stat", host_prefix);
-
-    ff = procfile_open(filename, NULL, PROCFILE_FLAG_DEFAULT);
-    if(!ff) return 1;
-
-    ff = procfile_readall(ff);
-    if(!ff)
-        return 1;
-
-    unsigned int i;
-    for(i = 0; i < procfile_lines(ff); i++) {
-        if(!procfile_linewords(ff, i)) continue;
-
-        if(strncmp(procfile_lineword(ff, i, 0), "cpu", 3) == 0) processors++;
-    }
-    processors--;
-    if(processors < 1) processors = 1;
-
-    procfile_close(ff);
-    return processors;
-}
-
-pid_t get_system_pid_max(void) {
-    procfile *ff = NULL;
-    pid_t mpid = 32768;
-
-    char filename[FILENAME_MAX + 1];
-    snprintfz(filename, FILENAME_MAX, "%s/proc/sys/kernel/pid_max", host_prefix);
-    ff = procfile_open(filename, NULL, PROCFILE_FLAG_DEFAULT);
-    if(!ff) return mpid;
-
-    ff = procfile_readall(ff);
-    if(!ff)
-        return mpid;
-
-    mpid = (pid_t)atoi(procfile_lineword(ff, 0, 0));
-    if(!mpid) mpid = 32768;
-
-    procfile_close(ff);
-    return mpid;
-}
-
-// ----------------------------------------------------------------------------
 // target
 // target is the structure that process data are aggregated
 
@@ -121,23 +66,23 @@ struct target {
     unsigned long long cstime;
     unsigned long long cgtime;
     unsigned long long num_threads;
-    unsigned long long rss;
+    // unsigned long long rss;
 
     unsigned long long statm_size;
     unsigned long long statm_resident;
     unsigned long long statm_share;
-    unsigned long long statm_text;
-    unsigned long long statm_lib;
-    unsigned long long statm_data;
-    unsigned long long statm_dirty;
+    // unsigned long long statm_text;
+    // unsigned long long statm_lib;
+    // unsigned long long statm_data;
+    // unsigned long long statm_dirty;
 
     unsigned long long io_logical_bytes_read;
     unsigned long long io_logical_bytes_written;
-    unsigned long long io_read_calls;
-    unsigned long long io_write_calls;
+    // unsigned long long io_read_calls;
+    // unsigned long long io_write_calls;
     unsigned long long io_storage_bytes_read;
     unsigned long long io_storage_bytes_written;
-    unsigned long long io_cancelled_write_bytes;
+    // unsigned long long io_cancelled_write_bytes;
 
     int *fds;
     unsigned long long openfiles;
@@ -440,7 +385,7 @@ struct pid_stat {
     // int64_t itrealvalue;
     // unsigned long long starttime;
     // unsigned long long vsize;
-    unsigned long long rss;
+    // unsigned long long rss;
     // unsigned long long rsslim;
     // unsigned long long starcode;
     // unsigned long long endcode;
@@ -466,26 +411,26 @@ struct pid_stat {
     unsigned long long statm_size;
     unsigned long long statm_resident;
     unsigned long long statm_share;
-    unsigned long long statm_text;
-    unsigned long long statm_lib;
-    unsigned long long statm_data;
-    unsigned long long statm_dirty;
+    // unsigned long long statm_text;
+    // unsigned long long statm_lib;
+    // unsigned long long statm_data;
+    // unsigned long long statm_dirty;
 
     unsigned long long io_logical_bytes_read_raw;
     unsigned long long io_logical_bytes_written_raw;
-    unsigned long long io_read_calls_raw;
-    unsigned long long io_write_calls_raw;
+    // unsigned long long io_read_calls_raw;
+    // unsigned long long io_write_calls_raw;
     unsigned long long io_storage_bytes_read_raw;
     unsigned long long io_storage_bytes_written_raw;
-    unsigned long long io_cancelled_write_bytes_raw;
+    // unsigned long long io_cancelled_write_bytes_raw;
 
     unsigned long long io_logical_bytes_read;
     unsigned long long io_logical_bytes_written;
-    unsigned long long io_read_calls;
-    unsigned long long io_write_calls;
+    // unsigned long long io_read_calls;
+    // unsigned long long io_write_calls;
     unsigned long long io_storage_bytes_read;
     unsigned long long io_storage_bytes_written;
-    unsigned long long io_cancelled_write_bytes;
+    // unsigned long long io_cancelled_write_bytes;
 
     int *fds;                       // array of fds it uses
     int fds_size;                   // the size of the fds array
@@ -573,10 +518,10 @@ void del_pid_entry(pid_t pid) {
 // update pids from proc
 
 int read_proc_pid_cmdline(struct pid_stat *p) {
-    
+
     if(unlikely(!p->cmdline_filename)) {
         char filename[FILENAME_MAX + 1];
-        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/cmdline", host_prefix, p->pid);
+        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/cmdline", global_host_prefix, p->pid);
         p->cmdline_filename = strdupz(filename);
     }
 
@@ -629,7 +574,7 @@ int read_proc_pid_stat(struct pid_stat *p) {
 
     if(unlikely(!p->stat_filename)) {
         char filename[FILENAME_MAX + 1];
-        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/stat", host_prefix, p->pid);
+        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/stat", global_host_prefix, p->pid);
         p->stat_filename = strdupz(filename);
     }
 
@@ -700,7 +645,7 @@ int read_proc_pid_stat(struct pid_stat *p) {
     // p->itrealvalue   = strtoull(procfile_lineword(ff, 0, 20), NULL, 10);
     // p->starttime     = strtoull(procfile_lineword(ff, 0, 21), NULL, 10);
     // p->vsize         = strtoull(procfile_lineword(ff, 0, 22), NULL, 10);
-    p->rss              = strtoull(procfile_lineword(ff, 0, 23), NULL, 10);
+    // p->rss           = strtoull(procfile_lineword(ff, 0, 23), NULL, 10);
     // p->rsslim        = strtoull(procfile_lineword(ff, 0, 24), NULL, 10);
     // p->starcode      = strtoull(procfile_lineword(ff, 0, 25), NULL, 10);
     // p->endcode       = strtoull(procfile_lineword(ff, 0, 26), NULL, 10);
@@ -737,7 +682,7 @@ int read_proc_pid_stat(struct pid_stat *p) {
     }
 
     if(unlikely(debug || (p->target && p->target->debug)))
-        fprintf(stderr, "apps.plugin: READ PROC/PID/STAT: %s/proc/%d/stat, process: '%s' on target '%s' (dt=%llu) VALUES: utime=%llu, stime=%llu, cutime=%llu, cstime=%llu, minflt=%llu, majflt=%llu, cminflt=%llu, cmajflt=%llu, threads=%d\n", host_prefix, p->pid, p->comm, (p->target)?p->target->name:"UNSET", p->stat_collected_usec - p->last_stat_collected_usec, p->utime, p->stime, p->cutime, p->cstime, p->minflt, p->majflt, p->cminflt, p->cmajflt, p->num_threads);
+        fprintf(stderr, "apps.plugin: READ PROC/PID/STAT: %s/proc/%d/stat, process: '%s' on target '%s' (dt=%llu) VALUES: utime=%llu, stime=%llu, cutime=%llu, cstime=%llu, minflt=%llu, majflt=%llu, cminflt=%llu, cmajflt=%llu, threads=%d\n", global_host_prefix, p->pid, p->comm, (p->target)?p->target->name:"UNSET", p->stat_collected_usec - p->last_stat_collected_usec, p->utime, p->stime, p->cutime, p->cstime, p->minflt, p->majflt, p->cminflt, p->cmajflt, p->num_threads);
 
     if(unlikely(global_iterations_counter == 1)) {
         p->minflt           = 0;
@@ -766,7 +711,7 @@ cleanup:
     p->cstime           = 0;
     p->cgtime           = 0;
     p->num_threads      = 0;
-    p->rss              = 0;
+    // p->rss              = 0;
     return 0;
 }
 
@@ -775,7 +720,7 @@ int read_proc_pid_statm(struct pid_stat *p) {
 
     if(unlikely(!p->statm_filename)) {
         char filename[FILENAME_MAX + 1];
-        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/statm", host_prefix, p->pid);
+        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/statm", global_host_prefix, p->pid);
         p->statm_filename = strdupz(filename);
     }
 
@@ -790,10 +735,10 @@ int read_proc_pid_statm(struct pid_stat *p) {
     p->statm_size           = strtoull(procfile_lineword(ff, 0, 0), NULL, 10);
     p->statm_resident       = strtoull(procfile_lineword(ff, 0, 1), NULL, 10);
     p->statm_share          = strtoull(procfile_lineword(ff, 0, 2), NULL, 10);
-    p->statm_text           = strtoull(procfile_lineword(ff, 0, 3), NULL, 10);
-    p->statm_lib            = strtoull(procfile_lineword(ff, 0, 4), NULL, 10);
-    p->statm_data           = strtoull(procfile_lineword(ff, 0, 5), NULL, 10);
-    p->statm_dirty          = strtoull(procfile_lineword(ff, 0, 6), NULL, 10);
+    // p->statm_text           = strtoull(procfile_lineword(ff, 0, 3), NULL, 10);
+    // p->statm_lib            = strtoull(procfile_lineword(ff, 0, 4), NULL, 10);
+    // p->statm_data           = strtoull(procfile_lineword(ff, 0, 5), NULL, 10);
+    // p->statm_dirty          = strtoull(procfile_lineword(ff, 0, 6), NULL, 10);
 
     return 1;
 
@@ -801,10 +746,10 @@ cleanup:
     p->statm_size           = 0;
     p->statm_resident       = 0;
     p->statm_share          = 0;
-    p->statm_text           = 0;
-    p->statm_lib            = 0;
-    p->statm_data           = 0;
-    p->statm_dirty          = 0;
+    // p->statm_text           = 0;
+    // p->statm_lib            = 0;
+    // p->statm_data           = 0;
+    // p->statm_dirty          = 0;
     return 0;
 }
 
@@ -813,7 +758,7 @@ int read_proc_pid_io(struct pid_stat *p) {
 
     if(unlikely(!p->io_filename)) {
         char filename[FILENAME_MAX + 1];
-        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/io", host_prefix, p->pid);
+        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/io", global_host_prefix, p->pid);
         p->io_filename = strdupz(filename);
     }
 
@@ -839,13 +784,13 @@ int read_proc_pid_io(struct pid_stat *p) {
     p->io_logical_bytes_written_raw = strtoull(procfile_lineword(ff, 1, 1), NULL, 10);
     p->io_logical_bytes_written = (p->io_logical_bytes_written_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
 
-    last = p->io_read_calls_raw;
-    p->io_read_calls_raw = strtoull(procfile_lineword(ff, 2, 1), NULL, 10);
-    p->io_read_calls = (p->io_read_calls_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
+    // last = p->io_read_calls_raw;
+    // p->io_read_calls_raw = strtoull(procfile_lineword(ff, 2, 1), NULL, 10);
+    // p->io_read_calls = (p->io_read_calls_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
 
-    last = p->io_write_calls_raw;
-    p->io_write_calls_raw = strtoull(procfile_lineword(ff, 3, 1), NULL, 10);
-    p->io_write_calls = (p->io_write_calls_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
+    // last = p->io_write_calls_raw;
+    // p->io_write_calls_raw = strtoull(procfile_lineword(ff, 3, 1), NULL, 10);
+    // p->io_write_calls = (p->io_write_calls_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
 
     last = p->io_storage_bytes_read_raw;
     p->io_storage_bytes_read_raw = strtoull(procfile_lineword(ff, 4, 1), NULL, 10);
@@ -855,18 +800,18 @@ int read_proc_pid_io(struct pid_stat *p) {
     p->io_storage_bytes_written_raw = strtoull(procfile_lineword(ff, 5, 1), NULL, 10);
     p->io_storage_bytes_written = (p->io_storage_bytes_written_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
 
-    last = p->io_cancelled_write_bytes_raw;
-    p->io_cancelled_write_bytes_raw = strtoull(procfile_lineword(ff, 6, 1), NULL, 10);
-    p->io_cancelled_write_bytes = (p->io_cancelled_write_bytes_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
+    // last = p->io_cancelled_write_bytes_raw;
+    // p->io_cancelled_write_bytes_raw = strtoull(procfile_lineword(ff, 6, 1), NULL, 10);
+    // p->io_cancelled_write_bytes = (p->io_cancelled_write_bytes_raw - last) * (1000000ULL * RATES_DETAIL) / (p->io_collected_usec - p->last_io_collected_usec);
 
     if(unlikely(global_iterations_counter == 1)) {
         p->io_logical_bytes_read        = 0;
         p->io_logical_bytes_written     = 0;
-        p->io_read_calls                = 0;
-        p->io_write_calls               = 0;
+        // p->io_read_calls             = 0;
+        // p->io_write_calls            = 0;
         p->io_storage_bytes_read        = 0;
         p->io_storage_bytes_written     = 0;
-        p->io_cancelled_write_bytes     = 0;
+        // p->io_cancelled_write_bytes  = 0;
     }
 
     return 1;
@@ -874,11 +819,11 @@ int read_proc_pid_io(struct pid_stat *p) {
 cleanup:
     p->io_logical_bytes_read        = 0;
     p->io_logical_bytes_written     = 0;
-    p->io_read_calls                = 0;
-    p->io_write_calls               = 0;
+    // p->io_read_calls             = 0;
+    // p->io_write_calls            = 0;
     p->io_storage_bytes_read        = 0;
     p->io_storage_bytes_written     = 0;
-    p->io_cancelled_write_bytes     = 0;
+    // p->io_cancelled_write_bytes  = 0;
     return 0;
 }
 
@@ -892,7 +837,7 @@ int read_proc_stat() {
     static unsigned long long utime_raw = 0, stime_raw = 0, gtime_raw = 0, gntime_raw = 0, ntime_raw = 0, collected_usec = 0, last_collected_usec = 0;
 
     if(unlikely(!ff)) {
-        snprintfz(filename, FILENAME_MAX, "%s/proc/stat", host_prefix);
+        snprintfz(filename, FILENAME_MAX, "%s/proc/stat", global_host_prefix);
         ff = procfile_open(filename, " \t:", PROCFILE_FLAG_DEFAULT);
         if(unlikely(!ff)) goto cleanup;
     }
@@ -1194,7 +1139,7 @@ int file_descriptor_find_or_add(const char *name)
 int read_pid_file_descriptors(struct pid_stat *p) {
     char dirname[FILENAME_MAX+1];
 
-    snprintfz(dirname, FILENAME_MAX, "%s/proc/%d/fd", host_prefix, p->pid);
+    snprintfz(dirname, FILENAME_MAX, "%s/proc/%d/fd", global_host_prefix, p->pid);
     DIR *fds = opendir(dirname);
     if(fds) {
         int c;
@@ -1232,7 +1177,7 @@ int read_pid_file_descriptors(struct pid_stat *p) {
             if(p->fds[fdid] == 0) {
                 // we don't know this fd, get it
 
-                sprintf(fdname, "%s/proc/%d/fd/%s", host_prefix, p->pid, de->d_name);
+                sprintf(fdname, "%s/proc/%d/fd/%s", global_host_prefix, p->pid, de->d_name);
                 ssize_t l = readlink(fdname, linkname, FILENAME_MAX);
                 if(l == -1) {
                     if(debug || (p->target && p->target->debug)) {
@@ -1328,14 +1273,14 @@ void find_lost_child_debug(struct pid_stat *pe, unsigned long long lost, int typ
                     found++;
                 }
                 break;
-                
+
             case 2:
                 if(p->cmajflt > lost) {
                     fprintf(stderr, " > process %d (%s) could use the lost exited child majflt %llu of process %d (%s)\n", p->pid, p->comm, lost, pe->pid, pe->comm);
                     found++;
                 }
                 break;
-                
+
             case 3:
                 if(p->cutime > lost) {
                     fprintf(stderr, " > process %d (%s) could use the lost exited child utime %llu of process %d (%s)\n", p->pid, p->comm, lost, pe->pid, pe->comm);
@@ -1364,11 +1309,11 @@ void find_lost_child_debug(struct pid_stat *pe, unsigned long long lost, int typ
             case 1:
                 fprintf(stderr, " > cannot find any process to use the lost exited child minflt %llu of process %d (%s)\n", lost, pe->pid, pe->comm);
                 break;
-                
+
             case 2:
                 fprintf(stderr, " > cannot find any process to use the lost exited child majflt %llu of process %d (%s)\n", lost, pe->pid, pe->comm);
                 break;
-                
+
             case 3:
                 fprintf(stderr, " > cannot find any process to use the lost exited child utime %llu of process %d (%s)\n", lost, pe->pid, pe->comm);
                 break;
@@ -1583,19 +1528,19 @@ static inline int managed_log(struct pid_stat *p, uint32_t log, int status) {
                 p->log_thrown |= log;
                 switch(log) {
                     case PID_LOG_IO:
-                        error("Cannot process %s/proc/%d/io (command '%s')", host_prefix, p->pid, p->comm);
+                        error("Cannot process %s/proc/%d/io (command '%s')", global_host_prefix, p->pid, p->comm);
                         break;
 
                     case PID_LOG_STATM:
-                        error("Cannot process %s/proc/%d/statm (command '%s')", host_prefix, p->pid, p->comm);
+                        error("Cannot process %s/proc/%d/statm (command '%s')", global_host_prefix, p->pid, p->comm);
                         break;
 
                     case PID_LOG_CMDLINE:
-                        error("Cannot process %s/proc/%d/cmdline (command '%s')", host_prefix, p->pid, p->comm);
+                        error("Cannot process %s/proc/%d/cmdline (command '%s')", global_host_prefix, p->pid, p->comm);
                         break;
 
                     case PID_LOG_FDS:
-                        error("Cannot process entries in %s/proc/%d/fd (command '%s')", host_prefix, p->pid, p->comm);
+                        error("Cannot process entries in %s/proc/%d/fd (command '%s')", global_host_prefix, p->pid, p->comm);
                         break;
 
                     case PID_LOG_STAT:
@@ -1751,7 +1696,7 @@ int collect_data_for_all_processes_from_proc(void) {
 
     char dirname[FILENAME_MAX + 1];
 
-    snprintfz(dirname, FILENAME_MAX, "%s/proc", host_prefix);
+    snprintfz(dirname, FILENAME_MAX, "%s/proc", global_host_prefix);
     DIR *dir = opendir(dirname);
     if(!dir) return 0;
 
@@ -1957,24 +1902,24 @@ long zero_all_targets(struct target *root) {
         w->cstime = 0;
         w->cgtime = 0;
         w->num_threads = 0;
-        w->rss = 0;
+        // w->rss = 0;
         w->processes = 0;
 
         w->statm_size = 0;
         w->statm_resident = 0;
         w->statm_share = 0;
-        w->statm_text = 0;
-        w->statm_lib = 0;
-        w->statm_data = 0;
-        w->statm_dirty = 0;
+        // w->statm_text = 0;
+        // w->statm_lib = 0;
+        // w->statm_data = 0;
+        // w->statm_dirty = 0;
 
         w->io_logical_bytes_read = 0;
         w->io_logical_bytes_written = 0;
-        w->io_read_calls = 0;
-        w->io_write_calls = 0;
+        // w->io_read_calls = 0;
+        // w->io_write_calls = 0;
         w->io_storage_bytes_read = 0;
         w->io_storage_bytes_written = 0;
-        w->io_cancelled_write_bytes = 0;
+        // w->io_cancelled_write_bytes = 0;
     }
 
     return count;
@@ -1999,23 +1944,23 @@ void aggregate_pid_on_target(struct target *w, struct pid_stat *p, struct target
         w->minflt += p->minflt;
         w->majflt += p->majflt;
 
-        w->rss += p->rss;
+        // w->rss += p->rss;
 
         w->statm_size += p->statm_size;
         w->statm_resident += p->statm_resident;
         w->statm_share += p->statm_share;
-        w->statm_text += p->statm_text;
-        w->statm_lib += p->statm_lib;
-        w->statm_data += p->statm_data;
-        w->statm_dirty += p->statm_dirty;
+        // w->statm_text += p->statm_text;
+        // w->statm_lib += p->statm_lib;
+        // w->statm_data += p->statm_data;
+        // w->statm_dirty += p->statm_dirty;
 
         w->io_logical_bytes_read    += p->io_logical_bytes_read;
         w->io_logical_bytes_written += p->io_logical_bytes_written;
-        w->io_read_calls            += p->io_read_calls;
-        w->io_write_calls           += p->io_write_calls;
+        // w->io_read_calls            += p->io_read_calls;
+        // w->io_write_calls           += p->io_write_calls;
         w->io_storage_bytes_read    += p->io_storage_bytes_read;
         w->io_storage_bytes_written += p->io_storage_bytes_written;
-        w->io_cancelled_write_bytes += p->io_cancelled_write_bytes;
+        // w->io_cancelled_write_bytes += p->io_cancelled_write_bytes;
 
         w->processes++;
         w->num_threads += p->num_threads;
@@ -2230,8 +2175,8 @@ unsigned long long send_resource_usage_to_netdata() {
         cpuuser = me.ru_utime.tv_sec * 1000000ULL + me.ru_utime.tv_usec;
         cpusyst = me.ru_stime.tv_sec * 1000000ULL + me.ru_stime.tv_usec;
 
-        bcopy(&now, &last, sizeof(struct timeval));
-        bcopy(&me, &me_last, sizeof(struct rusage));
+        memmove(&last, &now, sizeof(struct timeval));
+        memmove(&me_last, &me, sizeof(struct rusage));
     }
 
     buffer_sprintf(output,
@@ -2488,6 +2433,13 @@ void send_collected_data_to_netdata(struct target *root, const char *type, unsig
     }
     send_END();
 
+    send_BEGIN(type, "vmem", usec);
+    for (w = root; w ; w = w->next) {
+        if(unlikely(w->exposed))
+            send_SET(w->name, w->statm_size);
+    }
+    send_END();
+
     send_BEGIN(type, "minor_faults", usec);
     for (w = root; w ; w = w->next) {
         if(unlikely(w->exposed))
@@ -2584,7 +2536,13 @@ void send_charts_updates_to_netdata(struct target *root, const char *type, const
             buffer_sprintf(output, "DIMENSION %s '' absolute 1 %llu %s\n", w->name, hz * RATES_DETAIL / 100, w->hidden ? "hidden" : "");
     }
 
-    buffer_sprintf(output, "CHART %s.mem '' '%s Dedicated Memory (w/o shared)' 'MB' mem %s.mem stacked 20003 %d\n", type, title, type, update_every);
+    buffer_sprintf(output, "CHART %s.mem '' '%s Real Memory (w/o shared)' 'MB' mem %s.mem stacked 20003 %d\n", type, title, type, update_every);
+    for (w = root; w ; w = w->next) {
+        if(unlikely(w->exposed))
+            buffer_sprintf(output, "DIMENSION %s '' absolute %ld %ld\n", w->name, sysconf(_SC_PAGESIZE), 1024L*1024L);
+    }
+
+    buffer_sprintf(output, "CHART %s.vmem '' '%s Virtual Memory Size' 'MB' mem %s.vmem stacked 20004 %d\n", type, title, type, update_every);
     for (w = root; w ; w = w->next) {
         if(unlikely(w->exposed))
             buffer_sprintf(output, "DIMENSION %s '' absolute %ld %ld\n", w->name, sysconf(_SC_PAGESIZE), 1024L*1024L);
@@ -2803,12 +2761,12 @@ int main(int argc, char **argv)
     error_log_errors_per_period = 100;
     error_log_throttle_period = 3600;
 
-    host_prefix = getenv("NETDATA_HOST_PREFIX");
-    if(host_prefix == NULL) {
+    global_host_prefix = getenv("NETDATA_HOST_PREFIX");
+    if(global_host_prefix == NULL) {
         // info("NETDATA_HOST_PREFIX is not passed from netdata");
-        host_prefix = "";
+        global_host_prefix = "";
     }
-    // else info("Found NETDATA_HOST_PREFIX='%s'", host_prefix);
+    // else info("Found NETDATA_HOST_PREFIX='%s'", global_host_prefix);
 
     config_dir = getenv("NETDATA_CONFIG_DIR");
     if(config_dir == NULL) {
@@ -2830,9 +2788,9 @@ int main(int argc, char **argv)
 
     time_t started_t = time(NULL);
     time_t current_t;
-    get_HZ();
-    pid_max = get_system_pid_max();
-    processors = get_system_cpus();
+    get_system_HZ();
+    get_system_pid_max();
+    get_system_cpus();
 
     parse_args(argc, argv);
 
diff --git a/src/common.c b/src/common.c
index 7d0fac9aa..e1925ff5e 100644
--- a/src/common.c
+++ b/src/common.c
@@ -14,31 +14,181 @@ volatile sig_atomic_t netdata_exit = 0;
 // its lifetime), these can be used to override the default system allocation
 // routines.
 
+#ifdef NETDATA_LOG_ALLOCATIONS
+static struct memory_statistics {
+    volatile size_t malloc_calls_made;
+    volatile size_t calloc_calls_made;
+    volatile size_t realloc_calls_made;
+    volatile size_t strdup_calls_made;
+    volatile size_t free_calls_made;
+    volatile size_t memory_calls_made;
+    volatile size_t allocated_memory;
+    volatile size_t mmapped_memory;
+} memory_statistics;
+
+static inline void print_allocations(const char *file, const char *function, const unsigned long line) {
+    static struct memory_statistics old = { 0, 0, 0, 0, 0, 0, 0, 0 };
+
+    //if(unlikely(!(memory_statistics.memory_calls_made % 5))) {
+        fprintf(stderr, "(%04lu@%-10.10s:%-15.15s): Allocated %zu KB (+%zu B), mmapped %zu KB (+%zu B): malloc %zu (+%zu), calloc %zu (+%zu), realloc %zu (+%zu), strdup %zu (+%zu), free %zu (+%zu)\n",
+                line, file, function,
+                (memory_statistics.allocated_memory + 512) / 1024, memory_statistics.allocated_memory - old.allocated_memory,
+                (memory_statistics.mmapped_memory + 512) / 1024, memory_statistics.mmapped_memory - old.mmapped_memory,
+                memory_statistics.malloc_calls_made, memory_statistics.malloc_calls_made - old.malloc_calls_made,
+                memory_statistics.calloc_calls_made, memory_statistics.calloc_calls_made - old.calloc_calls_made,
+                memory_statistics.realloc_calls_made, memory_statistics.realloc_calls_made - old.realloc_calls_made,
+                memory_statistics.strdup_calls_made, memory_statistics.strdup_calls_made - old.strdup_calls_made,
+                memory_statistics.free_calls_made, memory_statistics.free_calls_made - old.free_calls_made
+        );
+
+        memcpy(&old, &memory_statistics, sizeof(struct memory_statistics));
+    //}
+}
+
+static inline void malloc_accounting(const char *file, const char *function, const unsigned long line, size_t size) {
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
+    __atomic_fetch_add(&memory_statistics.memory_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.malloc_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.allocated_memory, size, __ATOMIC_SEQ_CST);
+#else
+    // this is for debugging - we don't care locking it
+    memory_statistics.memory_calls_made++;
+    memory_statistics.malloc_calls_made++;
+    memory_statistics.allocated_memory += size;
+#endif
+    print_allocations(file, function, line);
+}
+
+static inline void mmap_accounting(size_t size) {
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
+    __atomic_fetch_add(&memory_statistics.malloc_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.mmapped_memory, size, __ATOMIC_SEQ_CST);
+#else
+    // this is for debugging - we don't care locking it
+    memory_statistics.memory_calls_made++;
+    memory_statistics.mmapped_memory += size;
+#endif
+}
+
+static inline void calloc_accounting(const char *file, const char *function, const unsigned long line, size_t size) {
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
+    __atomic_fetch_add(&memory_statistics.memory_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.calloc_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.allocated_memory, size, __ATOMIC_SEQ_CST);
+#else
+    // this is for debugging - we don't care locking it
+    memory_statistics.memory_calls_made++;
+    memory_statistics.calloc_calls_made++;
+    memory_statistics.allocated_memory += size;
+#endif
+    print_allocations(file, function, line);
+}
+
+static inline void realloc_accounting(const char *file, const char *function, const unsigned long line, void *ptr, size_t size) {
+    (void)ptr;
+
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
+    __atomic_fetch_add(&memory_statistics.memory_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.realloc_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.allocated_memory, size, __ATOMIC_SEQ_CST);
+#else
+    // this is for debugging - we don't care locking it
+    memory_statistics.memory_calls_made++;
+    memory_statistics.realloc_calls_made++;
+    memory_statistics.allocated_memory += size;
+#endif
+    print_allocations(file, function, line);
+}
+
+static inline void strdup_accounting(const char *file, const char *function, const unsigned long line, const char *s) {
+    size_t size = strlen(s) + 1;
+
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
+    __atomic_fetch_add(&memory_statistics.memory_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.strdup_calls_made, 1, __ATOMIC_SEQ_CST);
+    __atomic_fetch_add(&memory_statistics.allocated_memory, size, __ATOMIC_SEQ_CST);
+#else
+    // this is for debugging - we don't care locking it
+    memory_statistics.memory_calls_made++;
+    memory_statistics.strdup_calls_made++;
+    memory_statistics.allocated_memory += size;
+#endif
+    print_allocations(file, function, line);
+}
+
+static inline void free_accounting(const char *file, const char *function, const unsigned long line, void *ptr) {
+    (void)file;
+    (void)function;
+    (void)line;
+
+    if(likely(ptr)) {
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
+        __atomic_fetch_add(&memory_statistics.memory_calls_made, 1, __ATOMIC_SEQ_CST);
+        __atomic_fetch_add(&memory_statistics.free_calls_made, 1, __ATOMIC_SEQ_CST);
+#else
+        // this is for debugging - we don't care locking it
+        memory_statistics.memory_calls_made++;
+        memory_statistics.free_calls_made++;
+#endif
+    }
+}
+#endif
+
+#ifdef NETDATA_LOG_ALLOCATIONS
+char *strdupz_int(const char *file, const char *function, const unsigned long line, const char *s) {
+    strdup_accounting(file, function, line, s);
+#else
 char *strdupz(const char *s) {
+#endif
+
     char *t = strdup(s);
     if (unlikely(!t)) fatal("Cannot strdup() string '%s'", s);
     return t;
 }
 
+#ifdef NETDATA_LOG_ALLOCATIONS
+void *mallocz_int(const char *file, const char *function, const unsigned long line, size_t size) {
+    malloc_accounting(file, function, line, size);
+#else
 void *mallocz(size_t size) {
+#endif
+
     void *p = malloc(size);
     if (unlikely(!p)) fatal("Cannot allocate %zu bytes of memory.", size);
     return p;
 }
 
+#ifdef NETDATA_LOG_ALLOCATIONS
+void *callocz_int(const char *file, const char *function, const unsigned long line, size_t nmemb, size_t size) {
+    calloc_accounting(file, function, line, nmemb * size);
+#else
 void *callocz(size_t nmemb, size_t size) {
+#endif
+
     void *p = calloc(nmemb, size);
     if (unlikely(!p)) fatal("Cannot allocate %zu bytes of memory.", nmemb * size);
     return p;
 }
 
+#ifdef NETDATA_LOG_ALLOCATIONS
+void *reallocz_int(const char *file, const char *function, const unsigned long line, void *ptr, size_t size) {
+    realloc_accounting(file, function, line, ptr, size);
+#else
 void *reallocz(void *ptr, size_t size) {
+#endif
+
     void *p = realloc(ptr, size);
     if (unlikely(!p)) fatal("Cannot re-allocate memory to %zu bytes.", size);
     return p;
 }
 
+#ifdef NETDATA_LOG_ALLOCATIONS
+void freez_int(const char *file, const char *function, const unsigned long line, void *ptr) {
+    free_accounting(file, function, line, ptr);
+#else
 void freez(void *ptr) {
+#endif
+
     free(ptr);
 }
 
@@ -770,7 +920,14 @@ void *mymmap(const char *filename, size_t size, int flags, int ksm) {
                 if (flags & MAP_SHARED || !enable_ksm || !ksm) {
 #endif
                     mem = mmap(NULL, size, PROT_READ | PROT_WRITE, flags, fd, 0);
-                    if (mem != MAP_FAILED) {
+                    if (mem == MAP_FAILED) {
+                        error("Cannot allocate SHARED memory for file '%s'.", filename);
+                        mem = NULL;
+                    }
+                    else {
+#ifdef NETDATA_LOG_ALLOCATIONS
+                        mmap_accounting(size);
+#endif
                         int advise = MADV_SEQUENTIAL | MADV_DONTFORK;
                         if (flags & MAP_SHARED) advise |= MADV_WILLNEED;
 
@@ -780,7 +937,8 @@ void *mymmap(const char *filename, size_t size, int flags, int ksm) {
                         }
                     }
 #ifdef MADV_MERGEABLE
-                } else {
+                }
+                else {
 /*
                     // test - load the file into memory
                     mem = calloc(1, size);
@@ -794,7 +952,14 @@ void *mymmap(const char *filename, size_t size, int flags, int ksm) {
                     }
 */
                     mem = mmap(NULL, size, PROT_READ | PROT_WRITE, flags | MAP_ANONYMOUS, -1, 0);
-                    if (mem != MAP_FAILED) {
+                    if (mem == MAP_FAILED) {
+                        error("Cannot allocate PRIVATE ANONYMOUS memory for KSM for file '%s'.", filename);
+                        mem = NULL;
+                    }
+                    else {
+#ifdef NETDATA_LOG_ALLOCATIONS
+                        mmap_accounting(size);
+#endif
                         if (lseek(fd, 0, SEEK_SET) == 0) {
                             if (read(fd, mem, size) != (ssize_t) size)
                                 error("Cannot read from file '%s'", filename);
@@ -813,17 +978,19 @@ void *mymmap(const char *filename, size_t size, int flags, int ksm) {
                                   filename);
                             log_madvise_3--;
                         }
-                    } else
-                        error("Cannot allocate PRIVATE ANONYMOUS memory for KSM for file '%s'.", filename);
+                    }
                 }
 #endif
-            } else
+            }
+            else
                 error("Cannot write to file '%s' at position %zu.", filename, size);
-        } else
+        }
+        else
             error("Cannot seek file '%s' to size %zu.", filename, size);
 
         close(fd);
-    } else
+    }
+    else
         error("Cannot create/open file '%s'.", filename);
 
     return mem;
@@ -860,23 +1027,6 @@ int fd_is_valid(int fd) {
     return fcntl(fd, F_GETFD) != -1 || errno != EBADF;
 }
 
-/*
- ***************************************************************************
- * Get number of clock ticks per second.
- ***************************************************************************
- */
-unsigned int hz;
-
-void get_HZ(void) {
-    long ticks;
-
-    if ((ticks = sysconf(_SC_CLK_TCK)) == -1) {
-        perror("sysconf");
-    }
-
-    hz = (unsigned int) ticks;
-}
-
 pid_t gettid(void) {
     return (pid_t)syscall(SYS_gettid);
 }
@@ -933,3 +1083,103 @@ int snprintfz(char *dst, size_t n, const char *fmt, ...) {
 
     return ret;
 }
+
+// ----------------------------------------------------------------------------
+// system functions
+// to retrieve settings of the system
+
+int processors = 1;
+long get_system_cpus(void) {
+    procfile *ff = NULL;
+
+    processors = 1;
+
+    char filename[FILENAME_MAX + 1];
+    snprintfz(filename, FILENAME_MAX, "%s/proc/stat", global_host_prefix);
+
+    ff = procfile_open(filename, NULL, PROCFILE_FLAG_DEFAULT);
+    if(!ff) {
+        error("Cannot open file '%s'. Assuming system has %d processors.", filename, processors);
+        return processors;
+    }
+
+    ff = procfile_readall(ff);
+    if(!ff) {
+        error("Cannot open file '%s'. Assuming system has %d processors.", filename, processors);
+        return processors;
+    }
+
+    processors = 0;
+    unsigned int i;
+    for(i = 0; i < procfile_lines(ff); i++) {
+        if(!procfile_linewords(ff, i)) continue;
+
+        if(strncmp(procfile_lineword(ff, i, 0), "cpu", 3) == 0) processors++;
+    }
+    processors--;
+    if(processors < 1) processors = 1;
+
+    procfile_close(ff);
+
+    info("System has %d processors.", processors);
+    return processors;
+}
+
+pid_t pid_max = 32768;
+pid_t get_system_pid_max(void) {
+    procfile *ff = NULL;
+
+    char filename[FILENAME_MAX + 1];
+    snprintfz(filename, FILENAME_MAX, "%s/proc/sys/kernel/pid_max", global_host_prefix);
+    ff = procfile_open(filename, NULL, PROCFILE_FLAG_DEFAULT);
+    if(!ff) {
+        error("Cannot open file '%s'. Assuming system supports %d pids.", filename, pid_max);
+        return pid_max;
+    }
+
+    ff = procfile_readall(ff);
+    if(!ff) {
+        error("Cannot read file '%s'. Assuming system supports %d pids.", filename, pid_max);
+        return pid_max;
+    }
+
+    pid_max = (pid_t)atoi(procfile_lineword(ff, 0, 0));
+    if(!pid_max) {
+        procfile_close(ff);
+        pid_max = 32768;
+        error("Cannot parse file '%s'. Assuming system supports %d pids.", filename, pid_max);
+        return pid_max;
+    }
+
+    procfile_close(ff);
+    info("System supports %d pids.", pid_max);
+    return pid_max;
+}
+
+unsigned int hz;
+void get_system_HZ(void) {
+    long ticks;
+
+    if ((ticks = sysconf(_SC_CLK_TCK)) == -1) {
+        perror("sysconf");
+    }
+
+    hz = (unsigned int) ticks;
+}
+
+int read_single_number_file(const char *filename, unsigned long long *result) {
+    char buffer[1024 + 1];
+
+    int fd = open(filename, O_RDONLY, 0666);
+    if(unlikely(fd == -1)) return 1;
+
+    ssize_t r = read(fd, buffer, 1024);
+    if(unlikely(r == -1)) {
+        close(fd);
+        return 2;
+    }
+
+    close(fd);
+    *result = strtoull(buffer, NULL, 0);
+    return 0;
+}
diff --git a/src/common.h b/src/common.h
index a6e85034b..9ffa8c8bc 100644
--- a/src/common.h
+++ b/src/common.h
@@ -5,6 +5,25 @@
 #include <config.h>
 #endif
 
+/* select the memory allocator, based on autoconf findings */
+#if defined(ENABLE_JEMALLOC)
+
+#if defined(HAVE_JEMALLOC_JEMALLOC_H)
+#include <jemalloc/jemalloc.h>
+#else
+#include <malloc.h>
+#endif
+
+#elif defined(ENABLE_TCMALLOC)
+
+#include <google/tcmalloc.h>
+
+#else /* !defined(ENABLE_JEMALLOC) && !defined(ENABLE_TCMALLOC) */
+
+#include <malloc.h>
+
+#endif
+
 #include <pthread.h>
 #include <errno.h>
 
@@ -27,7 +46,7 @@
 #include <grp.h>
 #include <pwd.h>
 #include <locale.h>
-#include <malloc.h>
+
 #include <netdb.h>
 #include <poll.h>
 #include <signal.h>
@@ -60,24 +79,16 @@
 #include <zlib.h>
 #endif
 
-#ifndef __ATOMIC_SEQ_CST
-#define NETDATA_NO_ATOMIC_INSTRUCTIONS 1
-#endif
-
-#ifdef __GNUC__
-#define GCC_VERSION (__GNUC__ * 10000 \
-                               + __GNUC_MINOR__ * 100 \
-                               + __GNUC_PATCHLEVEL__)
-
-#if __x86_64__ || __ppc64__
+#if (SIZEOF_VOID_P == 8)
 #define ENVIRONMENT64
-#else
+#elif (SIZEOF_VOID_P == 4)
 #define ENVIRONMENT32
+#else
+#error "Cannot detect if this is a 32 or 64 bit CPU"
 #endif
 
-#else // !__GNUC__
-#define NETDATA_NO_ATOMIC_INSTRUCTIONS 1
-#define ENVIRONMENT32
+#ifdef __GNUC__
+#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
 #endif // __GNUC__
 
 #include "avl.h"
@@ -139,11 +150,25 @@ extern int  vsnprintfz(char *dst, size_t n, const char *fmt, va_list args);
 extern int  snprintfz(char *dst, size_t n, const char *fmt, ...) __attribute__ (( format (printf, 3, 4)));
 
 // memory allocation functions that handle failures
+#ifdef NETDATA_LOG_ALLOCATIONS
+#define strdupz(s) strdupz_int(__FILE__, __FUNCTION__, __LINE__, s)
+#define callocz(nmemb, size) callocz_int(__FILE__, __FUNCTION__, __LINE__, nmemb, size)
+#define mallocz(size) mallocz_int(__FILE__, __FUNCTION__, __LINE__, size)
+#define reallocz(ptr, size) reallocz_int(__FILE__, __FUNCTION__, __LINE__, ptr, size)
+#define freez(ptr) freez_int(__FILE__, __FUNCTION__, __LINE__, ptr)
+
+extern char *strdupz_int(const char *file, const char *function, const unsigned long line, const char *s);
+extern void *callocz_int(const char *file, const char *function, const unsigned long line, size_t nmemb, size_t size);
+extern void *mallocz_int(const char *file, const char *function, const unsigned long line, size_t size);
+extern void *reallocz_int(const char *file, const char *function, const unsigned long line, void *ptr, size_t size);
+extern void freez_int(const char *file, const char *function, const unsigned long line, void *ptr);
+#else
 extern char *strdupz(const char *s);
 extern void *callocz(size_t nmemb, size_t size);
 extern void *mallocz(size_t size);
-extern void freez(void *ptr);
 extern void *reallocz(void *ptr, size_t size);
+extern void freez(void *ptr);
+#endif
 
 extern void *mymmap(const char *filename, size_t size, int flags, int ksm);
 extern int savememory(const char *filename, void *mem, size_t size);
@@ -153,10 +178,6 @@ extern int fd_is_valid(int fd);
 extern char *global_host_prefix;
 extern int enable_ksm;
 
-/* Number of ticks per second */
-extern unsigned int hz;
-extern void get_HZ(void);
-
 extern pid_t gettid(void);
 
 extern unsigned long long time_usec(void);
@@ -164,6 +185,17 @@ extern int sleep_usec(unsigned long long usec);
 
 extern char *fgets_trim_len(char *buf, size_t buf_size, FILE *fp, size_t *len);
 
+extern int processors;
+extern long get_system_cpus(void);
+
+extern pid_t pid_max;
+extern pid_t get_system_pid_max(void);
+
+/* Number of ticks per second */
+extern unsigned int hz;
+extern void get_system_HZ(void);
+
+
 /* fix for alpine linux */
 #ifndef RUSAGE_THREAD
 #ifdef RUSAGE_CHILDREN
@@ -171,4 +203,6 @@ extern char *fgets_trim_len(char *buf, size_t buf_size, FILE *fp, size_t *len);
 #endif
 #endif
 
+extern int read_single_number_file(const char *filename, unsigned long long *result);
+
 #endif /* NETDATA_COMMON_H */
diff --git a/src/daemon.c b/src/daemon.c
index bc4614f07..1c34405d8 100644
--- a/src/daemon.c
+++ b/src/daemon.c
@@ -15,27 +15,30 @@ void sig_handler_exit(int signo)
 void sig_handler_logrotate(int signo)
 {
     if(signo) {
-        error_log_limit_reset();
+        error_log_limit_unlimited();
         info("Received signal %d to re-open the log files", signo);
         reopen_all_log_files();
+        error_log_limit_reset();
     }
 }
 
 void sig_handler_save(int signo)
 {
     if(signo) {
-        error_log_limit_reset();
+        error_log_limit_unlimited();
         info("Received signal %d to save the database...", signo);
         rrdset_save_all();
+        error_log_limit_reset();
     }
 }
 
 void sig_handler_reload_health(int signo)
 {
     if(signo) {
-        error_log_limit_reset();
+        error_log_limit_unlimited();
         info("Received signal %d to reload health configuration...", signo);
         health_reload();
+        error_log_limit_reset();
     }
 }
 
diff --git a/src/eval.c b/src/eval.c
index 8866ee95d..397b43bd7 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -74,7 +74,7 @@ static inline calculated_number eval_check_number(calculated_number n, int *erro
 }
 
 static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABLE *v, int *error) {
-    static uint32_t this_hash = 0, now_hash = 0, after_hash = 0, before_hash = 0;
+    static uint32_t this_hash = 0, now_hash = 0, after_hash = 0, before_hash = 0, status_hash = 0, removed_hash = 0, uninitialized_hash = 0, undefined_hash = 0, clear_hash = 0, warning_hash = 0, critical_hash = 0;
     calculated_number n;
 
     if(unlikely(this_hash == 0)) {
@@ -82,9 +82,16 @@ static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABL
         now_hash = simple_hash("now");
         after_hash = simple_hash("after");
         before_hash = simple_hash("before");
+        status_hash = simple_hash("status");
+        removed_hash = simple_hash("REMOVED");
+        uninitialized_hash = simple_hash("UNINITIALIZED");
+        undefined_hash = simple_hash("UNDEFINED");
+        clear_hash = simple_hash("CLEAR");
+        warning_hash = simple_hash("WARNING");
+        critical_hash = simple_hash("CRITICAL");
     }
 
-    if(v->hash == this_hash && !strcmp(v->name, "this")) {
+    if(unlikely(v->hash == this_hash && !strcmp(v->name, "this"))) {
         n = (exp->this)?*exp->this:NAN;
         buffer_strcat(exp->error_msg, "[ $this = ");
         print_parsed_as_constant(exp->error_msg, n);
@@ -92,7 +99,7 @@ static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABL
         return n;
     }
 
-    if(v->hash == after_hash && !strcmp(v->name, "after")) {
+    if(unlikely(v->hash == after_hash && !strcmp(v->name, "after"))) {
         n = (exp->after && *exp->after)?*exp->after:NAN;
         buffer_strcat(exp->error_msg, "[ $after = ");
         print_parsed_as_constant(exp->error_msg, n);
@@ -100,7 +107,7 @@ static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABL
         return n;
     }
 
-    if(v->hash == before_hash && !strcmp(v->name, "before")) {
+    if(unlikely(v->hash == before_hash && !strcmp(v->name, "before"))) {
         n = (exp->before && *exp->before)?*exp->before:NAN;
         buffer_strcat(exp->error_msg, "[ $before = ");
         print_parsed_as_constant(exp->error_msg, n);
@@ -108,7 +115,7 @@ static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABL
         return n;
     }
 
-    if(v->hash == now_hash && !strcmp(v->name, "now")) {
+    if(unlikely(v->hash == now_hash && !strcmp(v->name, "now"))) {
         n = time(NULL);
         buffer_strcat(exp->error_msg, "[ $now = ");
         print_parsed_as_constant(exp->error_msg, n);
@@ -116,6 +123,62 @@ static inline calculated_number eval_variable(EVAL_EXPRESSION *exp, EVAL_VARIABL
         return n;
     }
 
+    if(unlikely(v->hash == status_hash && !strcmp(v->name, "status"))) {
+        n = (exp->status)?*exp->status:RRDCALC_STATUS_UNINITIALIZED;
+        buffer_strcat(exp->error_msg, "[ $status = ");
+        print_parsed_as_constant(exp->error_msg, n);
+        buffer_strcat(exp->error_msg, " ] ");
+        return n;
+    }
+
+    if(unlikely(v->hash == removed_hash && !strcmp(v->name, "REMOVED"))) {
+        n = RRDCALC_STATUS_REMOVED;
+        buffer_strcat(exp->error_msg, "[ $REMOVED = ");
+        print_parsed_as_constant(exp->error_msg, n);
+        buffer_strcat(exp->error_msg, " ] ");
+        return n;
+    }
+
+    if(unlikely(v->hash == uninitialized_hash && !strcmp(v->name, "UNINITIALIZED"))) {
+        n = RRDCALC_STATUS_UNINITIALIZED;
+        buffer_strcat(exp->error_msg, "[ $UNINITIALIZED = ");
+        print_parsed_as_constant(exp->error_msg, n);
+        buffer_strcat(exp->error_msg, " ] ");
+        return n;
+    }
+
+    if(unlikely(v->hash == undefined_hash && !strcmp(v->name, "UNDEFINED"))) {
+        n = RRDCALC_STATUS_UNDEFINED;
+        buffer_strcat(exp->error_msg, "[ $UNDEFINED = ");
+        print_parsed_as_constant(exp->error_msg, n);
+        buffer_strcat(exp->error_msg, " ] ");
+        return n;
+    }
+
+    if(unlikely(v->hash == clear_hash && !strcmp(v->name, "CLEAR"))) {
+        n = RRDCALC_STATUS_CLEAR;
+        buffer_strcat(exp->error_msg, "[ $CLEAR = ");
+        print_parsed_as_constant(exp->error_msg, n);
+        buffer_strcat(exp->error_msg, " ] ");
+        return n;
+    }
+
+    if(unlikely(v->hash == warning_hash && !strcmp(v->name, "WARNING"))) {
+        n = RRDCALC_STATUS_WARNING;
+        buffer_strcat(exp->error_msg, "[ $WARNING = ");
+        print_parsed_as_constant(exp->error_msg, n);
+        buffer_strcat(exp->error_msg, " ] ");
+        return n;
+    }
+
+    if(unlikely(v->hash == critical_hash && !strcmp(v->name, "CRITICAL"))) {
+        n = RRDCALC_STATUS_CRITICAL;
+        buffer_strcat(exp->error_msg, "[ $CRITICAL = ");
+        print_parsed_as_constant(exp->error_msg, n);
+        buffer_strcat(exp->error_msg, " ] ");
+        return n;
+    }
+
     if(exp->rrdcalc && health_variable_lookup(v->name, v->hash, exp->rrdcalc, &n)) {
         buffer_sprintf(exp->error_msg, "[ $%s = ", v->name);
         print_parsed_as_constant(exp->error_msg, n);
@@ -265,7 +328,6 @@ static struct operator {
         // this is a random access array
         // we always access it with a known EVAL_OPERATOR_X
 
-        [EVAL_OPERATOR_IF_THEN_ELSE]          = { "?",  1, 3, 0, eval_if_then_else },
         [EVAL_OPERATOR_AND]                   = { "&&", 2, 2, 0, eval_and },
         [EVAL_OPERATOR_OR]                    = { "||", 2, 2, 0, eval_or },
         [EVAL_OPERATOR_GREATER_THAN_OR_EQUAL] = { ">=", 3, 2, 0, eval_greater_than_or_equal },
@@ -282,8 +344,9 @@ static struct operator {
         [EVAL_OPERATOR_SIGN_PLUS]             = { "+",  6, 1, 0, eval_sign_plus },
         [EVAL_OPERATOR_SIGN_MINUS]            = { "-",  6, 1, 0, eval_sign_minus },
         [EVAL_OPERATOR_ABS]                   = { "abs(",6,1, 1, eval_abs },
-        [EVAL_OPERATOR_NOP]                   = { NULL, 7, 1, 0, eval_nop },
-        [EVAL_OPERATOR_EXPRESSION_OPEN]       = { NULL, 7, 1, 0, eval_nop },
+        [EVAL_OPERATOR_IF_THEN_ELSE]          = { "?",  7, 3, 0, eval_if_then_else },
+        [EVAL_OPERATOR_NOP]                   = { NULL, 8, 1, 0, eval_nop },
+        [EVAL_OPERATOR_EXPRESSION_OPEN]       = { NULL, 8, 1, 0, eval_nop },
 
         // this should exist in our evaluation list
         [EVAL_OPERATOR_EXPRESSION_CLOSE]      = { NULL, 99, 1, 0, eval_nop }
diff --git a/src/eval.h b/src/eval.h
index b509a9fa8..d68b9af47 100644
--- a/src/eval.h
+++ b/src/eval.h
@@ -14,6 +14,7 @@ typedef struct eval_expression {
     const char *source;
     const char *parsed_as;
 
+    int *status;
     calculated_number *this;
     time_t *after;
     time_t *before;
diff --git a/src/global_statistics.c b/src/global_statistics.c
index f39a4cf25..bb2b1f08f 100644
--- a/src/global_statistics.c
+++ b/src/global_statistics.c
@@ -25,7 +25,7 @@ void finished_web_request_statistics(uint64_t dt,
                                      uint64_t bytes_sent,
                                      uint64_t content_size,
                                      uint64_t compressed_content_size) {
-#ifndef NETDATA_NO_ATOMIC_INSTRUCTIONS
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
     uint64_t old_web_usec_max = global_statistics.web_usec_max;
     while(dt > old_web_usec_max)
         __atomic_compare_exchange(&global_statistics.web_usec_max, &old_web_usec_max, &dt, 1, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
@@ -57,7 +57,7 @@ void finished_web_request_statistics(uint64_t dt,
 }
 
 void web_client_connected(void) {
-#ifndef NETDATA_NO_ATOMIC_INSTRUCTIONS
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
     __atomic_fetch_add(&global_statistics.connected_clients, 1, __ATOMIC_SEQ_CST);
 #else
     if (web_server_mode == WEB_SERVER_MODE_MULTI_THREADED)
@@ -71,7 +71,7 @@ void web_client_connected(void) {
 }
 
 void web_client_disconnected(void) {
-#ifndef NETDATA_NO_ATOMIC_INSTRUCTIONS
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
     __atomic_fetch_sub(&global_statistics.connected_clients, 1, __ATOMIC_SEQ_CST);
 #else
     if (web_server_mode == WEB_SERVER_MODE_MULTI_THREADED)
@@ -86,7 +86,7 @@ void web_client_disconnected(void) {
 
 
 inline void global_statistics_copy(struct global_statistics *gs, uint8_t options) {
-#ifndef NETDATA_NO_ATOMIC_INSTRUCTIONS
+#if defined(HAVE_C___ATOMIC) && !defined(NETDATA_NO_ATOMIC_INSTRUCTIONS)
     gs->connected_clients       = __atomic_fetch_add(&global_statistics.connected_clients, 0, __ATOMIC_SEQ_CST);
     gs->web_requests            = __atomic_fetch_add(&global_statistics.web_requests, 0, __ATOMIC_SEQ_CST);
     gs->web_usec                = __atomic_fetch_add(&global_statistics.web_usec, 0, __ATOMIC_SEQ_CST);
@@ -259,4 +259,4 @@ void global_statistics_charts(void) {
         rrddim_set(stcompression, "savings", compression_ratio);
 
     rrdset_done(stcompression);
-}
\ No newline at end of file
+}
diff --git a/src/health.c b/src/health.c
index 3156cd080..596b143a4 100644
--- a/src/health.c
+++ b/src/health.c
@@ -2,10 +2,179 @@
 
 #define RRDVAR_MAX_LENGTH 1024
 
-static const char *health_default_exec = PLUGINS_DIR "/alarm-email.sh";
+struct health_options {
+    const char *health_default_exec;
+    const char *health_default_recipient;
+    const char *log_filename;
+    FILE *log_fp;
+};
+
+static struct health_options health = {
+    .health_default_exec = PLUGINS_DIR "/alarm-notify.sh",
+    .health_default_recipient = "root",
+    .log_filename = VARLIB_DIR "/health/alarm_log.db",
+    .log_fp = NULL
+};
+
 int health_enabled = 1;
 
 // ----------------------------------------------------------------------------
+// health alarm log load/save
+// no need for locking - only one thread is reading / writing the alarms log
+
+static inline int health_alarm_log_open(void) {
+    if(health.log_fp)
+        fclose(health.log_fp);
+
+    health.log_fp = fopen(health.log_filename, "a");
+
+    if(health.log_fp) {
+        if (setvbuf(health.log_fp, NULL, _IOLBF, 0) != 0)
+            error("Cannot set line buffering on health log file.");
+        return 0;
+    }
+
+    error("Cannot open health log file '%s'. Health data will be lost in case of netdata or server crash.", health.log_filename);
+    return -1;
+}
+
+static inline void health_alarm_log_close(void) {
+    if(health.log_fp) {
+        fclose(health.log_fp);
+        health.log_fp = NULL;
+    }
+}
+
+static inline void health_log_recreate(void) {
+    if(health.log_fp != NULL) {
+        health_alarm_log_close();
+
+        // open it with truncate
+        health.log_fp = fopen(health.log_filename, "w");
+        if(health.log_fp) fclose(health.log_fp);
+        else error("Cannot truncate health log '%s'", health.log_filename);
+
+        health.log_fp = NULL;
+
+        health_alarm_log_open();
+    }
+}
+
+static inline void health_alarm_log_save(RRDHOST *host, ALARM_ENTRY *ae) {
+    (void)host;
+    (void)ae;
+    
+/*    if(likely(health.log_fp)) {
+        if(unlikely(fprintf(health.log_fp, "A\t%s\t%08x\t%08x\t%08x\t%08x\t%08x\t%08x\t%s\t%s\t%s\t%s\t%s\t%08x\n",
+            host->hostname,
+            ae->unique_id,
+            ae->alarm_id,
+            ae->alarm_event_id,
+            (uint32_t)ae->when,
+            (uint32_t)ae->duration,
+            (uint32_t)ae->non_clear_duration,
+            (uint32_t)ae->exec_run_timestamp,
+            ae->name,
+            ae->chart,
+            ae->family,
+            ae->exec,
+            ae->recipient
+            ) < 0))
+            error("Health: failed to save alarm log entry. Health data may be lost in case of abnormal restart.");
+    }
+*/
+}
+
+static inline void health_alarm_log_load(RRDHOST *host) {
+    (void)host;
+
+}
+
+// ----------------------------------------------------------------------------
+// health alarm log management
+
+static inline void health_alarm_log(RRDHOST *host,
+                uint32_t alarm_id, uint32_t alarm_event_id,
+                time_t when,
+                const char *name, const char *chart, const char *family,
+                const char *exec, const char *recipient, time_t duration,
+                calculated_number old_value, calculated_number new_value,
+                int old_status, int new_status,
+                const char *source,
+                const char *units,
+                const char *info,
+                int delay
+) {
+    debug(D_HEALTH, "Health adding alarm log entry with id: %u", host->health_log.next_log_id);
+
+    ALARM_ENTRY *ae = callocz(1, sizeof(ALARM_ENTRY));
+    ae->name = strdupz(name);
+    ae->hash_name = simple_hash(ae->name);
+
+    if(chart) {
+        ae->chart = strdupz(chart);
+        ae->hash_chart = simple_hash(ae->chart);
+    }
+
+    if(family)
+        ae->family = strdupz(family);
+
+    if(exec) ae->exec = strdupz(exec);
+    if(recipient) ae->recipient = strdupz(recipient);
+    if(source) ae->source = strdupz(source);
+    if(units) ae->units = strdupz(units);
+    if(info) ae->info = strdupz(info);
+
+    ae->unique_id = host->health_log.next_log_id++;
+    ae->alarm_id = alarm_id;
+    ae->alarm_event_id = alarm_event_id;
+    ae->when = when;
+    ae->old_value = old_value;
+    ae->new_value = new_value;
+    ae->old_status = old_status;
+    ae->new_status = new_status;
+    ae->duration = duration;
+    ae->delay = delay;
+    ae->delay_up_to_timestamp = when + delay;
+
+    if(ae->old_status == RRDCALC_STATUS_WARNING || ae->old_status == RRDCALC_STATUS_CRITICAL)
+        ae->non_clear_duration += ae->duration;
+
+    // link it
+    pthread_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
+    ae->next = host->health_log.alarms;
+    host->health_log.alarms = ae;
+    host->health_log.count++;
+    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+
+    // match previous alarms
+    pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
+    ALARM_ENTRY *t;
+    for(t = host->health_log.alarms ; t ; t = t->next) {
+        if(t != ae && t->alarm_id == ae->alarm_id) {
+            if(!(t->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED) && !t->updated_by_id) {
+                t->notifications |= HEALTH_ENTRY_NOTIFICATIONS_UPDATED;
+                t->updated_by_id = ae->unique_id;
+                ae->updates_id = t->unique_id;
+
+                if((t->new_status == RRDCALC_STATUS_WARNING || t->new_status == RRDCALC_STATUS_CRITICAL) &&
+                   (t->old_status == RRDCALC_STATUS_WARNING || t->old_status == RRDCALC_STATUS_CRITICAL))
+                    ae->non_clear_duration += t->non_clear_duration;
+
+                health_alarm_log_save(host, t);
+            }
+            else {
+                // no need to continue
+                break;
+            }
+        }
+    }
+    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+
+    health_alarm_log_save(host, ae);
+}
+
+// ----------------------------------------------------------------------------
 // RRDVAR management
 
 static inline int rrdvar_fix_name(char *variable) {
@@ -410,12 +579,15 @@ void rrddimvar_free(RRDDIMVAR *rs) {
 
 static inline const char *rrdcalc_status2string(int status) {
     switch(status) {
-        case RRDCALC_STATUS_UNINITIALIZED:
-            return "UNINITIALIZED";
+        case RRDCALC_STATUS_REMOVED:
+            return "REMOVED";
 
         case RRDCALC_STATUS_UNDEFINED:
             return "UNDEFINED";
 
+        case RRDCALC_STATUS_UNINITIALIZED:
+            return "UNINITIALIZED";
+
         case RRDCALC_STATUS_CLEAR:
             return "CLEAR";
 
@@ -429,6 +601,7 @@ static inline const char *rrdcalc_status2string(int status) {
             return "CRITICAL";
 
         default:
+            error("Unknown alarm status %d", status);
             return "UNKNOWN";
     }
 }
@@ -441,6 +614,10 @@ static void rrdsetcalc_link(RRDSET *st, RRDCALC *rc) {
 
     rc->rrdset_next = st->alarms;
     rc->rrdset_prev = NULL;
+    
+    if(rc->rrdset_next)
+        rc->rrdset_next->rrdset_prev = rc;
+
     st->alarms = rc;
 
     if(rc->update_every < rc->rrdset->update_every) {
@@ -469,6 +646,11 @@ static void rrdsetcalc_link(RRDSET *st, RRDCALC *rc) {
     rc->hostname = rrdvar_create_and_index("host", &st->rrdhost->variables_root_index, fullname, RRDVAR_TYPE_CALCULATED, &rc->value);
 
 	if(!rc->units) rc->units = strdupz(st->units);
+
+    {
+        time_t now = time(NULL);
+        health_alarm_log(st->rrdhost, rc->id, rc->next_event_id++, now, rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->status, RRDCALC_STATUS_UNINITIALIZED, rc->source, rc->units, rc->info, 0);
+    }
 }
 
 static inline int rrdcalc_is_matching_this_rrdset(RRDCALC *rc, RRDSET *st) {
@@ -485,9 +667,10 @@ inline void rrdsetcalc_link_matching(RRDSET *st) {
 
     RRDCALC *rc;
     for(rc = st->rrdhost->alarms; rc ; rc = rc->next) {
-        if(rc->rrdset) continue;
+        if(unlikely(rc->rrdset))
+            continue;
 
-        if(rrdcalc_is_matching_this_rrdset(rc, st))
+        if(unlikely(rrdcalc_is_matching_this_rrdset(rc, st)))
             rrdsetcalc_link(st, rc);
     }
 }
@@ -497,10 +680,16 @@ inline void rrdsetcalc_unlink(RRDCALC *rc) {
     RRDSET *st = rc->rrdset;
 
     if(!st) {
+        debug(D_HEALTH, "Requested to unlink RRDCALC '%s.%s' which is not linked to any RRDSET", rc->chart?rc->chart:"NOCHART", rc->name);
         error("Requested to unlink RRDCALC '%s.%s' which is not linked to any RRDSET", rc->chart?rc->chart:"NOCHART", rc->name);
         return;
     }
 
+    {
+        time_t now = time(NULL);
+        health_alarm_log(st->rrdhost, rc->id, rc->next_event_id++, now, rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->status, RRDCALC_STATUS_REMOVED, rc->source, rc->units, rc->info, 0);
+    }
+
     RRDHOST *host = st->rrdhost;
 
     debug(D_HEALTH, "Health unlinking alarm '%s.%s' from chart '%s' of host '%s'", rc->chart?rc->chart:"NOCHART", rc->name, st->id, host->hostname);
@@ -541,20 +730,29 @@ RRDCALC *rrdcalc_find(RRDSET *st, const char *name) {
     uint32_t hash = simple_hash(name);
 
     for( rc = st->alarms; rc ; rc = rc->rrdset_next ) {
-        if(rc->hash == hash && !strcmp(rc->name, name))
+        if(unlikely(rc->hash == hash && !strcmp(rc->name, name)))
             return rc;
     }
 
     return NULL;
 }
 
-static inline int rrdcalc_exists(RRDHOST *host, const char *name, uint32_t hash) {
+static inline int rrdcalc_exists(RRDHOST *host, const char *chart, const char *name, uint32_t hash_chart, uint32_t hash_name) {
     RRDCALC *rc;
 
+    if(unlikely(!chart)) {
+        error("attempt to find RRDCALC '%s' without giving a chart name", name);
+        return 1;
+    }
+
+    if(unlikely(!hash_chart)) hash_chart = simple_hash(chart);
+    if(unlikely(!hash_name))  hash_name  = simple_hash(name);
+
     // make sure it does not already exist
     for(rc = host->alarms; rc ; rc = rc->next) {
-        if (rc->hash == hash && !strcmp(name, rc->name)) {
-            error("Health alarm '%s' already exists in host '%s'.", name, host->hostname);
+        if (unlikely(rc->chart && rc->hash == hash_name && rc->hash_chart == hash_chart && !strcmp(name, rc->name) && !strcmp(chart, rc->chart))) {
+            debug(D_HEALTH, "Health alarm '%s.%s' already exists in host '%s'.", chart, name, host->hostname);
+            error("Health alarm '%s.%s' already exists in host '%s'.", chart, name, host->hostname);
             return 1;
         }
     }
@@ -562,10 +760,29 @@ static inline int rrdcalc_exists(RRDHOST *host, const char *name, uint32_t hash)
     return 0;
 }
 
+static inline uint32_t rrdcalc_get_unique_id(RRDHOST *host, const char *chart, const char *name, uint32_t *next_event_id) {
+    if(chart && name) {
+        uint32_t hash_chart = simple_hash(chart);
+        uint32_t hash_name = simple_hash(name);
+
+        // re-use old IDs, by looking them up in the alarm log
+        ALARM_ENTRY *ae;
+        for(ae = host->health_log.alarms; ae ;ae = ae->next) {
+            if(unlikely(ae->hash_name == hash_name && ae->hash_chart == hash_chart && !strcmp(name, ae->name) && !strcmp(chart, ae->chart))) {
+                if(next_event_id) *next_event_id = ae->alarm_event_id + 1;
+                return ae->alarm_id;
+            }
+        }
+    }
+
+    return host->health_log.next_alarm_id++;
+}
+
 static inline void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc) {
     rrdhost_check_rdlock(host);
 
     if(rc->calculation) {
+        rc->calculation->status = &rc->status;
         rc->calculation->this = &rc->value;
         rc->calculation->after = &rc->db_after;
         rc->calculation->before = &rc->db_before;
@@ -573,6 +790,7 @@ static inline void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc) {
     }
 
     if(rc->warning) {
+        rc->warning->status = &rc->status;
         rc->warning->this = &rc->value;
         rc->warning->after = &rc->db_after;
         rc->warning->before = &rc->db_before;
@@ -580,6 +798,7 @@ static inline void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc) {
     }
 
     if(rc->critical) {
+        rc->critical->status = &rc->status;
         rc->critical->this = &rc->value;
         rc->critical->after = &rc->db_after;
         rc->critical->before = &rc->db_before;
@@ -587,8 +806,15 @@ static inline void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc) {
     }
 
     // link it to the host
-    rc->next = host->alarms;
-    host->alarms = rc;
+    if(likely(host->alarms)) {
+        // append it
+        RRDCALC *t;
+        for(t = host->alarms; t && t->next ; t = t->next) ;
+        t->next = rc;
+    }
+    else {
+        host->alarms = rc;
+    }
 
     // link it to its chart
     RRDSET *st;
@@ -600,71 +826,66 @@ static inline void rrdcalc_create_part2(RRDHOST *host, RRDCALC *rc) {
     }
 }
 
-static inline uint32_t rrdcalc_fullname(char *fullname, size_t len, const char *chart, const char *name) {
-    snprintfz(fullname, len - 1, "%s%s%s", chart?chart:"", chart?".":"", name);
-    rrdvar_fix_name(fullname);
-    return simple_hash(fullname);
-}
-
-static inline RRDCALC *rrdcalc_create(RRDHOST *host, const char *name, const char *chart, const char *dimensions,
-                        const char *units, const char *info,
-                        int group_method, int after, int before, int update_every, uint32_t options,
-                        calculated_number green, calculated_number red,
-                        const char *exec, const char *source,
-                        const char *calc, const char *warn, const char *crit) {
+static inline RRDCALC *rrdcalc_create(RRDHOST *host, RRDCALCTEMPLATE *rt, const char *chart) {
 
-    char fullname[RRDVAR_MAX_LENGTH + 1];
-    uint32_t hash = rrdcalc_fullname(fullname, RRDVAR_MAX_LENGTH + 1, chart, name);
+    debug(D_HEALTH, "Health creating dynamic alarm (from template) '%s.%s'", chart, rt->name);
 
-    if(rrdcalc_exists(host, fullname, hash))
+    if(rrdcalc_exists(host, chart, rt->name, 0, 0))
         return NULL;
 
     RRDCALC *rc = callocz(1, sizeof(RRDCALC));
-
-    rc->name = strdupz(name);
+    rc->next_event_id = 1;
+    rc->id = rrdcalc_get_unique_id(host, chart, rt->name, &rc->next_event_id);
+    rc->name = strdupz(rt->name);
     rc->hash = simple_hash(rc->name);
-
     rc->chart = strdupz(chart);
     rc->hash_chart = simple_hash(rc->chart);
 
-    if(dimensions) rc->dimensions = strdupz(dimensions);
+    if(rt->dimensions) rc->dimensions = strdupz(rt->dimensions);
 
-    rc->green = green;
-    rc->red = red;
+    rc->green = rt->green;
+    rc->red = rt->red;
     rc->value = NAN;
     rc->old_value = NAN;
 
-    rc->group = group_method;
-    rc->after = after;
-    rc->before = before;
-    rc->update_every = update_every;
-    rc->options = options;
-
-    if(exec) rc->exec = strdupz(exec);
-    if(source) rc->source = strdupz(source);
-    if(units) rc->units = strdupz(units);
-    if(info) rc->info = strdupz(info);
-
-    if(calc) {
-        rc->calculation = expression_parse(calc, NULL, NULL);
+    rc->delay_up_duration = rt->delay_up_duration;
+    rc->delay_down_duration = rt->delay_down_duration;
+    rc->delay_max_duration = rt->delay_max_duration;
+    rc->delay_multiplier = rt->delay_multiplier;
+
+    rc->group = rt->group;
+    rc->after = rt->after;
+    rc->before = rt->before;
+    rc->update_every = rt->update_every;
+    rc->options = rt->options;
+
+    if(rt->exec) rc->exec = strdupz(rt->exec);
+    if(rt->recipient) rc->recipient = strdupz(rt->recipient);
+    if(rt->source) rc->source = strdupz(rt->source);
+    if(rt->units) rc->units = strdupz(rt->units);
+    if(rt->info) rc->info = strdupz(rt->info);
+
+    if(rt->calculation) {
+        rc->calculation = expression_parse(rt->calculation->source, NULL, NULL);
         if(!rc->calculation)
-            error("Health alarm '%s.%s': failed to parse calculation expression '%s'", chart, name, calc);
+            error("Health alarm '%s.%s': failed to parse calculation expression '%s'", chart, rt->name, rt->calculation->source);
     }
-    if(warn) {
-        rc->warning = expression_parse(warn, NULL, NULL);
+    if(rt->warning) {
+        rc->warning = expression_parse(rt->warning->source, NULL, NULL);
         if(!rc->warning)
-            error("Health alarm '%s.%s': failed to re-parse warning expression '%s'", chart, name, warn);
+            error("Health alarm '%s.%s': failed to re-parse warning expression '%s'", chart, rt->name, rt->warning->source);
     }
-    if(crit) {
-        rc->critical = expression_parse(crit, NULL, NULL);
+    if(rt->critical) {
+        rc->critical = expression_parse(rt->critical->source, NULL, NULL);
         if(!rc->critical)
-            error("Health alarm '%s.%s': failed to re-parse critical expression '%s'", chart, name, crit);
+            error("Health alarm '%s.%s': failed to re-parse critical expression '%s'", chart, rt->name, rt->critical->source);
     }
 
-    debug(D_HEALTH, "Health runtime added alarm '%s.%s': exec '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s",
+    debug(D_HEALTH, "Health runtime added alarm '%s.%s': exec '%s', recipient '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
           (rc->chart)?rc->chart:"NOCHART",
           rc->name,
           (rc->exec)?rc->exec:"DEFAULT",
+          (rc->recipient)?rc->recipient:"DEFAULT",
           rc->green,
           rc->red,
           rc->group,
@@ -676,7 +897,11 @@ static inline RRDCALC *rrdcalc_create(RRDHOST *host, const char *name, const cha
           (rc->calculation)?rc->calculation->parsed_as:"NONE",
           (rc->warning)?rc->warning->parsed_as:"NONE",
           (rc->critical)?rc->critical->parsed_as:"NONE",
-          rc->source
+          rc->source,
+          rc->delay_up_duration,
+          rc->delay_down_duration,
+          rc->delay_max_duration,
+          rc->delay_multiplier
     );
 
     rrdcalc_create_part2(host, rc);
@@ -692,14 +917,13 @@ void rrdcalc_free(RRDHOST *host, RRDCALC *rc) {
     if(rc->rrdset) rrdsetcalc_unlink(rc);
 
     // unlink it from RRDHOST
-    if(rc == host->alarms)
+    if(unlikely(rc == host->alarms))
         host->alarms = rc->next;
 
-    else if(host->alarms) {
+    else if(likely(host->alarms)) {
         RRDCALC *t, *last = host->alarms;
-
         for(t = last->next; t && t != rc; last = t, t = t->next) ;
-        if(last && last->next == rc)
+        if(last->next == rc)
             last->next = rc->next;
         else
             error("Cannot unlink alarm '%s.%s' from host '%s': not found", rc->chart?rc->chart:"NOCHART", rc->name, host->hostname);
@@ -716,6 +940,7 @@ void rrdcalc_free(RRDHOST *host, RRDCALC *rc) {
     freez(rc->family);
     freez(rc->dimensions);
     freez(rc->exec);
+    freez(rc->recipient);
     freez(rc->source);
     freez(rc->units);
     freez(rc->info);
@@ -730,22 +955,13 @@ void rrdcalctemplate_link_matching(RRDSET *st) {
 
     for(rt = st->rrdhost->templates; rt ; rt = rt->next) {
         if(rt->hash_context == st->hash_context && !strcmp(rt->context, st->context)) {
-
-            RRDCALC *rc = rrdcalc_create(st->rrdhost, rt->name, st->id,
-                           rt->dimensions, rt->units, rt->info, rt->group, rt->after, rt->before, rt->update_every, rt->options,
-                           rt->green, rt->red, rt->exec, rt->source,
-                           (rt->calculation)?rt->calculation->source:NULL,
-                           (rt->warning)?rt->warning->source:NULL,
-                           (rt->critical)?rt->critical->source:NULL);
-
-            if(!rc)
+            RRDCALC *rc = rrdcalc_create(st->rrdhost, rt, st->id);
+            if(unlikely(!rc))
                 error("Health tried to create alarm from template '%s', but it failed", rt->name);
 
 #ifdef NETDATA_INTERNAL_CHECKS
             else if(rc->rrdset != st)
                 error("Health alarm '%s.%s' should be linked to chart '%s', but it is not", rc->chart?rc->chart:"NOCHART", rc->name, st->id);
-#else
-            (void)rc;
 #endif
         }
     }
@@ -776,6 +992,7 @@ static inline void rrdcalctemplate_free(RRDHOST *host, RRDCALCTEMPLATE *rt) {
 
     freez(rt->name);
     freez(rt->exec);
+    freez(rt->recipient);
     freez(rt->context);
     freez(rt->source);
     freez(rt->units);
@@ -800,18 +1017,12 @@ static inline void rrdcalctemplate_free(RRDHOST *host, RRDCALCTEMPLATE *rt) {
 #define HEALTH_WARN_KEY "warn"
 #define HEALTH_CRIT_KEY "crit"
 #define HEALTH_EXEC_KEY "exec"
+#define HEALTH_RECIPIENT_KEY "to"
 #define HEALTH_UNITS_KEY "units"
 #define HEALTH_INFO_KEY "info"
+#define HEALTH_DELAY_KEY "delay"
 
 static inline int rrdcalc_add_alarm_from_config(RRDHOST *host, RRDCALC *rc) {
-    {
-        char fullname[RRDVAR_MAX_LENGTH + 1];
-        uint32_t hash = rrdcalc_fullname(fullname, RRDVAR_MAX_LENGTH + 1, rc->chart, rc->name);
-
-        if (rrdcalc_exists(host, fullname, hash))
-            return 0;
-    }
-
     if(!rc->chart) {
         error("Health configuration for alarm '%s' does not have a chart", rc->name);
         return 0;
@@ -827,10 +1038,17 @@ static inline int rrdcalc_add_alarm_from_config(RRDHOST *host, RRDCALC *rc) {
         return 0;
     }
 
-    debug(D_HEALTH, "Health configuration adding alarm '%s.%s': exec '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s",
+    if (rrdcalc_exists(host, rc->chart, rc->name, rc->hash_chart, rc->hash))
+        return 0;
+
+    rc->id = rrdcalc_get_unique_id(&localhost, rc->chart, rc->name, &rc->next_event_id);
+
+    debug(D_HEALTH, "Health configuration adding alarm '%s.%s' (%u): exec '%s', recipient '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
           rc->chart?rc->chart:"NOCHART",
           rc->name,
+          rc->id,
           (rc->exec)?rc->exec:"DEFAULT",
+          (rc->recipient)?rc->recipient:"DEFAULT",
           rc->green,
           rc->red,
           rc->group,
@@ -842,7 +1060,11 @@ static inline int rrdcalc_add_alarm_from_config(RRDHOST *host, RRDCALC *rc) {
           (rc->calculation)?rc->calculation->parsed_as:"NONE",
           (rc->warning)?rc->warning->parsed_as:"NONE",
           (rc->critical)?rc->critical->parsed_as:"NONE",
-          rc->source
+          rc->source,
+          rc->delay_up_duration,
+          rc->delay_down_duration,
+          rc->delay_max_duration,
+          rc->delay_multiplier
     );
 
     rrdcalc_create_part2(host, rc);
@@ -850,33 +1072,34 @@ static inline int rrdcalc_add_alarm_from_config(RRDHOST *host, RRDCALC *rc) {
 }
 
 static inline int rrdcalctemplate_add_template_from_config(RRDHOST *host, RRDCALCTEMPLATE *rt) {
-    if(!rt->context) {
+    if(unlikely(!rt->context)) {
         error("Health configuration for template '%s' does not have a context", rt->name);
         return 0;
     }
 
-    if(!rt->update_every) {
+    if(unlikely(!rt->update_every)) {
         error("Health configuration for template '%s' has no frequency (parameter 'every'). Ignoring it.", rt->name);
         return 0;
     }
 
-    if(!RRDCALCTEMPLATE_HAS_CALCULATION(rt) && !rt->warning && !rt->critical) {
+    if(unlikely(!RRDCALCTEMPLATE_HAS_CALCULATION(rt) && !rt->warning && !rt->critical)) {
         error("Health configuration for template '%s' is useless (no calculation, no warning and no critical evaluation)", rt->name);
         return 0;
     }
 
-    RRDCALCTEMPLATE *t;
-    for (t = host->templates; t ; t = t->next) {
-        if(t->hash_name == rt->hash_name && !strcmp(t->name, rt->name)) {
+    RRDCALCTEMPLATE *t, *last = NULL;
+    for (t = host->templates; t ; last = t, t = t->next) {
+        if(unlikely(t->hash_name == rt->hash_name && !strcmp(t->name, rt->name))) {
             error("Health configuration template '%s' already exists for host '%s'.", rt->name, host->hostname);
             return 0;
         }
     }
 
-    debug(D_HEALTH, "Health configuration adding template '%s': context '%s', exec '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s'",
+    debug(D_HEALTH, "Health configuration adding template '%s': context '%s', exec '%s', recipient '%s', green %Lf, red %Lf, lookup: group %d, after %d, before %d, options %u, dimensions '%s', update every %d, calculation '%s', warning '%s', critical '%s', source '%s', delay up %d, delay down %d, delay max %d, delay_multiplier %f",
           rt->name,
           (rt->context)?rt->context:"NONE",
           (rt->exec)?rt->exec:"DEFAULT",
+          (rt->recipient)?rt->recipient:"DEFAULT",
           rt->green,
           rt->red,
           rt->group,
@@ -888,11 +1111,21 @@ static inline int rrdcalctemplate_add_template_from_config(RRDHOST *host, RRDCAL
           (rt->calculation)?rt->calculation->parsed_as:"NONE",
           (rt->warning)?rt->warning->parsed_as:"NONE",
           (rt->critical)?rt->critical->parsed_as:"NONE",
-          rt->source
+          rt->source,
+          rt->delay_up_duration,
+          rt->delay_down_duration,
+          rt->delay_max_duration,
+          rt->delay_multiplier
     );
 
-    rt->next = host->templates;
-    host->templates = rt;
+    if(likely(last)) {
+        last->next = rt;
+    }
+    else {
+        rt->next = host->templates;
+        host->templates = rt;
+    }
+
     return 1;
 }
 
@@ -938,6 +1171,86 @@ static inline int health_parse_duration(char *string, int *result) {
     return 1;
 }
 
+static inline int health_parse_delay(
+        size_t line, const char *path, const char *file, char *string,
+        int *delay_up_duration,
+        int *delay_down_duration,
+        int *delay_max_duration,
+        float *delay_multiplier) {
+
+    char given_up = 0;
+    char given_down = 0;
+    char given_max = 0;
+    char given_multiplier = 0;
+
+    char *s = string;
+    while(*s) {
+        char *key = s;
+
+        while(*s && !isspace(*s)) s++;
+        while(*s && isspace(*s)) *s++ = '\0';
+
+        if(!*key) break;
+
+        char *value = s;
+        while(*s && !isspace(*s)) s++;
+        while(*s && isspace(*s)) *s++ = '\0';
+
+        if(!strcasecmp(key, "up")) {
+            if (!health_parse_duration(value, delay_up_duration)) {
+                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
+                      line, path, file, value, key);
+            }
+            else given_up = 1;
+        }
+        else if(!strcasecmp(key, "down")) {
+            if (!health_parse_duration(value, delay_down_duration)) {
+                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
+                      line, path, file, value, key);
+            }
+            else given_down = 1;
+        }
+        else if(!strcasecmp(key, "multiplier")) {
+            *delay_multiplier = strtof(value, NULL);
+            if(isnan(*delay_multiplier) || isinf(*delay_multiplier) || islessequal(*delay_multiplier, 0)) {
+                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
+                      line, path, file, value, key);
+            }
+            else given_multiplier = 1;
+        }
+        else if(!strcasecmp(key, "max")) {
+            if (!health_parse_duration(value, delay_max_duration)) {
+                error("Health configuration at line %zu of file '%s/%s': invalid value '%s' for '%s' keyword",
+                      line, path, file, value, key);
+            }
+            else given_max = 1;
+        }
+        else {
+            error("Health configuration at line %zu of file '%s/%s': unknown keyword '%s'",
+                  line, path, file, key);
+        }
+    }
+
+    if(!given_up)
+        *delay_up_duration = 0;
+
+    if(!given_down)
+        *delay_down_duration = 0;
+
+    if(!given_multiplier)
+        *delay_multiplier = 1.0;
+
+    if(!given_max) {
+        if((*delay_max_duration) < (*delay_up_duration) * (*delay_multiplier))
+            *delay_max_duration = (*delay_up_duration) * (*delay_multiplier);
+
+        if((*delay_max_duration) < (*delay_down_duration) * (*delay_multiplier))
+            *delay_max_duration = (*delay_down_duration) * (*delay_multiplier);
+    }
+
+    return 1;
+}
+
 static inline int health_parse_db_lookup(
         size_t line, const char *path, const char *file, char *string,
         int *group_method, int *after, int *before, int *every,
@@ -1056,7 +1369,7 @@ static inline void strip_quotes(char *s) {
 int health_readfile(const char *path, const char *filename) {
     debug(D_HEALTH, "Health configuration reading file '%s/%s'", path, filename);
 
-    static uint32_t hash_alarm = 0, hash_template = 0, hash_on = 0, hash_calc = 0, hash_green = 0, hash_red = 0, hash_warn = 0, hash_crit = 0, hash_exec = 0, hash_every = 0, hash_lookup = 0, hash_units = 0, hash_info = 0;
+    static uint32_t hash_alarm = 0, hash_template = 0, hash_on = 0, hash_calc = 0, hash_green = 0, hash_red = 0, hash_warn = 0, hash_crit = 0, hash_exec = 0, hash_every = 0, hash_lookup = 0, hash_units = 0, hash_info = 0, hash_recipient = 0, hash_delay = 0;
     char buffer[HEALTH_CONF_MAX_LINE + 1];
 
     if(unlikely(!hash_alarm)) {
@@ -1073,6 +1386,8 @@ int health_readfile(const char *path, const char *filename) {
         hash_every = simple_uhash(HEALTH_EVERY_KEY);
         hash_units = simple_hash(HEALTH_UNITS_KEY);
         hash_info = simple_hash(HEALTH_INFO_KEY);
+        hash_recipient = simple_hash(HEALTH_RECIPIENT_KEY);
+        hash_delay = simple_uhash(HEALTH_DELAY_KEY);
     }
 
     snprintfz(buffer, HEALTH_CONF_MAX_LINE, "%s/%s", path, filename);
@@ -1144,6 +1459,7 @@ int health_readfile(const char *path, const char *filename) {
             }
 
             rc = callocz(1, sizeof(RRDCALC));
+            rc->next_event_id = 1;
             rc->name = strdupz(value);
             rc->hash = simple_hash(rc->name);
             rc->source = health_source_file(line, path, filename);
@@ -1151,6 +1467,7 @@ int health_readfile(const char *path, const char *filename) {
             rc->red = NAN;
             rc->value = NAN;
             rc->old_value = NAN;
+            rc->delay_multiplier = 1.0;
 
             if(rrdvar_fix_name(rc->name))
                 error("Health configuration renamed alarm '%s' to '%s'", value, rc->name);
@@ -1171,6 +1488,7 @@ int health_readfile(const char *path, const char *filename) {
             rt->source = health_source_file(line, path, filename);
             rt->green = NAN;
             rt->red = NAN;
+            rt->delay_multiplier = 1.0;
 
             if(rrdvar_fix_name(rt->name))
                 error("Health configuration renamed template '%s' to '%s'", value, rt->name);
@@ -1250,6 +1568,16 @@ int health_readfile(const char *path, const char *filename) {
                 }
                 rc->exec = strdupz(value);
             }
+            else if(hash == hash_recipient && !strcasecmp(key, HEALTH_RECIPIENT_KEY)) {
+                if(rc->recipient) {
+                    if(strcmp(rc->recipient, value))
+                        info("Health configuration at line %zu of file '%s/%s' for alarm '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
+                             line, path, filename, rc->name, key, rc->recipient, value, value);
+
+                    freez(rc->recipient);
+                }
+                rc->recipient = strdupz(value);
+            }
             else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
                 if(rc->units) {
                     if(strcmp(rc->units, value))
@@ -1272,6 +1600,9 @@ int health_readfile(const char *path, const char *filename) {
                 rc->info = strdupz(value);
                 strip_quotes(rc->info);
             }
+            else if(hash == hash_delay && !strcasecmp(key, HEALTH_DELAY_KEY)) {
+                health_parse_delay(line, path, filename, value, &rc->delay_up_duration, &rc->delay_down_duration, &rc->delay_max_duration, &rc->delay_multiplier);
+            }
             else {
                 error("Health configuration at line %zu of file '%s/%s' for alarm '%s' has unknown key '%s'.",
                      line, path, filename, rc->name, key);
@@ -1352,6 +1683,16 @@ int health_readfile(const char *path, const char *filename) {
                 }
                 rt->exec = strdupz(value);
             }
+            else if(hash == hash_recipient && !strcasecmp(key, HEALTH_RECIPIENT_KEY)) {
+                if(rt->recipient) {
+                    if(strcmp(rt->recipient, value))
+                        info("Health configuration at line %zu of file '%s/%s' for template '%s' has key '%s' twice, once with value '%s' and later with value '%s'. Using ('%s').",
+                             line, path, filename, rt->name, key, rt->recipient, value, value);
+
+                    freez(rt->recipient);
+                }
+                rt->recipient = strdupz(value);
+            }
             else if(hash == hash_units && !strcasecmp(key, HEALTH_UNITS_KEY)) {
                 if(rt->units) {
                     if(strcmp(rt->units, value))
@@ -1374,6 +1715,9 @@ int health_readfile(const char *path, const char *filename) {
                 rt->info = strdupz(value);
                 strip_quotes(rt->info);
             }
+            else if(hash == hash_delay && !strcasecmp(key, HEALTH_DELAY_KEY)) {
+                health_parse_delay(line, path, filename, value, &rt->delay_up_duration, &rt->delay_down_duration, &rt->delay_max_duration, &rt->delay_multiplier);
+            }
             else {
                 error("Health configuration at line %zu of file '%s/%s' for template '%s' has unknown key '%s'.",
                       line, path, filename, rt->name, key);
@@ -1414,8 +1758,10 @@ void health_readdir(const char *path) {
            && (
                    (de->d_name[0] == '.' && de->d_name[1] == '\0')
                    || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')
-           ))
+           )) {
+            debug(D_HEALTH, "Ignoring directory '%s'", de->d_name);
             continue;
+        }
 
         else if(de->d_type == DT_DIR) {
             char *s = mallocz(pathlen + strlen(de->d_name) + 2);
@@ -1427,10 +1773,12 @@ void health_readdir(const char *path) {
             continue;
         }
 
-        else if((de->d_type == DT_LNK || de->d_type == DT_REG) &&
+        else if((de->d_type == DT_LNK || de->d_type == DT_REG || de->d_type == DT_UNKNOWN) &&
                 len > 5 && !strcmp(&de->d_name[len - 5], ".conf")) {
             health_readfile(path, de->d_name);
         }
+
+        else debug(D_HEALTH, "Ignoring file '%s'", de->d_name);
     }
 
     closedir(dir);
@@ -1450,16 +1798,18 @@ void health_init(void) {
         return;
     }
 
+    health_alarm_log_load(&localhost);
+
     char *path = health_config_dir();
 
     {
         char buffer[FILENAME_MAX + 1];
-        snprintfz(buffer, FILENAME_MAX, "%s/alarm-email.sh", config_get("global", "plugins directory", PLUGINS_DIR));
-        health_default_exec = config_get("health", "script to execute on alarm", buffer);
+        snprintfz(buffer, FILENAME_MAX, "%s/alarm-notify.sh", config_get("global", "plugins directory", PLUGINS_DIR));
+        health.health_default_exec = config_get("health", "script to execute on alarm", buffer);
     }
 
     long n = config_get_number("health", "in memory max health log entries", (long)localhost.health_log.max);
-    if(n < 2) {
+    if(n < 10) {
         error("Health configuration has invalid max log entries %ld. Using default %u", n, localhost.health_log.max);
         config_set_number("health", "in memory max health log entries", (long)localhost.health_log.max);
     }
@@ -1480,35 +1830,47 @@ static inline void health_string2json(BUFFER *wb, const char *prefix, const char
         buffer_sprintf(wb, "%s\"%s\":null%s", prefix, label, suffix);
 }
 
-static inline void health_alarm_entry2json_nolock(BUFFER *wb, ALARM_ENTRY *ae) {
+static inline void health_alarm_entry2json_nolock(BUFFER *wb, ALARM_ENTRY *ae, RRDHOST *host) {
     buffer_sprintf(wb, "\n\t{\n"
-                           "\t\t\"id\":%u,\n"
-                           "\t\t\"name\":\"%s\",\n"
-                           "\t\t\"chart\":\"%s\",\n"
-                           "\t\t\"family\":\"%s\",\n"
-                           "\t\t\"processed\":%s,\n"
-                           "\t\t\"updated\":%s,\n"
-                           "\t\t\"exec_run\":%s,\n"
-                           "\t\t\"exec_failed\":%s,\n"
-                           "\t\t\"exec\":\"%s\",\n"
-                           "\t\t\"exec_code\":%d,\n"
-                           "\t\t\"source\":\"%s\",\n"
-                           "\t\t\"units\":\"%s\",\n"
-                           "\t\t\"info\":\"%s\",\n"
-                           "\t\t\"when\":%lu,\n"
-                           "\t\t\"duration\":%lu,\n"
-                           "\t\t\"non_clear_duration\":%lu,\n"
-                           "\t\t\"status\":\"%s\",\n"
-                           "\t\t\"old_status\":\"%s\",\n",
-                   ae->id,
+                           "\t\t\"hostname\": \"%s\",\n"
+                           "\t\t\"unique_id\": %u,\n"
+                           "\t\t\"alarm_id\": %u,\n"
+                           "\t\t\"alarm_event_id\": %u,\n"
+                           "\t\t\"name\": \"%s\",\n"
+                           "\t\t\"chart\": \"%s\",\n"
+                           "\t\t\"family\": \"%s\",\n"
+                           "\t\t\"processed\": %s,\n"
+                           "\t\t\"updated\": %s,\n"
+                           "\t\t\"exec_run\": %lu,\n"
+                           "\t\t\"exec_failed\": %s,\n"
+                           "\t\t\"exec\": \"%s\",\n"
+                           "\t\t\"recipient\": \"%s\",\n"
+                           "\t\t\"exec_code\": %d,\n"
+                           "\t\t\"source\": \"%s\",\n"
+                           "\t\t\"units\": \"%s\",\n"
+                           "\t\t\"info\": \"%s\",\n"
+                           "\t\t\"when\": %lu,\n"
+                           "\t\t\"duration\": %lu,\n"
+                           "\t\t\"non_clear_duration\": %lu,\n"
+                           "\t\t\"status\": \"%s\",\n"
+                           "\t\t\"old_status\": \"%s\",\n"
+                           "\t\t\"delay\": %d,\n"
+                           "\t\t\"delay_up_to_timestamp\": %lu,\n"
+                           "\t\t\"updated_by_id\": %u,\n"
+                           "\t\t\"updates_id\": %u,\n",
+                   host->hostname,
+                   ae->unique_id,
+                   ae->alarm_id,
+                   ae->alarm_event_id,
                    ae->name,
                    ae->chart,
                    ae->family,
                    (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_PROCESSED)?"true":"false",
                    (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED)?"true":"false",
-                   (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_EXEC_RUN)?"true":"false",
+                   (unsigned long)ae->exec_run_timestamp,
                    (ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_EXEC_FAILED)?"true":"false",
-                   ae->exec?ae->exec:health_default_exec,
+                   ae->exec?ae->exec:health.health_default_exec,
+                   ae->recipient?ae->recipient:health.health_default_recipient,
                    ae->exec_code,
                    ae->source,
                    ae->units?ae->units:"",
@@ -1517,7 +1879,11 @@ static inline void health_alarm_entry2json_nolock(BUFFER *wb, ALARM_ENTRY *ae) {
                    (unsigned long)ae->duration,
                    (unsigned long)ae->non_clear_duration,
                    rrdcalc_status2string(ae->new_status),
-                   rrdcalc_status2string(ae->old_status)
+                   rrdcalc_status2string(ae->old_status),
+                   ae->delay,
+                   (unsigned long)ae->delay_up_to_timestamp,
+                   ae->updated_by_id,
+                   ae->updates_id
     );
 
     buffer_strcat(wb, "\t\t\"value\":");
@@ -1531,7 +1897,7 @@ static inline void health_alarm_entry2json_nolock(BUFFER *wb, ALARM_ENTRY *ae) {
     buffer_strcat(wb, "\t}");
 }
 
-void health_alarm_log2json(RRDHOST *host, BUFFER *wb) {
+void health_alarm_log2json(RRDHOST *host, BUFFER *wb, uint32_t after) {
     pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
 
     buffer_strcat(wb, "[");
@@ -1540,8 +1906,10 @@ void health_alarm_log2json(RRDHOST *host, BUFFER *wb) {
     unsigned int count = 0;
     ALARM_ENTRY *ae;
     for(ae = host->health_log.alarms; ae && count < max ; count++, ae = ae->next) {
-        if(likely(count)) buffer_strcat(wb, ",");
-        health_alarm_entry2json_nolock(wb, ae);
+        if(ae->unique_id > after) {
+            if(likely(count)) buffer_strcat(wb, ",");
+            health_alarm_entry2json_nolock(wb, ae, host);
+        }
     }
 
     buffer_strcat(wb, "\n]\n");
@@ -1552,11 +1920,13 @@ void health_alarm_log2json(RRDHOST *host, BUFFER *wb) {
 static inline void health_rrdcalc2json_nolock(BUFFER *wb, RRDCALC *rc) {
     buffer_sprintf(wb,
            "\t\t\"%s.%s\": {\n"
+                   "\t\t\t\"id\": %lu,\n"
                    "\t\t\t\"name\": \"%s\",\n"
                    "\t\t\t\"chart\": \"%s\",\n"
                    "\t\t\t\"family\": \"%s\",\n"
                    "\t\t\t\"active\": %s,\n"
                    "\t\t\t\"exec\": \"%s\",\n"
+                   "\t\t\t\"recipient\": \"%s\",\n"
                    "\t\t\t\"source\": \"%s\",\n"
                    "\t\t\t\"units\": \"%s\",\n"
                    "\t\t\t\"info\": \"%s\",\n"
@@ -1565,12 +1935,20 @@ static inline void health_rrdcalc2json_nolock(BUFFER *wb, RRDCALC *rc) {
                    "\t\t\t\"last_updated\": %lu,\n"
                    "\t\t\t\"next_update\": %lu,\n"
                    "\t\t\t\"update_every\": %d,\n"
+                   "\t\t\t\"delay_up_duration\": %d,\n"
+                   "\t\t\t\"delay_down_duration\": %d,\n"
+                   "\t\t\t\"delay_max_duration\": %d,\n"
+                   "\t\t\t\"delay_multiplier\": %f,\n"
+                   "\t\t\t\"delay\": %d,\n"
+                   "\t\t\t\"delay_up_to_timestamp\": %lu,\n"
             , rc->chart, rc->name
+            , (unsigned long)rc->id
             , rc->name
             , rc->chart
             , (rc->rrdset && rc->rrdset->family)?rc->rrdset->family:""
             , (rc->rrdset)?"true":"false"
-            , rc->exec?rc->exec:health_default_exec
+            , rc->exec?rc->exec:health.health_default_exec
+            , rc->recipient?rc->recipient:health.health_default_recipient
             , rc->source
             , rc->units?rc->units:""
             , rc->info?rc->info:""
@@ -1579,6 +1957,12 @@ static inline void health_rrdcalc2json_nolock(BUFFER *wb, RRDCALC *rc) {
             , (unsigned long)rc->last_updated
             , (unsigned long)rc->next_update
             , rc->update_every
+            , rc->delay_up_duration
+            , rc->delay_down_duration
+            , rc->delay_max_duration
+            , rc->delay_multiplier
+            , rc->delay_last
+            , (unsigned long)rc->delay_up_to_timestamp
     );
 
     if(RRDCALC_HAS_DB_LOOKUP(rc)) {
@@ -1638,15 +2022,24 @@ static inline void health_rrdcalc2json_nolock(BUFFER *wb, RRDCALC *rc) {
 
 void health_alarms2json(RRDHOST *host, BUFFER *wb, int all) {
     int i;
+
     rrdhost_rdlock(&localhost);
+    buffer_sprintf(wb, "{\n\t\"hostname\": \"%s\","
+                        "\n\t\"latest_alarm_log_unique_id\": %u,"
+                        "\n\t\"status\": %s,"
+                        "\n\t\"now\": %lu,"
+                        "\n\t\"alarms\": {\n",
+                        host->hostname,
+                        (host->health_log.next_log_id > 0)?(host->health_log.next_log_id - 1):0,
+                        health_enabled?"true":"false",
+                        (unsigned long)time(NULL));
 
-    buffer_strcat(wb, "{\n\t\"alarms\": {\n");
     RRDCALC *rc;
     for(i = 0, rc = host->alarms; rc ; rc = rc->next) {
-        if(!rc->rrdset)
+        if(unlikely(!rc->rrdset || !rc->rrdset->last_collected_time.tv_sec))
             continue;
 
-        if(!all && !(rc->status == RRDCALC_STATUS_WARNING || rc->status == RRDCALC_STATUS_CRITICAL))
+        if(likely(!all && !(rc->status == RRDCALC_STATUS_WARNING || rc->status == RRDCALC_STATUS_CRITICAL)))
             continue;
 
         if(likely(i)) buffer_strcat(wb, ",\n");
@@ -1655,12 +2048,11 @@ void health_alarms2json(RRDHOST *host, BUFFER *wb, int all) {
     }
 
 //    buffer_strcat(wb, "\n\t},\n\t\"templates\": {");
-
 //    RRDCALCTEMPLATE *rt;
 //    for(rt = host->templates; rt ; rt = rt->next)
 //        health_rrdcalctemplate2json_nolock(wb, rt);
 
-    buffer_sprintf(wb, "\n\t},\n\t\"now\": %lu\n}\n", (unsigned long)time(NULL));
+    buffer_strcat(wb, "\n\t}\n}\n");
     rrdhost_unlock(&localhost);
 }
 
@@ -1684,20 +2076,31 @@ void health_reload(void) {
 
     char *path = health_config_dir();
 
+    // free all running alarms
     rrdhost_rwlock(&localhost);
     health_free_all_nolock(&localhost);
     rrdhost_unlock(&localhost);
 
+    // invalidate all previous entries in the alarm log
+    ALARM_ENTRY *t;
+    for(t = localhost.health_log.alarms ; t ; t = t->next) {
+        if(t->new_status != RRDCALC_STATUS_REMOVED)
+            t->notifications |= HEALTH_ENTRY_NOTIFICATIONS_UPDATED;
+    }
+
+    // reset all thresholds to all charts
     RRDSET *st;
     for(st = localhost.rrdset_root; st ; st = st->next) {
         st->green = NAN;
         st->red = NAN;
     }
 
+    // load the new alarms
     rrdhost_rwlock(&localhost);
     health_readdir(path);
     rrdhost_unlock(&localhost);
 
+    // link the loaded alarms to their charts
     for(st = localhost.rrdset_root; st ; st = st->next) {
         rrdhost_rwlock(&localhost);
 
@@ -1708,50 +2111,54 @@ void health_reload(void) {
     }
 }
 
-
 // ----------------------------------------------------------------------------
 // health main thread and friends
 
-static inline int rrdcalc_isrunnable(RRDCALC *rc, time_t now, time_t *next_run) {
-    if (unlikely(!rc->rrdset)) {
-        debug(D_HEALTH, "Health not running alarm '%s.%s'. It is not linked to a chart.", rc->chart?rc->chart:"NOCHART", rc->name);
-        return 0;
-    }
-
-    if (unlikely(!rc->update_every)) {
-        debug(D_HEALTH, "Health not running alarm '%s.%s'. It does not have an update frequency", rc->chart?rc->chart:"NOCHART", rc->name);
-        return 0;
-    }
-
-    if (unlikely(rc->next_update > now)) {
-        if (*next_run > rc->next_update)
-            *next_run = rc->next_update;
-
-        debug(D_HEALTH, "Health not examining alarm '%s.%s' yet (will do in %d secs).", rc->chart?rc->chart:"NOCHART", rc->name, (int) (rc->next_update - now));
-        return 0;
-    }
-
-    return 1;
-}
-
 static inline int rrdcalc_value2status(calculated_number n) {
     if(isnan(n)) return RRDCALC_STATUS_UNDEFINED;
     if(n) return RRDCALC_STATUS_RAISED;
     return RRDCALC_STATUS_CLEAR;
 }
 
-static inline void health_alarm_execute(ALARM_ENTRY *ae) {
-    if(ae->old_status == RRDCALC_STATUS_UNINITIALIZED && ae->new_status == RRDCALC_STATUS_CLEAR)
-        return;
+static inline void health_alarm_execute(RRDHOST *host, ALARM_ENTRY *ae) {
+    ae->notifications |= HEALTH_ENTRY_NOTIFICATIONS_PROCESSED;
+
+    // find the previous notification for the same alarm
+    ALARM_ENTRY *t;
+    for(t = ae->next; t ;t = t->next) {
+        if(t->alarm_id == ae->alarm_id && t->notifications & HEALTH_ENTRY_NOTIFICATIONS_EXEC_RUN)
+            break;
+    }
+
+    if(t && t->new_status == ae->new_status) {
+        // don't send the same notification again
+        info("Health not sending again notification for alarm '%s.%s' status %s", ae->chart, ae->name, rrdcalc_status2string(ae->new_status));
+        goto done;
+    }
+
+    if((ae->old_status == RRDCALC_STATUS_UNDEFINED && ae->new_status == RRDCALC_STATUS_UNINITIALIZED)
+        || (ae->old_status == RRDCALC_STATUS_UNINITIALIZED && ae->new_status == RRDCALC_STATUS_CLEAR)) {
+        info("Health not sending notification for first initialization of alarm '%s.%s' status %s", ae->chart, ae->name, rrdcalc_status2string(ae->new_status));
+        goto done;
+    }
 
     char buffer[FILENAME_MAX + 1];
     pid_t command_pid;
 
     const char *exec = ae->exec;
-    if(!exec) exec = health_default_exec;
+    if(!exec) exec = health.health_default_exec;
 
-    snprintfz(buffer, FILENAME_MAX, "exec %s '%s' '%s' '%s' '%s' '%s' '%0.0Lf' '%0.0Lf' '%s' '%u' '%u' '%s' '%s'",
+    const char *recipient = ae->recipient;
+    if(!recipient) recipient = health.health_default_recipient;
+
+    snprintfz(buffer, FILENAME_MAX, "exec %s '%s' '%s' '%u' '%u' '%u' '%lu' '%s' '%s' '%s' '%s' '%s' '%0.0Lf' '%0.0Lf' '%s' '%u' '%u' '%s' '%s'",
               exec,
+              recipient,
+              host->hostname,
+              ae->unique_id,
+              ae->alarm_id,
+              ae->alarm_event_id,
+              (unsigned long)ae->when,
               ae->name,
               ae->chart?ae->chart:"NOCAHRT",
               ae->family?ae->family:"NOFAMILY",
@@ -1767,25 +2174,29 @@ static inline void health_alarm_execute(ALARM_ENTRY *ae) {
     );
 
     ae->notifications |= HEALTH_ENTRY_NOTIFICATIONS_EXEC_RUN;
+    ae->exec_run_timestamp = time(NULL);
 
     debug(D_HEALTH, "executing command '%s'", buffer);
     FILE *fp = mypopen(buffer, &command_pid);
     if(!fp) {
         error("HEALTH: Cannot popen(\"%s\", \"r\").", buffer);
-        return;
+        goto done;
     }
     debug(D_HEALTH, "HEALTH reading from command");
     char *s = fgets(buffer, FILENAME_MAX, fp);
     (void)s;
-    debug(D_HEALTH, "HEALTH closing command");
     ae->exec_code = mypclose(fp, command_pid);
     debug(D_HEALTH, "done executing command - returned with code %d", ae->exec_code);
 
     if(ae->exec_code != 0)
         ae->notifications |= HEALTH_ENTRY_NOTIFICATIONS_EXEC_FAILED;
+
+done:
+    health_alarm_log_save(host, ae);
+    return;
 }
 
-static inline void health_process_notifications(ALARM_ENTRY *ae) {
+static inline void health_process_notifications(RRDHOST *host, ALARM_ENTRY *ae) {
     info("Health alarm '%s.%s' = %0.2Lf - changed status from %s to %s",
          ae->chart?ae->chart:"NOCHART", ae->name,
          ae->new_value,
@@ -1793,98 +2204,33 @@ static inline void health_process_notifications(ALARM_ENTRY *ae) {
          rrdcalc_status2string(ae->new_status)
     );
 
-    health_alarm_execute(ae);
+    health_alarm_execute(host, ae);
 }
 
-static inline void health_alarm_log(RRDHOST *host, time_t when,
-                const char *name, const char *chart, const char *family,
-                const char *exec, time_t duration,
-                calculated_number old_value, calculated_number new_value,
-                int old_status, int new_status,
-                const char *source,
-                const char *units,
-                const char *info
-) {
-    ALARM_ENTRY *ae = callocz(1, sizeof(ALARM_ENTRY));
-    ae->name = strdupz(name);
-    ae->hash_name = simple_hash(ae->name);
-
-    if(chart) {
-        ae->chart = strdupz(chart);
-        ae->hash_chart = simple_hash(ae->chart);
-    }
-
-    if(family)
-        ae->family = strdupz(family);
-
-    if(exec) ae->exec = strdupz(exec);
-    if(source) ae->source = strdupz(source);
-    if(units) ae->units = strdupz(units);
-    if(info) ae->info = strdupz(info);
-
-    ae->id = host->health_log.nextid++;
-    ae->when = when;
-    ae->old_value = old_value;
-    ae->new_value = new_value;
-    ae->old_status = old_status;
-    ae->new_status = new_status;
-    ae->duration = duration;
-
-    if(ae->old_status == RRDCALC_STATUS_WARNING || ae->old_status == RRDCALC_STATUS_CRITICAL)
-        ae->non_clear_duration += ae->duration;
-
-    // link it
-    pthread_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
-    ae->next = host->health_log.alarms;
-    host->health_log.alarms = ae;
-    host->health_log.count++;
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
+static inline void health_alarm_log_process(RRDHOST *host) {
+    static uint32_t stop_at_id = 0;
+    uint32_t first_waiting = (host->health_log.alarms)?host->health_log.alarms->unique_id:0;
+    time_t now = time(NULL);
 
-    // match previous alarms
     pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
-    ALARM_ENTRY *t;
-    for(t = host->health_log.alarms ; t ; t = t->next) {
-        if(t != ae &&
-                t->hash_name == ae->hash_name &&
-                t->hash_chart == ae->hash_chart &&
-                !strcmp(t->name, ae->name) &&
-                t->chart && ae->chart && !strcmp(t->chart, ae->chart)) {
-
-            if(!(t->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED) && !t->updated_by) {
-                t->notifications |= HEALTH_ENTRY_NOTIFICATIONS_UPDATED;
-                t->updated_by = ae;
 
-                if((t->new_status == RRDCALC_STATUS_WARNING || t->new_status == RRDCALC_STATUS_CRITICAL) &&
-                   (t->old_status == RRDCALC_STATUS_WARNING || t->old_status == RRDCALC_STATUS_CRITICAL))
-                    ae->non_clear_duration += t->non_clear_duration;
-            }
-            else {
-                // no need to continue
-                break;
-            }
-        }
-    }
-    pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
-}
-
-static inline void health_alarm_log_process(RRDHOST *host) {
-    static uint32_t last_processed = 0;
     ALARM_ENTRY *ae;
+    for(ae = host->health_log.alarms; ae && ae->unique_id >= stop_at_id ; ae = ae->next) {
+        if(unlikely(
+            !(ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_PROCESSED) &&
+            !(ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED)
+            )) {
 
-    pthread_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
-
-    for(ae = host->health_log.alarms; ae ;ae = ae->next) {
-        if(last_processed >= ae->id) break;
+            if(unlikely(ae->unique_id < first_waiting))
+                first_waiting = ae->unique_id;
 
-        if(!(ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_PROCESSED) &&
-                !(ae->notifications & HEALTH_ENTRY_NOTIFICATIONS_UPDATED)) {
-            ae->notifications |= HEALTH_ENTRY_NOTIFICATIONS_PROCESSED;
-            health_process_notifications(ae);
+            if(likely(now >= ae->delay_up_to_timestamp))
+                health_process_notifications(host, ae);
         }
     }
 
-    if(host->health_log.alarms)
-        last_processed = host->health_log.alarms->id;
+    // remember this for the next iteration
+    stop_at_id = first_waiting;
 
     pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
 
@@ -1895,7 +2241,7 @@ static inline void health_alarm_log_process(RRDHOST *host) {
     pthread_rwlock_wrlock(&host->health_log.alarm_log_rwlock);
 
     ALARM_ENTRY *last = NULL;
-    unsigned int count = host->health_log.max;
+    unsigned int count = host->health_log.max * 2 / 3;
     for(ae = host->health_log.alarms; ae && count ; count--, last = ae, ae = ae->next) ;
 
     if(ae && last && last->next == ae)
@@ -1904,23 +2250,60 @@ static inline void health_alarm_log_process(RRDHOST *host) {
         ae = NULL;
 
     while(ae) {
+        debug(D_HEALTH, "Health removing alarm log entry with id: %u", ae->unique_id);
+
         ALARM_ENTRY *t = ae->next;
 
         freez(ae->name);
         freez(ae->chart);
         freez(ae->family);
         freez(ae->exec);
+        freez(ae->recipient);
         freez(ae->source);
         freez(ae->units);
         freez(ae->info);
         freez(ae);
 
         ae = t;
+        host->health_log.count--;
     }
 
     pthread_rwlock_unlock(&host->health_log.alarm_log_rwlock);
 }
 
+static inline int rrdcalc_isrunnable(RRDCALC *rc, time_t now, time_t *next_run) {
+    if (unlikely(!rc->rrdset)) {
+        debug(D_HEALTH, "Health not running alarm '%s.%s'. It is not linked to a chart.", rc->chart?rc->chart:"NOCHART", rc->name);
+        return 0;
+    }
+
+    if (unlikely(!rc->rrdset->last_collected_time.tv_sec)) {
+        debug(D_HEALTH, "Health not running alarm '%s.%s'. Chart is not yet collected.", rc->chart?rc->chart:"NOCHART", rc->name);
+        return 0;
+    }
+
+    if (unlikely(!rc->update_every)) {
+        debug(D_HEALTH, "Health not running alarm '%s.%s'. It does not have an update frequency", rc->chart?rc->chart:"NOCHART", rc->name);
+        return 0;
+    }
+
+    if (unlikely(rc->next_update > now)) {
+        if (unlikely(*next_run > rc->next_update))
+            *next_run = rc->next_update;
+
+        debug(D_HEALTH, "Health not examining alarm '%s.%s' yet (will do in %d secs).", rc->chart?rc->chart:"NOCHART", rc->name, (int) (rc->next_update - now));
+        return 0;
+    }
+
+    // FIXME
+    // we should check that the DB lookup is possible
+    // i.e.
+    // - the duration of the chart includes the required timeframe
+    // we SHOULD NOT check the dimensions - there might be alarms that refer non-existing dimensions (e.g. cpu steal)
+
+    return 1;
+}
+
 void *health_main(void *ptr) {
     (void)ptr;
 
@@ -1938,7 +2321,7 @@ void *health_main(void *ptr) {
     BUFFER *wb = buffer_create(100);
 
     unsigned int loop = 0;
-    while(health_enabled) {
+    while(health_enabled && !netdata_exit) {
         loop++;
         debug(D_HEALTH, "Health monitoring iteration no %u started", loop);
 
@@ -2053,7 +2436,7 @@ void *health_main(void *ptr) {
         }
         rrdhost_unlock(&localhost);
 
-        if (runnable) {
+        if (unlikely(runnable && !netdata_exit)) {
             rrdhost_rdlock(&localhost);
 
             for (rc = localhost.alarms; rc; rc = rc->next) {
@@ -2063,7 +2446,7 @@ void *health_main(void *ptr) {
                 int warning_status  = RRDCALC_STATUS_UNDEFINED;
                 int critical_status = RRDCALC_STATUS_UNDEFINED;
 
-                if(unlikely(rc->warning)) {
+                if(likely(rc->warning)) {
                     if(unlikely(!expression_evaluate(rc->warning))) {
                         // calculation failed
 
@@ -2093,7 +2476,7 @@ void *health_main(void *ptr) {
                     }
                 }
 
-                if(unlikely(rc->critical)) {
+                if(likely(rc->critical)) {
                     if(unlikely(!expression_evaluate(rc->critical))) {
                         // calculation failed
 
@@ -2153,7 +2536,34 @@ void *health_main(void *ptr) {
                 }
 
                 if(status != rc->status) {
-                    health_alarm_log(&localhost, time(NULL), rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, now - rc->last_status_change, rc->old_value, rc->value, rc->status, status, rc->source, rc->units, rc->info);
+                    int delay = 0;
+
+                    if(now > rc->delay_up_to_timestamp) {
+                        rc->delay_up_current = rc->delay_up_duration;
+                        rc->delay_down_current = rc->delay_down_duration;
+                        rc->delay_last = 0;
+                        rc->delay_up_to_timestamp = 0;
+                    }
+                    else {
+                        rc->delay_up_current = (int)(rc->delay_up_current * rc->delay_multiplier);
+                        if(rc->delay_up_current > rc->delay_max_duration) rc->delay_up_current = rc->delay_max_duration;
+
+                        rc->delay_down_current = (int)(rc->delay_down_current * rc->delay_multiplier);
+                        if(rc->delay_down_current > rc->delay_max_duration) rc->delay_down_current = rc->delay_max_duration;
+                    }
+
+                    if(status > rc->status)
+                        delay = rc->delay_up_current;
+                    else
+                        delay = rc->delay_down_current;
+
+                    // COMMENTED: because we do need to send raising alarms
+                    // if(now + delay < rc->delay_up_to_timestamp)
+                    //    delay = (int)(rc->delay_up_to_timestamp - now);
+
+                    rc->delay_last = delay;
+                    rc->delay_up_to_timestamp = now + delay;
+                    health_alarm_log(&localhost, rc->id, rc->next_event_id++, now, rc->name, rc->rrdset->id, rc->rrdset->family, rc->exec, rc->recipient, now - rc->last_status_change, rc->old_value, rc->value, rc->status, status, rc->source, rc->units, rc->info, rc->delay_last);
                     rc->last_status_change = now;
                     rc->status = status;
                 }
@@ -2171,10 +2581,16 @@ void *health_main(void *ptr) {
         if (unlikely(pthread_setcancelstate(oldstate, NULL) != 0))
             error("Cannot set pthread cancel state to RESTORE (%d).", oldstate);
 
+        if(unlikely(netdata_exit))
+            break;
+
         // execute notifications
         // and cleanup
         health_alarm_log_process(&localhost);
 
+        if(unlikely(netdata_exit))
+            break;
+        
         now = time(NULL);
         if(now < next_run) {
             debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration in %d secs",
diff --git a/src/health.h b/src/health.h
index ef1158a29..9d5834fca 100644
--- a/src/health.h
+++ b/src/health.h
@@ -105,8 +105,9 @@ typedef struct rrddimvar {
 // having as RRDSET.calculations the RRDCALC to be processed
 // next.
 
-#define RRDCALC_STATUS_UNINITIALIZED  0
+#define RRDCALC_STATUS_REMOVED       -2
 #define RRDCALC_STATUS_UNDEFINED     -1
+#define RRDCALC_STATUS_UNINITIALIZED  0
 #define RRDCALC_STATUS_CLEAR          1
 #define RRDCALC_STATUS_RAISED         2
 #define RRDCALC_STATUS_WARNING        3
@@ -120,52 +121,89 @@ typedef struct rrddimvar {
 #define RRDCALC_FLAG_CRIT_ERROR    0x00000020
 
 typedef struct rrdcalc {
-    char *name;
-    uint32_t hash;
+    uint32_t id;                    // the unique id of this alarm
+    uint32_t next_event_id;         // the next event id that will be used for this alarm
 
-    char *exec;
+    char *name;                     // the name of this alarm
+    uint32_t hash;      
 
-    char *chart;        // the chart id this should be linked to
+    char *exec;                     // the command to execute when this alarm switches state
+    char *recipient;                // the recipient of the alarm (the first parameter to exec)
+
+    char *chart;                    // the chart id this should be linked to
     uint32_t hash_chart;
 
-    char *source;       // the source of this calculation
-    char *units;
-    char *info;
+    char *source;                   // the source of this alarm
+    char *units;                    // the units of the alarm
+    char *info;                     // a short description of the alarm
+
+    int update_every;               // update frequency for the alarm
+
+    // the red and green threshold of this alarm (to be set to the chart)
+    calculated_number green;
+    calculated_number red;
 
-    char *dimensions;   // the chart dimensions
+    // ------------------------------------------------------------------------
+    // database lookup settings
 
-    int group;          // grouping method: average, max, etc.
-    int before;         // ending point in time-series
-    int after;          // starting point in time-series
-    uint32_t options;   // calculation options
-    int update_every;   // update frequency for the calculation
+    char *dimensions;               // the chart dimensions
+    int group;                      // grouping method: average, max, etc.
+    int before;                     // ending point in time-series
+    int after;                      // starting point in time-series
+    uint32_t options;               // calculation options
 
-    time_t last_updated;
-    time_t next_update;
+    // ------------------------------------------------------------------------
+    // expressions related to the alarm
 
-    EVAL_EXPRESSION *calculation;
-    EVAL_EXPRESSION *warning;
-    EVAL_EXPRESSION *critical;
+    EVAL_EXPRESSION *calculation;   // expression to calculate the value of the alarm
+    EVAL_EXPRESSION *warning;       // expression to check the warning condition
+    EVAL_EXPRESSION *critical;      // expression to check the critical condition
 
-    uint32_t rrdcalc_flags;
-    int status;
+    // ------------------------------------------------------------------------
+    // notification delay settings
 
-    time_t db_after;
-    time_t db_before;
-    time_t last_status_change;
+    int delay_up_duration;         // duration to delay notifications when alarm raises
+    int delay_down_duration;       // duration to delay notifications when alarm lowers
+    int delay_max_duration;        // the absolute max delay to apply to this alarm
+    float delay_multiplier;        // multiplier for all delays when alarms switch status
+                                   // while now < delay_up_to
 
-    calculated_number value;
-    calculated_number old_value;
+    // ------------------------------------------------------------------------
+    // runtime information
 
-    calculated_number green;
-    calculated_number red;
+    int status;                     // the current status of the alarm
+
+    calculated_number value;        // the current value of the alarm
+    calculated_number old_value;    // the previous value of the alarm
+
+    uint32_t rrdcalc_flags;         // check RRDCALC_FLAG_*
+
+    time_t last_updated;            // the last update timestamp of the alarm
+    time_t next_update;             // the next update timestamp of the alarm
+    time_t last_status_change;      // the timestamp of the last time this alarm changed status
+
+    time_t db_after;                // the first timestamp evaluated by the db lookup
+    time_t db_before;               // the last timestamp evaluated by the db lookup
+
+    time_t delay_up_to_timestamp;   // the timestamp up to which we should delay notifications
+    int delay_up_current;           // the current up notification delay duration
+    int delay_down_current;         // the current down notification delay duration
+    int delay_last;                 // the last delay we used
+
+    // ------------------------------------------------------------------------
+    // variables this alarm exposes to the rest of the alarms
 
     RRDVAR *local;
     RRDVAR *family;
     RRDVAR *hostid;
     RRDVAR *hostname;
 
+    // ------------------------------------------------------------------------
+    // the chart this alarm it is linked to
+
     struct rrdset *rrdset;
+
+    // linking of this alarm on its chart
     struct rrdcalc *rrdset_next;
     struct rrdcalc *rrdset_prev;
 
@@ -182,29 +220,45 @@ typedef struct rrdcalctemplate {
     uint32_t hash_name;
 
     char *exec;
+    char *recipient;
 
     char *context;
     uint32_t hash_context;
 
-    char *source;       // the source of this template
-    char *units;
-    char *info;
+    char *source;                   // the source of this alarm
+    char *units;                    // the units of the alarm
+    char *info;                     // a short description of the alarm
+
+    int update_every;               // update frequency for the alarm
 
-    char *dimensions;
+    // the red and green threshold of this alarm (to be set to the chart)
+    calculated_number green;
+    calculated_number red;
+
+    // ------------------------------------------------------------------------
+    // database lookup settings
+
+    char *dimensions;               // the chart dimensions
+    int group;                      // grouping method: average, max, etc.
+    int before;                     // ending point in time-series
+    int after;                      // starting point in time-series
+    uint32_t options;               // calculation options
+
+    // ------------------------------------------------------------------------
+    // notification delay settings
 
-    int group;          // grouping method: average, max, etc.
-    int before;         // ending point in time-series
-    int after;          // starting point in time-series
-    uint32_t options;   // calculation options
-    int update_every;   // update frequency for the calculation
+    int delay_up_duration;         // duration to delay notifications when alarm raises
+    int delay_down_duration;       // duration to delay notifications when alarm lowers
+    int delay_max_duration;        // the absolute max delay to apply to this alarm
+    float delay_multiplier;        // multiplier for all delays when alarms switch status
+
+    // ------------------------------------------------------------------------
+    // expressions related to the alarm
 
     EVAL_EXPRESSION *calculation;
     EVAL_EXPRESSION *warning;
     EVAL_EXPRESSION *critical;
 
-    calculated_number green;
-    calculated_number red;
-
     struct rrdcalctemplate *next;
 } RRDCALCTEMPLATE;
 
@@ -216,7 +270,9 @@ typedef struct rrdcalctemplate {
 #define HEALTH_ENTRY_NOTIFICATIONS_EXEC_FAILED  0x00000008
 
 typedef struct alarm_entry {
-    uint32_t id;
+    uint32_t unique_id;
+    uint32_t alarm_id;
+    uint32_t alarm_event_id;
 
     time_t when;
     time_t duration;
@@ -231,6 +287,8 @@ typedef struct alarm_entry {
     char *family;
 
     char *exec;
+    char *recipient;
+    time_t exec_run_timestamp;
     int exec_code;
 
     char *source;
@@ -244,12 +302,18 @@ typedef struct alarm_entry {
 
     uint32_t notifications;
 
-    struct alarm_entry *updated_by;
+    int delay;
+    time_t delay_up_to_timestamp;
+
+    uint32_t updated_by_id;
+    uint32_t updates_id;
+    
     struct alarm_entry *next;
 } ALARM_ENTRY;
 
 typedef struct alarm_log {
-    uint32_t nextid;
+    uint32_t next_log_id;
+    uint32_t next_alarm_id;
     unsigned int count;
     unsigned int max;
     ALARM_ENTRY *alarms;
@@ -278,6 +342,6 @@ extern void health_reload(void);
 
 extern int health_variable_lookup(const char *variable, uint32_t hash, RRDCALC *rc, calculated_number *result);
 extern void health_alarms2json(RRDHOST *host, BUFFER *wb, int all);
-extern void health_alarm_log2json(RRDHOST *host, BUFFER *wb);
+extern void health_alarm_log2json(RRDHOST *host, BUFFER *wb, uint32_t after);
 
 #endif //NETDATA_HEALTH_H
diff --git a/src/log.c b/src/log.c
index e952c5724..b7ec64bcb 100644
--- a/src/log.c
+++ b/src/log.c
@@ -90,27 +90,28 @@ int open_log_file(int fd, FILE **fp, const char *filename, int *enabled_syslog)
 
 void reopen_all_log_files() {
     if(stdout_filename)
-        open_log_file(STDOUT_FILENO, &stdout, stdout_filename, &output_log_syslog);
+        open_log_file(STDOUT_FILENO, (FILE **)&stdout, stdout_filename, &output_log_syslog);
 
     if(stderr_filename)
-        open_log_file(STDERR_FILENO, &stderr, stderr_filename, &error_log_syslog);
+        open_log_file(STDERR_FILENO, (FILE **)&stderr, stderr_filename, &error_log_syslog);
 
     if(stdaccess_filename)
-        stdaccess_fd = open_log_file(stdaccess_fd, &stdaccess, stdaccess_filename, &access_log_syslog);
+        stdaccess_fd = open_log_file(stdaccess_fd, (FILE **)&stdaccess, stdaccess_filename, &access_log_syslog);
 }
 
 void open_all_log_files() {
     // disable stdin
-    open_log_file(STDIN_FILENO, &stdin, "/dev/null", NULL);
+    open_log_file(STDIN_FILENO, (FILE **)&stdin, "/dev/null", NULL);
 
-    open_log_file(STDOUT_FILENO, &stdout, stdout_filename, &output_log_syslog);
-    open_log_file(STDERR_FILENO, &stderr, stderr_filename, &error_log_syslog);
-    stdaccess_fd = open_log_file(stdaccess_fd, &stdaccess, stdaccess_filename, &access_log_syslog);
+    open_log_file(STDOUT_FILENO, (FILE **)&stdout, stdout_filename, &output_log_syslog);
+    open_log_file(STDERR_FILENO, (FILE **)&stderr, stderr_filename, &error_log_syslog);
+    stdaccess_fd = open_log_file(stdaccess_fd, (FILE **)&stdaccess, stdaccess_filename, &access_log_syslog);
 }
 
 // ----------------------------------------------------------------------------
 // error log throttling
 
+time_t error_log_throttle_period_backup = 0;
 time_t error_log_throttle_period = 1200;
 unsigned long error_log_errors_per_period = 200;
 
@@ -265,6 +266,28 @@ void info_int( const char *file, const char *function, const unsigned long line,
 // ----------------------------------------------------------------------------
 // error log
 
+#if defined(STRERROR_R_CHAR_P)
+// GLIBC version of strerror_r
+static const char *strerror_result(const char *a, const char *b) { (void)b; return a; }
+#elif defined(HAVE_STRERROR_R)
+// POSIX version of strerror_r
+static const char *strerror_result(int a, const char *b) { (void)a; return b; }
+#elif defined(HAVE_C__GENERIC)
+
+// what a trick!
+// http://stackoverflow.com/questions/479207/function-overloading-in-c
+static const char *strerror_result_int(int a, const char *b) { (void)a; return b; }
+static const char *strerror_result_string(const char *a, const char *b) { (void)b; return a; }
+
+#define strerror_result(a, b) _Generic((a), \
+    int: strerror_result_int, \
+    char *: strerror_result_string \
+    )(a, b)
+
+#else
+#error "cannot detect the format of function strerror_r()"
+#endif
+
 void error_int( const char *prefix, const char *file, const char *function, const unsigned long line, const char *fmt, ... )
 {
     va_list args;
@@ -282,7 +305,7 @@ void error_int( const char *prefix, const char *file, const char *function, cons
 
     if(errno) {
         char buf[1024];
-        fprintf(stderr, " (errno %d, %s)\n", errno, strerror_r(errno, buf, 1023));
+        fprintf(stderr, " (errno %d, %s)\n", errno, strerror_result(strerror_r(errno, buf, 1023), buf));
         errno = 0;
     }
     else
diff --git a/src/log.h b/src/log.h
index 93d95321e..3a022fc93 100644
--- a/src/log.h
+++ b/src/log.h
@@ -45,14 +45,14 @@ extern int access_log_syslog;
 extern int error_log_syslog;
 extern int output_log_syslog;
 
-extern time_t error_log_throttle_period;
+extern time_t error_log_throttle_period, error_log_throttle_period_backup;
 extern unsigned long error_log_errors_per_period;
 extern int error_log_limit(int reset);
 
 extern void open_all_log_files();
 extern void reopen_all_log_files();
 
-#define error_log_limit_reset() do { error_log_limit(1); } while(0)
+#define error_log_limit_reset() do { error_log_throttle_period = error_log_throttle_period_backup; error_log_limit(1); } while(0)
 #define error_log_limit_unlimited() do { error_log_throttle_period = 0; } while(0)
 
 #define debug(type, args...) do { if(unlikely(debug_flags & type)) debug_int(__FILE__, __FUNCTION__, __LINE__, ##args); } while(0)
diff --git a/src/main.c b/src/main.c
index 4d55a1425..3e6aa5046 100644
--- a/src/main.c
+++ b/src/main.c
@@ -276,20 +276,16 @@ static const char *verify_required_directory(const char *dir) {
 
 int main(int argc, char **argv)
 {
+    char *hostname = "localhost";
     int i, check_config = 0;
     int config_loaded = 0;
     int dont_fork = 0;
     size_t wanted_stacksize = 0, stacksize = 0;
     pthread_attr_t attr;
 
-    // global initialization
-    get_HZ();
-
     // set the name for logging
     program_name = "netdata";
 
-    // parse command line.
-
     // parse depercated options
     // TODO: Remove this block with the next major release.
     {
@@ -378,7 +374,7 @@ int main(int argc, char **argv)
                     break;
                 case 'v':
                     // TODO: Outsource version to makefile which can compute version from git.
-                    printf("netdata 1.3.0\n");
+                    printf("netdata %s\n", VERSION);
                     return 0;
                 case 'W':
                     {
@@ -411,6 +407,16 @@ int main(int argc, char **argv)
         load_config(NULL, 0);
 
     {
+        char *pmax = config_get("global", "glibc malloc arena max for plugins", "1");
+        if(pmax && *pmax)
+            setenv("MALLOC_ARENA_MAX", pmax, 1);
+
+#if defined(HAVE_C_MALLOPT)
+        int i = config_get_number("global", "glibc malloc arena max for netdata", 1);
+        if(i > 0)
+            mallopt(M_ARENA_MAX, 1);
+#endif
+
         char *config_dir = config_get("global", "config directory", CONFIG_DIR);
 
         // prepare configuration environment variables for the plugins
@@ -471,13 +477,18 @@ int main(int argc, char **argv)
         global_host_prefix = config_get("global", "host access prefix", "");
         setenv("NETDATA_HOST_PREFIX", global_host_prefix, 1);
 
+        get_system_HZ();
+        get_system_cpus();
+        get_system_pid_max();
+        
         // --------------------------------------------------------------------
 
         stdout_filename    = config_get("global", "debug log",  LOG_DIR "/debug.log");
         stderr_filename    = config_get("global", "error log",  LOG_DIR "/error.log");
         stdaccess_filename = config_get("global", "access log", LOG_DIR "/access.log");
 
-        error_log_throttle_period = config_get_number("global", "errors flood protection period", error_log_throttle_period);
+        error_log_throttle_period_backup =
+            error_log_throttle_period = config_get_number("global", "errors flood protection period", error_log_throttle_period);
         setenv("NETDATA_ERRORS_THROTTLE_PERIOD", config_get("global", "errors flood protection period"    , ""), 1);
 
         error_log_errors_per_period = (unsigned long)config_get_number("global", "errors to trigger flood protection", error_log_errors_per_period);
@@ -488,6 +499,7 @@ int main(int argc, char **argv)
             error_log_throttle_period = 0;
             error_log_errors_per_period = 0;
         }
+        error_log_limit_unlimited();
 
         // --------------------------------------------------------------------
 
@@ -647,6 +659,11 @@ int main(int argc, char **argv)
     }
 
     // ------------------------------------------------------------------------
+    // initialize rrd host
+
+    rrdhost_init(hostname);
+
+    // ------------------------------------------------------------------------
     // initialize the registry
 
     registry_init();
@@ -660,6 +677,11 @@ int main(int argc, char **argv)
         exit(1);
 
     // ------------------------------------------------------------------------
+    // enable log flood protection
+
+    error_log_limit_reset();
+
+    // ------------------------------------------------------------------------
     // spawn the threads
 
     web_server_threading_selection();
diff --git a/src/plugin_nfacct.c b/src/plugin_nfacct.c
index b2396fac1..7843161d3 100644
--- a/src/plugin_nfacct.c
+++ b/src/plugin_nfacct.c
@@ -27,11 +27,7 @@ static int nfacct_callback(const struct nlmsghdr *nlh, void *data) {
 
         info("nfacct.plugin: increasing nfacct_list to size %d", size);
 
-        nfacct_list = realloc(nfacct_list, sizeof(struct nfacct_list) + (sizeof(struct mynfacct) * size));
-        if(!nfacct_list) {
-            error("nfacct.plugin: cannot allocate nfacct_list.");
-            return MNL_CB_OK;
-        }
+        nfacct_list = reallocz(nfacct_list, sizeof(struct nfacct_list) + (sizeof(struct mynfacct) * size));
 
         nfacct_list->data[len].nfacct = nfacct_alloc();
         if(!nfacct_list->data[size - 1].nfacct) {
@@ -150,7 +146,7 @@ void *nfacct_main(void *ptr) {
 
             st = rrdset_find_bytype("netfilter", "nfacct_packets");
             if(!st) {
-                st = rrdset_create("netfilter", "nfacct_packets", NULL, "nfacct", NULL, "Netfilter Accounting Packets", "packets/s", 1006, rrd_update_every, RRDSET_TYPE_STACKED);
+                st = rrdset_create("netfilter", "nfacct_packets", NULL, "nfacct", NULL, "Netfilter Accounting Packets", "packets/s", 3206, rrd_update_every, RRDSET_TYPE_STACKED);
 
                 for(i = 0; i < nfacct_list->len ; i++)
                     rrddim_add(st, nfacct_list->data[i].name, NULL, 1, rrd_update_every, RRDDIM_INCREMENTAL);
@@ -170,7 +166,7 @@ void *nfacct_main(void *ptr) {
 
             st = rrdset_find_bytype("netfilter", "nfacct_bytes");
             if(!st) {
-                st = rrdset_create("netfilter", "nfacct_bytes", NULL, "nfacct", NULL, "Netfilter Accounting Bandwidth", "kilobytes/s", 1007, rrd_update_every, RRDSET_TYPE_STACKED);
+                st = rrdset_create("netfilter", "nfacct_bytes", NULL, "nfacct", NULL, "Netfilter Accounting Bandwidth", "kilobytes/s", 3207, rrd_update_every, RRDSET_TYPE_STACKED);
 
                 for(i = 0; i < nfacct_list->len ; i++)
                     rrddim_add(st, nfacct_list->data[i].name, NULL, 1, 1000 * rrd_update_every, RRDDIM_INCREMENTAL);
@@ -192,7 +188,7 @@ void *nfacct_main(void *ptr) {
         usleep(susec);
 
         // copy current to last
-        bcopy(&now, &last, sizeof(struct timeval));
+        memmove(&last, &now, sizeof(struct timeval));
     }
 
     mnl_socket_close(nl);
diff --git a/src/plugin_proc.c b/src/plugin_proc.c
index a1bf314de..a50a22514 100644
--- a/src/plugin_proc.c
+++ b/src/plugin_proc.c
@@ -28,10 +28,12 @@ void *proc_main(void *ptr)
     int vdo_proc_stat               = !config_get_boolean("plugin:proc", "/proc/stat", 1);
     int vdo_proc_meminfo            = !config_get_boolean("plugin:proc", "/proc/meminfo", 1);
     int vdo_proc_vmstat             = !config_get_boolean("plugin:proc", "/proc/vmstat", 1);
+    int vdo_proc_net_rpc_nfs        = !config_get_boolean("plugin:proc", "/proc/net/rpc/nfs", 1);
     int vdo_proc_net_rpc_nfsd       = !config_get_boolean("plugin:proc", "/proc/net/rpc/nfsd", 1);
     int vdo_proc_sys_kernel_random_entropy_avail    = !config_get_boolean("plugin:proc", "/proc/sys/kernel/random/entropy_avail", 1);
     int vdo_proc_interrupts         = !config_get_boolean("plugin:proc", "/proc/interrupts", 1);
     int vdo_proc_softirqs           = !config_get_boolean("plugin:proc", "/proc/softirqs", 1);
+    int vdo_proc_net_softnet_stat   = !config_get_boolean("plugin:proc", "/proc/net/softnet_stat", 1);
     int vdo_proc_loadavg            = !config_get_boolean("plugin:proc", "/proc/loadavg", 1);
     int vdo_sys_kernel_mm_ksm       = !config_get_boolean("plugin:proc", "/sys/kernel/mm/ksm", 1);
     int vdo_cpu_netdata             = !config_get_boolean("plugin:proc", "netdata server resources", 1);
@@ -48,10 +50,12 @@ void *proc_main(void *ptr)
     unsigned long long sutime_proc_stat = 0ULL;
     unsigned long long sutime_proc_meminfo = 0ULL;
     unsigned long long sutime_proc_vmstat = 0ULL;
+    unsigned long long sutime_proc_net_rpc_nfs = 0ULL;
     unsigned long long sutime_proc_net_rpc_nfsd = 0ULL;
     unsigned long long sutime_proc_sys_kernel_random_entropy_avail = 0ULL;
     unsigned long long sutime_proc_interrupts = 0ULL;
     unsigned long long sutime_proc_softirqs = 0ULL;
+    unsigned long long sutime_proc_net_softnet_stat = 0ULL;
     unsigned long long sutime_proc_loadavg = 0ULL;
     unsigned long long sutime_sys_kernel_mm_ksm = 0ULL;
 
@@ -59,7 +63,7 @@ void *proc_main(void *ptr)
     unsigned long long sunext = (time(NULL) - (time(NULL) % rrd_update_every) + rrd_update_every) * 1000000ULL;
     unsigned long long sunow;
 
-    for(;1;) {
+    for(;;) {
         if(unlikely(netdata_exit)) break;
 
         // delay until it is our time to run
@@ -107,6 +111,14 @@ void *proc_main(void *ptr)
         }
         if(unlikely(netdata_exit)) break;
 
+        if(!vdo_proc_net_softnet_stat) {
+            debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_proc_net_softnet_stat().");
+            sunow = time_usec();
+            vdo_proc_net_softnet_stat = do_proc_net_softnet_stat(rrd_update_every, (sutime_proc_net_softnet_stat > 0)?sunow - sutime_proc_net_softnet_stat:0ULL);
+            sutime_proc_net_softnet_stat = sunow;
+        }
+        if(unlikely(netdata_exit)) break;
+
         if(!vdo_proc_sys_kernel_random_entropy_avail) {
             debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_proc_sys_kernel_random_entropy_avail().");
             sunow = time_usec();
@@ -211,6 +223,14 @@ void *proc_main(void *ptr)
         }
         if(unlikely(netdata_exit)) break;
 
+        if(!vdo_proc_net_rpc_nfs) {
+            debug(D_PROCNETDEV_LOOP, "PROCNETDEV: calling do_proc_net_rpc_nfs().");
+            sunow = time_usec();
+            vdo_proc_net_rpc_nfs = do_proc_net_rpc_nfs(rrd_update_every, (sutime_proc_net_rpc_nfs > 0)?sunow - sutime_proc_net_rpc_nfs:0ULL);
+            sutime_proc_net_rpc_nfs = sunow;
+        }
+        if(unlikely(netdata_exit)) break;
+
         // END -- the job is done
 
         // --------------------------------------------------------------------
@@ -221,6 +241,8 @@ void *proc_main(void *ptr)
         }
     }
 
+    info("PROC thread exiting");
+
     pthread_exit(NULL);
     return NULL;
 }
diff --git a/src/plugin_proc.h b/src/plugin_proc.h
index a512e1cdf..f72a9970f 100644
--- a/src/plugin_proc.h
+++ b/src/plugin_proc.h
@@ -13,6 +13,7 @@ extern int do_proc_net_ip_vs_stats(int update_every, unsigned long long dt);
 extern int do_proc_stat(int update_every, unsigned long long dt);
 extern int do_proc_meminfo(int update_every, unsigned long long dt);
 extern int do_proc_vmstat(int update_every, unsigned long long dt);
+extern int do_proc_net_rpc_nfs(int update_every, unsigned long long dt);
 extern int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt);
 extern int do_proc_sys_kernel_random_entropy_avail(int update_every, unsigned long long dt);
 extern int do_proc_interrupts(int update_every, unsigned long long dt);
@@ -20,5 +21,6 @@ extern int do_proc_softirqs(int update_every, unsigned long long dt);
 extern int do_sys_kernel_mm_ksm(int update_every, unsigned long long dt);
 extern int do_proc_loadavg(int update_every, unsigned long long dt);
 extern int do_proc_net_stat_synproxy(int update_every, unsigned long long dt);
+extern int do_proc_net_softnet_stat(int update_every, unsigned long long dt);
 
 #endif /* NETDATA_PLUGIN_PROC_H */
diff --git a/src/plugin_tc.c b/src/plugin_tc.c
index 408069dba..399fcd6db 100644
--- a/src/plugin_tc.c
+++ b/src/plugin_tc.c
@@ -39,6 +39,8 @@ struct tc_class {
     RRDDIM *rd_bytes;
     RRDDIM *rd_packets;
     RRDDIM *rd_dropped;
+    RRDDIM *rd_tokens;
+    RRDDIM *rd_ctokens;
 
     char name_updated;
     char updated;   // updated bytes
@@ -64,10 +66,14 @@ struct tc_device {
     char enabled_bytes;
     char enabled_packets;
     char enabled_dropped;
+    char enabled_tokens;
+    char enabled_ctokens;
 
     RRDSET *st_bytes;
     RRDSET *st_packets;
     RRDSET *st_dropped;
+    RRDSET *st_tokens;
+    RRDSET *st_ctokens;
 
     avl_tree classes_index;
 
@@ -177,18 +183,20 @@ static inline void tc_device_classes_cleanup(struct tc_device *d) {
 }
 
 static inline void tc_device_commit(struct tc_device *d) {
-    static int enable_new_interfaces = -1, enable_bytes = -1, enable_packets = -1, enable_dropped = -1;
+    static int enable_new_interfaces = -1, enable_bytes = -1, enable_packets = -1, enable_dropped = -1, enable_tokens = -1, enable_ctokens = -1;
 
     if(unlikely(enable_new_interfaces == -1)) {
         enable_new_interfaces = config_get_boolean_ondemand("plugin:tc", "enable new interfaces detected at runtime", CONFIG_ONDEMAND_YES);
         enable_bytes          = config_get_boolean_ondemand("plugin:tc", "enable traffic charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
         enable_packets        = config_get_boolean_ondemand("plugin:tc", "enable packets charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
         enable_dropped        = config_get_boolean_ondemand("plugin:tc", "enable dropped charts for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
+        enable_tokens         = config_get_boolean_ondemand("plugin:tc", "enable tokens charts for all interfaces", CONFIG_ONDEMAND_NO);
+        enable_ctokens        = config_get_boolean_ondemand("plugin:tc", "enable ctokens charts for all interfaces", CONFIG_ONDEMAND_NO);
     }
 
     // we only need to add leaf classes
     struct tc_class *c, *x;
-    unsigned long long bytes_sum = 0, packets_sum = 0, dropped_sum = 0;
+    unsigned long long bytes_sum = 0, packets_sum = 0, dropped_sum = 0, tokens_sum = 0, ctokens_sum = 0;
     int active_classes = 0;
 
     // set all classes
@@ -216,23 +224,26 @@ static inline void tc_device_commit(struct tc_device *d) {
         }
     }
 
-    // debugging:
+    // debugging only
     /*
-    for ( c = d->classes ; c ; c = c->next) {
-        if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device %s, class %s, OK", d->name, c->id);
-        else debug(D_TC_LOOP, "TC: Device %s, class %s, IGNORE (isleaf: %d, hasparent: %d, parent: %s)", d->name, c->id, c->isleaf, c->hasparent, c->parentid);
+    if(unlikely(debug_flags & D_TC_LOOP)) {
+        for(c = d->classes ; c ; c = c->next) {
+            if(c->isleaf && c->hasparent) debug(D_TC_LOOP, "TC: Device '%s', class %s, OK", d->name, c->id);
+            else debug(D_TC_LOOP, "TC: Device '%s', class %s, IGNORE (isleaf: %d, hasparent: %d, parent: %s)", d->name?d->name:d->id, c->id, c->isleaf, c->hasparent, c->parentid?c->parentid:"(unset)");
+        }
     }
     */
 
     // we need at least a class
     for(c = d->classes ; c ; c = c->next) {
         // debug(D_TC_LOOP, "TC: Device '%s', class '%s', isLeaf=%d, HasParent=%d, Seen=%d", d->name?d->name:d->id, c->name?c->name:c->id, c->isleaf, c->hasparent, c->seen);
-        if(!c->updated) continue;
-        if(c->isleaf && c->hasparent) {
+        if(unlikely(c->updated && c->isleaf && c->hasparent)) {
             active_classes++;
             bytes_sum += c->bytes;
             packets_sum += c->packets;
             dropped_sum += c->dropped;
+            tokens_sum += c->tokens;
+            ctokens_sum += c->ctokens;
         }
     }
 
@@ -242,7 +253,7 @@ static inline void tc_device_commit(struct tc_device *d) {
         return;
     }
 
-    if(unlikely(d->enabled == -1)) {
+    if(unlikely(d->enabled == (char)-1)) {
         char var_name[CONFIG_MAX_NAME + 1];
         snprintfz(var_name, CONFIG_MAX_NAME, "qos for %s", d->id);
         d->enabled         = config_get_boolean_ondemand("plugin:tc", var_name, enable_new_interfaces);
@@ -255,8 +266,30 @@ static inline void tc_device_commit(struct tc_device *d) {
 
         snprintfz(var_name, CONFIG_MAX_NAME, "dropped packets chart for %s", d->id);
         d->enabled_dropped = config_get_boolean_ondemand("plugin:tc", var_name, enable_dropped);
+
+        snprintfz(var_name, CONFIG_MAX_NAME, "tokens chart for %s", d->id);
+        d->enabled_tokens = config_get_boolean_ondemand("plugin:tc", var_name, enable_tokens);
+
+        snprintfz(var_name, CONFIG_MAX_NAME, "ctokens chart for %s", d->id);
+        d->enabled_ctokens = config_get_boolean_ondemand("plugin:tc", var_name, enable_ctokens);
     }
 
+    debug(D_TC_LOOP, "TC: evaluating TC device '%s'. enabled = %d/%d (bytes: %d/%d, packets: %d/%d, dropped: %d/%d, tokens: %d/%d, ctokens: %d/%d), classes = %d (bytes = %llu, packets = %llu, dropped = %llu, tokens = %llu, ctokens = %llu).",
+        d->name?d->name:d->id,
+        d->enabled, enable_new_interfaces,
+        d->enabled_bytes, enable_bytes,
+        d->enabled_packets, enable_packets,
+        d->enabled_dropped, enable_dropped,
+        d->enabled_tokens, enable_tokens,
+        d->enabled_ctokens, enable_ctokens,
+        active_classes,
+        bytes_sum,
+        packets_sum,
+        dropped_sum,
+        tokens_sum,
+        ctokens_sum
+        );
+
     if(likely(d->enabled)) {
         // --------------------------------------------------------------------
         // bytes
@@ -421,6 +454,114 @@ static inline void tc_device_commit(struct tc_device *d) {
             }
             rrdset_done(d->st_dropped);
         }
+
+        // --------------------------------------------------------------------
+        // tokens
+        
+        if(d->enabled_tokens == CONFIG_ONDEMAND_YES || (d->enabled_tokens == CONFIG_ONDEMAND_ONDEMAND && tokens_sum)) {
+            d->enabled_tokens = CONFIG_ONDEMAND_YES;
+            
+            if(unlikely(!d->st_tokens)) {
+                char id[RRD_ID_LENGTH_MAX + 1];
+                char name[RRD_ID_LENGTH_MAX + 1];
+                snprintfz(id, RRD_ID_LENGTH_MAX, "%s_tokens", d->id);
+                snprintfz(name, RRD_ID_LENGTH_MAX, "%s_tokens", d->name?d->name:d->id);
+
+                d->st_tokens = rrdset_find_bytype(RRD_TYPE_TC, id);
+                if(unlikely(!d->st_tokens)) {
+                    debug(D_TC_LOOP, "TC: Creating new _tokens chart for device '%s'", d->name?d->name:d->id);
+                    d->st_tokens = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_tokens", "Class Tokens", "tokens", 7030, rrd_update_every, RRDSET_TYPE_LINE);
+                }
+            }
+            else {
+                debug(D_TC_LOOP, "TC: Updating _tokens chart for device '%s'", d->name?d->name:d->id);
+                rrdset_next_plugins(d->st_tokens);
+
+                // FIXME
+                // update the family
+            }
+
+            for(c = d->classes ; c ; c = c->next) {
+                if(unlikely(!c->updated)) continue;
+
+                if(c->isleaf && c->hasparent) {
+                    if(unlikely(!c->rd_tokens)) {
+                        c->rd_tokens = rrddim_find(d->st_tokens, c->id);
+                        if(unlikely(!c->rd_tokens)) {
+                            debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_tokens->id, c->id, c->name);
+
+                            // new class, we have to add it
+                            c->rd_tokens = rrddim_add(d->st_tokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
+                        }
+                        else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_tokens->id, c->id);
+                    }
+
+                    rrddim_set_by_pointer(d->st_tokens, c->rd_tokens, c->tokens);
+
+                    // if it has a name, different to the id
+                    if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
+                        // update the rrd dimension with the new name
+                        debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_tokens->id, c->rd_tokens->id, c->name);
+                        rrddim_set_name(d->st_tokens, c->rd_tokens, c->name);
+                    }
+                }
+            }
+            rrdset_done(d->st_tokens);
+        }
+
+        // --------------------------------------------------------------------
+        // ctokens
+        
+        if(d->enabled_ctokens == CONFIG_ONDEMAND_YES || (d->enabled_ctokens == CONFIG_ONDEMAND_ONDEMAND && ctokens_sum)) {
+            d->enabled_ctokens = CONFIG_ONDEMAND_YES;
+            
+            if(unlikely(!d->st_ctokens)) {
+                char id[RRD_ID_LENGTH_MAX + 1];
+                char name[RRD_ID_LENGTH_MAX + 1];
+                snprintfz(id, RRD_ID_LENGTH_MAX, "%s_ctokens", d->id);
+                snprintfz(name, RRD_ID_LENGTH_MAX, "%s_ctokens", d->name?d->name:d->id);
+
+                d->st_ctokens = rrdset_find_bytype(RRD_TYPE_TC, id);
+                if(unlikely(!d->st_ctokens)) {
+                    debug(D_TC_LOOP, "TC: Creating new _ctokens chart for device '%s'", d->name?d->name:d->id);
+                    d->st_ctokens = rrdset_create(RRD_TYPE_TC, id, name, d->family?d->family:d->id, RRD_TYPE_TC ".qos_ctokens", "Class cTokens", "ctokens", 7040, rrd_update_every, RRDSET_TYPE_LINE);
+                }
+            }
+            else {
+                debug(D_TC_LOOP, "TC: Updating _ctokens chart for device '%s'", d->name?d->name:d->id);
+                rrdset_next_plugins(d->st_ctokens);
+
+                // FIXME
+                // update the family
+            }
+
+            for(c = d->classes ; c ; c = c->next) {
+                if(unlikely(!c->updated)) continue;
+
+                if(c->isleaf && c->hasparent) {
+                    if(unlikely(!c->rd_ctokens)) {
+                        c->rd_ctokens = rrddim_find(d->st_ctokens, c->id);
+                        if(unlikely(!c->rd_ctokens)) {
+                            debug(D_TC_LOOP, "TC: Adding to chart '%s', dimension '%s' (name: '%s')", d->st_ctokens->id, c->id, c->name);
+
+                            // new class, we have to add it
+                            c->rd_ctokens = rrddim_add(d->st_ctokens, c->id, c->name?c->name:c->id, 1, 1, RRDDIM_ABSOLUTE);
+                        }
+                        else debug(D_TC_LOOP, "TC: Updating chart '%s', dimension '%s'", d->st_ctokens->id, c->id);
+                    }
+
+                    rrddim_set_by_pointer(d->st_ctokens, c->rd_ctokens, c->ctokens);
+
+                    // if it has a name, different to the id
+                    if(unlikely(c->name_updated && c->name && strcmp(c->id, c->name) != 0)) {
+                        // update the rrd dimension with the new name
+                        debug(D_TC_LOOP, "TC: Setting chart '%s', dimension '%s' name to '%s'", d->st_ctokens->id, c->rd_ctokens->id, c->name);
+                        rrddim_set_name(d->st_ctokens, c->rd_ctokens, c->name);
+                    }
+                }
+            }
+            rrdset_done(d->st_ctokens);
+        }
     }
 
     tc_device_classes_cleanup(d);
@@ -475,7 +616,7 @@ static inline struct tc_device *tc_device_create(char *id)
 
         d->id = strdupz(id);
         d->hash = simple_hash(d->id);
-        d->enabled = -1;
+        d->enabled = (char)-1;
 
         avl_init(&d->classes_index, tc_class_compare);
         tc_device_index_add(d);
diff --git a/src/plugins_d.c b/src/plugins_d.c
index 627cc90e5..0030e2216 100644
--- a/src/plugins_d.c
+++ b/src/plugins_d.c
@@ -109,7 +109,7 @@ void *pluginsd_worker_thread(void *arg)
 
     size_t count = 0;
 
-    while(likely(1)) {
+    for(;;) {
         if(unlikely(netdata_exit)) break;
 
         FILE *fp = mypopen(cd->cmd, &cd->pid);
@@ -358,7 +358,7 @@ void *pluginsd_worker_thread(void *arg)
                 error("PLUGINSD: %s sleeping for %llu. Will kill with SIGCONT pid %d to wake it up.\n", cd->fullfilename, susec, cd->pid);
                 usleep(susec);
                 killpid(cd->pid, SIGCONT);
-                bcopy(&now, &last, sizeof(struct timeval));
+                memmove(&last, &now, sizeof(struct timeval));
                 break;
             }
 #endif
@@ -380,16 +380,9 @@ void *pluginsd_worker_thread(void *arg)
 
         // get the return code
         int code = mypclose(fp, cd->pid);
-
-        if(netdata_exit) {
-            cd->pid = 0;
-            cd->enabled = 0;
-            cd->obsolete = 1;
-            pthread_exit(NULL);
-            return NULL;
-        }
-
-        if(code != 0) {
+        
+        if(unlikely(netdata_exit)) break;
+        else if(code != 0) {
             // the plugin reports failure
 
             if(likely(!cd->successful_collections)) {
@@ -430,10 +423,11 @@ void *pluginsd_worker_thread(void *arg)
         }
         cd->pid = 0;
 
-        if(unlikely(!cd->enabled))
-            break;
+        if(unlikely(!cd->enabled)) break;
     }
 
+    info("PLUGINSD: '%s' thread exiting", cd->fullfilename);
+
     cd->obsolete = 1;
     pthread_exit(NULL);
     return NULL;
@@ -462,7 +456,7 @@ void *pluginsd_main(void *ptr) {
 
     if(scan_frequency < 1) scan_frequency = 1;
 
-    while(likely(1)) {
+    for(;;) {
         if(unlikely(netdata_exit)) break;
 
         dir = opendir(dir_name);
@@ -542,6 +536,8 @@ void *pluginsd_main(void *ptr) {
         sleep((unsigned int) scan_frequency);
     }
 
+    info("PLUGINS.D thread exiting");
+
     pthread_exit(NULL);
     return NULL;
 }
diff --git a/src/popen.c b/src/popen.c
index 193efc0f3..ad8d7596f 100644
--- a/src/popen.c
+++ b/src/popen.c
@@ -147,6 +147,13 @@ int mypclose(FILE *fp, pid_t pid) {
     debug(D_EXIT, "Request to mypclose() on pid %d", pid);
 
     /*mypopen_del(fp);*/
+
+    // close the pipe fd
+    // this is required in musl
+    // without it the childs do not exit
+    close(fileno(fp));
+
+    // close the pipe file pointer
     fclose(fp);
 
     siginfo_t info;
diff --git a/src/proc_interrupts.c b/src/proc_interrupts.c
index fe0e9b1a5..f277a5a90 100644
--- a/src/proc_interrupts.c
+++ b/src/proc_interrupts.c
@@ -21,8 +21,7 @@ static inline struct interrupt *get_interrupts_array(int lines, int cpus) {
     static struct interrupt *irrs = NULL;
     static int allocated = 0;
 
-    if(lines < allocated) return irrs;
-    else {
+    if(lines > allocated) {
         irrs = (struct interrupt *)reallocz(irrs, lines * recordsize(cpus));
         allocated = lines;
     }
@@ -143,15 +142,14 @@ int do_proc_interrupts(int update_every, unsigned long long dt) {
         int c;
 
         for(c = 0; c < cpus ; c++) {
-            char id[256+1];
-            snprintfz(id, 256, "cpu%d_interrupts", c);
+            char id[50+1];
+            snprintfz(id, 50, "cpu%d_interrupts", c);
 
             st = rrdset_find_bytype("cpu", id);
             if(!st) {
-                char name[256+1], title[256+1];
-                snprintfz(name, 256, "cpu%d_interrupts", c);
-                snprintfz(title, 256, "CPU%d Interrupts", c);
-                st = rrdset_create("cpu", id, name, "interrupts", "cpu.interrupts", title, "interrupts/s", 2000 + c, update_every, RRDSET_TYPE_STACKED);
+                char title[100+1];
+                snprintfz(title, 100, "CPU%d Interrupts", c);
+                st = rrdset_create("cpu", id, NULL, "interrupts", "cpu.interrupts", title, "interrupts/s", 1100 + c, update_every, RRDSET_TYPE_STACKED);
 
                 for(l = 0; l < lines ;l++) {
                     struct interrupt *irr = irrindex(irrs, l, cpus);
diff --git a/src/proc_meminfo.c b/src/proc_meminfo.c
index 4295cd6da..999c9538d 100644
--- a/src/proc_meminfo.c
+++ b/src/proc_meminfo.c
@@ -9,14 +9,14 @@ int do_proc_meminfo(int update_every, unsigned long long dt) {
     static int do_ram = -1, do_swap = -1, do_hwcorrupt = -1, do_committed = -1, do_writeback = -1, do_kernel = -1, do_slab = -1;
 
     if(do_ram == -1)        do_ram          = config_get_boolean("plugin:proc:/proc/meminfo", "system ram", 1);
-    if(do_swap == -1)       do_swap         = config_get_boolean("plugin:proc:/proc/meminfo", "system swap", 1);
+    if(do_swap == -1)       do_swap         = config_get_boolean_ondemand("plugin:proc:/proc/meminfo", "system swap", CONFIG_ONDEMAND_ONDEMAND);
     if(do_hwcorrupt == -1)  do_hwcorrupt    = config_get_boolean_ondemand("plugin:proc:/proc/meminfo", "hardware corrupted ECC", CONFIG_ONDEMAND_ONDEMAND);
     if(do_committed == -1)  do_committed    = config_get_boolean("plugin:proc:/proc/meminfo", "committed memory", 1);
     if(do_writeback == -1)  do_writeback    = config_get_boolean("plugin:proc:/proc/meminfo", "writeback memory", 1);
     if(do_kernel == -1)     do_kernel       = config_get_boolean("plugin:proc:/proc/meminfo", "kernel memory", 1);
     if(do_slab == -1)       do_slab         = config_get_boolean("plugin:proc:/proc/meminfo", "slab memory", 1);
 
-    if(dt) {};
+    (void)dt;
 
     if(!ff) {
         char filename[FILENAME_MAX + 1];
@@ -105,15 +105,15 @@ int do_proc_meminfo(int update_every, unsigned long long dt) {
         if(!st) {
             st = rrdset_create("system", "ram", NULL, "ram", NULL, "System RAM", "MB", 200, update_every, RRDSET_TYPE_STACKED);
 
-            rrddim_add(st, "buffers", NULL, 1, 1024, RRDDIM_ABSOLUTE);
+            rrddim_add(st, "free",    NULL, 1, 1024, RRDDIM_ABSOLUTE);
             rrddim_add(st, "used",    NULL, 1, 1024, RRDDIM_ABSOLUTE);
             rrddim_add(st, "cached",  NULL, 1, 1024, RRDDIM_ABSOLUTE);
-            rrddim_add(st, "free",    NULL, 1, 1024, RRDDIM_ABSOLUTE);
+            rrddim_add(st, "buffers", NULL, 1, 1024, RRDDIM_ABSOLUTE);
         }
         else rrdset_next(st);
 
-        rrddim_set(st, "used", MemUsed);
         rrddim_set(st, "free", MemFree);
+        rrddim_set(st, "used", MemUsed);
         rrddim_set(st, "cached", Cached);
         rrddim_set(st, "buffers", Buffers);
         rrdset_done(st);
@@ -123,7 +123,9 @@ int do_proc_meminfo(int update_every, unsigned long long dt) {
 
     unsigned long long SwapUsed = SwapTotal - SwapFree;
 
-    if(do_swap) {
+    if(SwapTotal || SwapUsed || SwapFree || do_swap == CONFIG_ONDEMAND_YES) {
+        do_swap = CONFIG_ONDEMAND_YES;
+
         st = rrdset_find("system.swap");
         if(!st) {
             st = rrdset_create("system", "swap", NULL, "swap", NULL, "System Swap", "MB", 201, update_every, RRDSET_TYPE_STACKED);
diff --git a/src/proc_net_ip_vs_stats.c b/src/proc_net_ip_vs_stats.c
index 96efd7925..de3e0e460 100644
--- a/src/proc_net_ip_vs_stats.c
+++ b/src/proc_net_ip_vs_stats.c
@@ -44,7 +44,7 @@ int do_proc_net_ip_vs_stats(int update_every, unsigned long long dt) {
     if(do_sockets) {
         st = rrdset_find(RRD_TYPE_NET_IPVS ".sockets");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_IPVS, "sockets", NULL, RRD_TYPE_NET_IPVS, NULL, "IPVS New Connections", "connections/s", 1001, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_IPVS, "sockets", NULL, RRD_TYPE_NET_IPVS, NULL, "IPVS New Connections", "connections/s", 3101, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "connections", NULL, 1, 1, RRDDIM_INCREMENTAL);
         }
@@ -59,7 +59,7 @@ int do_proc_net_ip_vs_stats(int update_every, unsigned long long dt) {
     if(do_packets) {
         st = rrdset_find(RRD_TYPE_NET_IPVS ".packets");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_IPVS, "packets", NULL, RRD_TYPE_NET_IPVS, NULL, "IPVS Packets", "packets/s", 1002, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_IPVS, "packets", NULL, RRD_TYPE_NET_IPVS, NULL, "IPVS Packets", "packets/s", 3102, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
             rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
@@ -76,7 +76,7 @@ int do_proc_net_ip_vs_stats(int update_every, unsigned long long dt) {
     if(do_bandwidth) {
         st = rrdset_find(RRD_TYPE_NET_IPVS ".net");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_IPVS, "net", NULL, RRD_TYPE_NET_IPVS, NULL, "IPVS Bandwidth", "kilobits/s", 1000, update_every, RRDSET_TYPE_AREA);
+            st = rrdset_create(RRD_TYPE_NET_IPVS, "net", NULL, RRD_TYPE_NET_IPVS, NULL, "IPVS Bandwidth", "kilobits/s", 3100, update_every, RRDSET_TYPE_AREA);
 
             rrddim_add(st, "received", NULL, 8, 1024, RRDDIM_INCREMENTAL);
             rrddim_add(st, "sent", NULL, -8, 1024, RRDDIM_INCREMENTAL);
diff --git a/src/proc_net_netstat.c b/src/proc_net_netstat.c
index fe1c4d979..ea38acf29 100644
--- a/src/proc_net_netstat.c
+++ b/src/proc_net_netstat.c
@@ -1,177 +1,838 @@
 #include "common.h"
 
+
+struct netstat_columns {
+    char *name;
+    uint32_t hash;
+    unsigned long long value;
+    int multiplier;     // not needed everywhere
+    char *label;        // not needed everywhere
+};
+
+static struct netstat_columns tcpext_data[] = {
+    { "SyncookiesSent", 0, 0, 1, NULL },
+    { "SyncookiesRecv", 0, 0, 1, NULL },
+    { "SyncookiesFailed", 0, 0, 1, NULL },
+    { "EmbryonicRsts", 0, 0, 1, NULL },
+    { "PruneCalled", 0, 0, 1, NULL },
+    { "RcvPruned", 0, 0, 1, NULL },
+    { "OfoPruned", 0, 0, 1, NULL },
+    { "OutOfWindowIcmps", 0, 0, 1, NULL },
+    { "LockDroppedIcmps", 0, 0, 1, NULL },
+    { "ArpFilter", 0, 0, 1, NULL },
+    { "TW", 0, 0, 1, NULL },
+    { "TWRecycled", 0, 0, 1, NULL },
+    { "TWKilled", 0, 0, 1, NULL },
+    { "PAWSPassive", 0, 0, 1, NULL },
+    { "PAWSActive", 0, 0, 1, NULL },
+    { "PAWSEstab", 0, 0, 1, NULL },
+    { "DelayedACKs", 0, 0, 1, NULL },
+    { "DelayedACKLocked", 0, 0, 1, NULL },
+    { "DelayedACKLost", 0, 0, 1, NULL },
+    { "ListenOverflows", 0, 0, 1, NULL },
+    { "ListenDrops", 0, 0, 1, NULL },
+    { "TCPPrequeued", 0, 0, 1, NULL },
+    { "TCPDirectCopyFromBacklog", 0, 0, 1, NULL },
+    { "TCPDirectCopyFromPrequeue", 0, 0, 1, NULL },
+    { "TCPPrequeueDropped", 0, 0, 1, NULL },
+    { "TCPHPHits", 0, 0, 1, NULL },
+    { "TCPHPHitsToUser", 0, 0, 1, NULL },
+    { "TCPPureAcks", 0, 0, 1, NULL },
+    { "TCPHPAcks", 0, 0, 1, NULL },
+    { "TCPRenoRecovery", 0, 0, 1, NULL },
+    { "TCPSackRecovery", 0, 0, 1, NULL },
+    { "TCPSACKReneging", 0, 0, 1, NULL },
+    { "TCPFACKReorder", 0, 0, 1, NULL },
+    { "TCPSACKReorder", 0, 0, 1, NULL },
+    { "TCPRenoReorder", 0, 0, 1, NULL },
+    { "TCPTSReorder", 0, 0, 1, NULL },
+    { "TCPFullUndo", 0, 0, 1, NULL },
+    { "TCPPartialUndo", 0, 0, 1, NULL },
+    { "TCPDSACKUndo", 0, 0, 1, NULL },
+    { "TCPLossUndo", 0, 0, 1, NULL },
+    { "TCPLostRetransmit", 0, 0, 1, NULL },
+    { "TCPRenoFailures", 0, 0, 1, NULL },
+    { "TCPSackFailures", 0, 0, 1, NULL },
+    { "TCPLossFailures", 0, 0, 1, NULL },
+    { "TCPFastRetrans", 0, 0, 1, NULL },
+    { "TCPForwardRetrans", 0, 0, 1, NULL },
+    { "TCPSlowStartRetrans", 0, 0, 1, NULL },
+    { "TCPTimeouts", 0, 0, 1, NULL },
+    { "TCPLossProbes", 0, 0, 1, NULL },
+    { "TCPLossProbeRecovery", 0, 0, 1, NULL },
+    { "TCPRenoRecoveryFail", 0, 0, 1, NULL },
+    { "TCPSackRecoveryFail", 0, 0, 1, NULL },
+    { "TCPSchedulerFailed", 0, 0, 1, NULL },
+    { "TCPRcvCollapsed", 0, 0, 1, NULL },
+    { "TCPDSACKOldSent", 0, 0, 1, NULL },
+    { "TCPDSACKOfoSent", 0, 0, 1, NULL },
+    { "TCPDSACKRecv", 0, 0, 1, NULL },
+    { "TCPDSACKOfoRecv", 0, 0, 1, NULL },
+    { "TCPAbortOnData", 0, 0, 1, NULL },
+    { "TCPAbortOnClose", 0, 0, 1, NULL },
+    { "TCPAbortOnMemory", 0, 0, 1, NULL },
+    { "TCPAbortOnTimeout", 0, 0, 1, NULL },
+    { "TCPAbortOnLinger", 0, 0, 1, NULL },
+    { "TCPAbortFailed", 0, 0, 1, NULL },
+    { "TCPMemoryPressures", 0, 0, 1, NULL },
+    { "TCPSACKDiscard", 0, 0, 1, NULL },
+    { "TCPDSACKIgnoredOld", 0, 0, 1, NULL },
+    { "TCPDSACKIgnoredNoUndo", 0, 0, 1, NULL },
+    { "TCPSpuriousRTOs", 0, 0, 1, NULL },
+    { "TCPMD5NotFound", 0, 0, 1, NULL },
+    { "TCPMD5Unexpected", 0, 0, 1, NULL },
+    { "TCPSackShifted", 0, 0, 1, NULL },
+    { "TCPSackMerged", 0, 0, 1, NULL },
+    { "TCPSackShiftFallback", 0, 0, 1, NULL },
+    { "TCPBacklogDrop", 0, 0, 1, NULL },
+    { "TCPMinTTLDrop", 0, 0, 1, NULL },
+    { "TCPDeferAcceptDrop", 0, 0, 1, NULL },
+    { "IPReversePathFilter", 0, 0, 1, NULL },
+    { "TCPTimeWaitOverflow", 0, 0, 1, NULL },
+    { "TCPReqQFullDoCookies", 0, 0, 1, NULL },
+    { "TCPReqQFullDrop", 0, 0, 1, NULL },
+    { "TCPRetransFail", 0, 0, 1, NULL },
+    { "TCPRcvCoalesce", 0, 0, 1, NULL },
+    { "TCPOFOQueue", 0, 0, 1, NULL },
+    { "TCPOFODrop", 0, 0, 1, NULL },
+    { "TCPOFOMerge", 0, 0, 1, NULL },
+    { "TCPChallengeACK", 0, 0, 1, NULL },
+    { "TCPSYNChallenge", 0, 0, 1, NULL },
+    { "TCPFastOpenActive", 0, 0, 1, NULL },
+    { "TCPFastOpenActiveFail", 0, 0, 1, NULL },
+    { "TCPFastOpenPassive", 0, 0, 1, NULL },
+    { "TCPFastOpenPassiveFail", 0, 0, 1, NULL },
+    { "TCPFastOpenListenOverflow", 0, 0, 1, NULL },
+    { "TCPFastOpenCookieReqd", 0, 0, 1, NULL },
+    { "TCPSpuriousRtxHostQueues", 0, 0, 1, NULL },
+    { "BusyPollRxPackets", 0, 0, 1, NULL },
+    { "TCPAutoCorking", 0, 0, 1, NULL },
+    { "TCPFromZeroWindowAdv", 0, 0, 1, NULL },
+    { "TCPToZeroWindowAdv", 0, 0, 1, NULL },
+    { "TCPWantZeroWindowAdv", 0, 0, 1, NULL },
+    { "TCPSynRetrans", 0, 0, 1, NULL },
+    { "TCPOrigDataSent", 0, 0, 1, NULL },
+    { "TCPHystartTrainDetect", 0, 0, 1, NULL },
+    { "TCPHystartTrainCwnd", 0, 0, 1, NULL },
+    { "TCPHystartDelayDetect", 0, 0, 1, NULL },
+    { "TCPHystartDelayCwnd", 0, 0, 1, NULL },
+    { "TCPACKSkippedSynRecv", 0, 0, 1, NULL },
+    { "TCPACKSkippedPAWS", 0, 0, 1, NULL },
+    { "TCPACKSkippedSeq", 0, 0, 1, NULL },
+    { "TCPACKSkippedFinWait2", 0, 0, 1, NULL },
+    { "TCPACKSkippedTimeWait", 0, 0, 1, NULL },
+    { "TCPACKSkippedChallenge", 0, 0, 1, NULL },
+    { "TCPWinProbe", 0, 0, 1, NULL },
+    { "TCPKeepAlive", 0, 0, 1, NULL },
+    { "TCPMTUPFail", 0, 0, 1, NULL },
+    { "TCPMTUPSuccess", 0, 0, 1, NULL },
+    { NULL, 0, 0, 0, NULL }
+};
+
+static struct netstat_columns ipext_data[] = {
+    { "InNoRoutes", 0, 0, 1, NULL },
+    { "InTruncatedPkts", 0, 0, 1, NULL },
+    { "InMcastPkts", 0, 0, 1, NULL },
+    { "OutMcastPkts", 0, 0, 1, NULL },
+    { "InBcastPkts", 0, 0, 1, NULL },
+    { "OutBcastPkts", 0, 0, 1, NULL },
+    { "InOctets", 0, 0, 1, NULL },
+    { "OutOctets", 0, 0, 1, NULL },
+    { "InMcastOctets", 0, 0, 1, NULL },
+    { "OutMcastOctets", 0, 0, 1, NULL },
+    { "InBcastOctets", 0, 0, 1, NULL },
+    { "OutBcastOctets", 0, 0, 1, NULL },
+    { "InCsumErrors", 0, 0, 1, NULL },
+    { "InNoECTPkts", 0, 0, 1, NULL },
+    { "InECT1Pkts", 0, 0, 1, NULL },
+    { "InECT0Pkts", 0, 0, 1, NULL },
+    { "InCEPkts", 0, 0, 1, NULL },
+    { NULL, 0, 0, 0, NULL }
+};
+
+static void hash_array(struct netstat_columns *nc) {
+    int i;
+
+    for(i = 0; nc[i].name ;i++)
+        nc[i].hash = simple_hash(nc[i].name);
+}
+
+static unsigned long long *netstat_columns_find(struct netstat_columns *nc, const char *name) {
+    uint32_t i, hash = simple_hash(name);
+
+    for(i = 0; nc[i].name ;i++)
+        if(unlikely(nc[i].hash == hash && !strcmp(nc[i].name, name)))
+            return &nc[i].value;
+
+    fatal("Cannot find key '%s' in /proc/net/netstat internal array.", name);
+}
+
+static void parse_line_pair(procfile *ff, struct netstat_columns *nc, uint32_t header_line, uint32_t values_line) {
+    uint32_t hwords = procfile_linewords(ff, header_line);
+    uint32_t vwords = procfile_linewords(ff, values_line);
+    uint32_t w, i;
+
+    if(unlikely(vwords > hwords)) {
+        error("File /proc/net/netstat on header line %u has %u words, but on value line %u has %u words.", header_line, hwords, values_line, vwords);
+        vwords = hwords;
+    }
+
+    for(w = 1; w < vwords ;w++) {
+        char *key = procfile_lineword(ff, header_line, w);
+        uint32_t hash = simple_hash(key);
+
+        for(i = 0 ; nc[i].name ;i++) {
+            if(unlikely(hash == nc[i].hash && !strcmp(key, nc[i].name))) {
+                nc[i].value = strtoull(procfile_lineword(ff, values_line, w), NULL, 10);
+                break;
+            }
+        }
+    }
+}
+
+
 int do_proc_net_netstat(int update_every, unsigned long long dt) {
-    static int do_bandwidth = -1, do_inerrors = -1, do_mcast = -1, do_bcast = -1, do_mcast_p = -1, do_bcast_p = -1;
+    (void)dt;
+
+    static int do_bandwidth = -1, do_inerrors = -1, do_mcast = -1, do_bcast = -1, do_mcast_p = -1, do_bcast_p = -1, do_ecn = -1, \
+        do_tcpext_reorder = -1, do_tcpext_syscookies = -1, do_tcpext_ofo = -1, do_tcpext_connaborts = -1, do_tcpext_memory = -1;
+    static uint32_t hash_ipext = 0, hash_tcpext = 0;
     static procfile *ff = NULL;
 
-    if(do_bandwidth == -1)  do_bandwidth    = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "bandwidth", CONFIG_ONDEMAND_ONDEMAND);
-    if(do_inerrors == -1)   do_inerrors     = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "input errors", CONFIG_ONDEMAND_ONDEMAND);
-    if(do_mcast == -1)      do_mcast        = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "multicast bandwidth", CONFIG_ONDEMAND_ONDEMAND);
-    if(do_bcast == -1)      do_bcast        = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "broadcast bandwidth", CONFIG_ONDEMAND_ONDEMAND);
-    if(do_mcast_p == -1)    do_mcast_p      = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "multicast packets", CONFIG_ONDEMAND_ONDEMAND);
-    if(do_bcast_p == -1)    do_bcast_p      = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "broadcast packets", CONFIG_ONDEMAND_ONDEMAND);
+    static unsigned long long *tcpext_TCPRenoReorder = NULL;
+    static unsigned long long *tcpext_TCPFACKReorder = NULL;
+    static unsigned long long *tcpext_TCPSACKReorder = NULL;
+    static unsigned long long *tcpext_TCPTSReorder = NULL;
+
+    static unsigned long long *tcpext_SyncookiesSent = NULL;
+    static unsigned long long *tcpext_SyncookiesRecv = NULL;
+    static unsigned long long *tcpext_SyncookiesFailed = NULL;
 
-    if(dt) {};
+    static unsigned long long *tcpext_TCPOFOQueue = NULL; // Number of packets queued in OFO queue
+    static unsigned long long *tcpext_TCPOFODrop = NULL;  // Number of packets meant to be queued in OFO but dropped because socket rcvbuf limit hit.
+    static unsigned long long *tcpext_TCPOFOMerge = NULL; // Number of packets in OFO that were merged with other packets.
+    static unsigned long long *tcpext_OfoPruned = NULL;   // packets dropped from out-of-order queue because of socket buffer overrun
+
+    static unsigned long long *tcpext_TCPAbortOnData = NULL;    // connections reset due to unexpected data
+    static unsigned long long *tcpext_TCPAbortOnClose = NULL;   // connections reset due to early user close
+    static unsigned long long *tcpext_TCPAbortOnMemory = NULL;  // connections aborted due to memory pressure
+    static unsigned long long *tcpext_TCPAbortOnTimeout = NULL; // connections aborted due to timeout
+    static unsigned long long *tcpext_TCPAbortOnLinger = NULL;  // connections aborted after user close in linger timeout
+    static unsigned long long *tcpext_TCPAbortFailed = NULL;    // times unable to send RST due to no memory
+
+    static unsigned long long *tcpext_TCPMemoryPressures = NULL;
+
+/*
+    // connection rejects
+    static unsigned long long *tcpext_PAWSActive = NULL;  // active connections rejected because of time stamp
+    static unsigned long long *tcpext_PAWSPassive = NULL; // passive connections rejected because of time stamp
+
+    static unsigned long long *tcpext_TCPTimeouts = NULL;
+
+    static unsigned long long *tcpext_TCPDSACKUndo = NULL;
+    static unsigned long long *tcpext_TCPDSACKOldSent = NULL;
+    static unsigned long long *tcpext_TCPDSACKOfoSent = NULL;
+    static unsigned long long *tcpext_TCPDSACKRecv = NULL;
+    static unsigned long long *tcpext_TCPDSACKOfoRecv = NULL;
+    static unsigned long long *tcpext_TCPDSACKIgnoredOld = NULL;
+    static unsigned long long *tcpext_TCPDSACKIgnoredNoUndo = NULL;
+
+
+    static unsigned long long *tcpext_EmbryonicRsts = NULL;
+
+    static unsigned long long *tcpext_PruneCalled = NULL;
+    static unsigned long long *tcpext_RcvPruned = NULL;
+    static unsigned long long *tcpext_OutOfWindowIcmps = NULL;
+    static unsigned long long *tcpext_LockDroppedIcmps = NULL;
+    static unsigned long long *tcpext_ArpFilter = NULL;
+
+    static unsigned long long *tcpext_TW = NULL;
+    static unsigned long long *tcpext_TWRecycled = NULL;
+    static unsigned long long *tcpext_TWKilled = NULL;
+
+    static unsigned long long *tcpext_PAWSEstab = NULL;
+
+    static unsigned long long *tcpext_DelayedACKs = NULL;
+    static unsigned long long *tcpext_DelayedACKLocked = NULL;
+    static unsigned long long *tcpext_DelayedACKLost = NULL;
+
+    static unsigned long long *tcpext_ListenOverflows = NULL;
+    static unsigned long long *tcpext_ListenDrops = NULL;
+
+    static unsigned long long *tcpext_TCPPrequeued = NULL;
+
+    static unsigned long long *tcpext_TCPDirectCopyFromBacklog = NULL;
+    static unsigned long long *tcpext_TCPDirectCopyFromPrequeue = NULL;
+    static unsigned long long *tcpext_TCPPrequeueDropped = NULL;
+
+    static unsigned long long *tcpext_TCPHPHits = NULL;
+    static unsigned long long *tcpext_TCPHPHitsToUser = NULL;
+    static unsigned long long *tcpext_TCPHPAcks = NULL;
+
+    static unsigned long long *tcpext_TCPPureAcks = NULL;
+    static unsigned long long *tcpext_TCPRenoRecovery = NULL;
+
+    static unsigned long long *tcpext_TCPSackRecovery = NULL;
+    static unsigned long long *tcpext_TCPSackFailures = NULL;
+    static unsigned long long *tcpext_TCPSACKReneging = NULL;
+    static unsigned long long *tcpext_TCPSackRecoveryFail = NULL;
+    static unsigned long long *tcpext_TCPSACKDiscard = NULL;
+    static unsigned long long *tcpext_TCPSackShifted = NULL;
+    static unsigned long long *tcpext_TCPSackMerged = NULL;
+    static unsigned long long *tcpext_TCPSackShiftFallback = NULL;
+
+
+    static unsigned long long *tcpext_TCPFullUndo = NULL;
+    static unsigned long long *tcpext_TCPPartialUndo = NULL;
+
+    static unsigned long long *tcpext_TCPLossUndo = NULL;
+    static unsigned long long *tcpext_TCPLostRetransmit = NULL;
+
+    static unsigned long long *tcpext_TCPRenoFailures = NULL;
+
+    static unsigned long long *tcpext_TCPLossFailures = NULL;
+    static unsigned long long *tcpext_TCPFastRetrans = NULL;
+    static unsigned long long *tcpext_TCPForwardRetrans = NULL;
+    static unsigned long long *tcpext_TCPSlowStartRetrans = NULL;
+    static unsigned long long *tcpext_TCPLossProbes = NULL;
+    static unsigned long long *tcpext_TCPLossProbeRecovery = NULL;
+    static unsigned long long *tcpext_TCPRenoRecoveryFail = NULL;
+    static unsigned long long *tcpext_TCPSchedulerFailed = NULL;
+    static unsigned long long *tcpext_TCPRcvCollapsed = NULL;
+
+    static unsigned long long *tcpext_TCPSpuriousRTOs = NULL;
+    static unsigned long long *tcpext_TCPMD5NotFound = NULL;
+    static unsigned long long *tcpext_TCPMD5Unexpected = NULL;
+
+    static unsigned long long *tcpext_TCPBacklogDrop = NULL;
+    static unsigned long long *tcpext_TCPMinTTLDrop = NULL;
+    static unsigned long long *tcpext_TCPDeferAcceptDrop = NULL;
+    static unsigned long long *tcpext_IPReversePathFilter = NULL;
+    static unsigned long long *tcpext_TCPTimeWaitOverflow = NULL;
+    static unsigned long long *tcpext_TCPReqQFullDoCookies = NULL;
+    static unsigned long long *tcpext_TCPReqQFullDrop = NULL;
+    static unsigned long long *tcpext_TCPRetransFail = NULL;
+    static unsigned long long *tcpext_TCPRcvCoalesce = NULL;
+
+    static unsigned long long *tcpext_TCPChallengeACK = NULL;
+    static unsigned long long *tcpext_TCPSYNChallenge = NULL;
+
+    static unsigned long long *tcpext_TCPFastOpenActive = NULL;
+    static unsigned long long *tcpext_TCPFastOpenActiveFail = NULL;
+    static unsigned long long *tcpext_TCPFastOpenPassive = NULL;
+    static unsigned long long *tcpext_TCPFastOpenPassiveFail = NULL;
+    static unsigned long long *tcpext_TCPFastOpenListenOverflow = NULL;
+    static unsigned long long *tcpext_TCPFastOpenCookieReqd = NULL;
+
+    static unsigned long long *tcpext_TCPSpuriousRtxHostQueues = NULL;
+    static unsigned long long *tcpext_BusyPollRxPackets = NULL;
+    static unsigned long long *tcpext_TCPAutoCorking = NULL;
+    static unsigned long long *tcpext_TCPFromZeroWindowAdv = NULL;
+    static unsigned long long *tcpext_TCPToZeroWindowAdv = NULL;
+    static unsigned long long *tcpext_TCPWantZeroWindowAdv = NULL;
+    static unsigned long long *tcpext_TCPSynRetrans = NULL;
+    static unsigned long long *tcpext_TCPOrigDataSent = NULL;
+
+    static unsigned long long *tcpext_TCPHystartTrainDetect = NULL;
+    static unsigned long long *tcpext_TCPHystartTrainCwnd = NULL;
+    static unsigned long long *tcpext_TCPHystartDelayDetect = NULL;
+    static unsigned long long *tcpext_TCPHystartDelayCwnd = NULL;
+
+    static unsigned long long *tcpext_TCPACKSkippedSynRecv = NULL;
+    static unsigned long long *tcpext_TCPACKSkippedPAWS = NULL;
+    static unsigned long long *tcpext_TCPACKSkippedSeq = NULL;
+    static unsigned long long *tcpext_TCPACKSkippedFinWait2 = NULL;
+    static unsigned long long *tcpext_TCPACKSkippedTimeWait = NULL;
+    static unsigned long long *tcpext_TCPACKSkippedChallenge = NULL;
+
+    static unsigned long long *tcpext_TCPWinProbe = NULL;
+    static unsigned long long *tcpext_TCPKeepAlive = NULL;
+
+    static unsigned long long *tcpext_TCPMTUPFail = NULL;
+    static unsigned long long *tcpext_TCPMTUPSuccess = NULL;
+*/
+
+    static unsigned long long *ipext_InNoRoutes = NULL;
+    static unsigned long long *ipext_InTruncatedPkts = NULL;
+    static unsigned long long *ipext_InMcastPkts = NULL;
+    static unsigned long long *ipext_OutMcastPkts = NULL;
+    static unsigned long long *ipext_InBcastPkts = NULL;
+    static unsigned long long *ipext_OutBcastPkts = NULL;
+    static unsigned long long *ipext_InOctets = NULL;
+    static unsigned long long *ipext_OutOctets = NULL;
+    static unsigned long long *ipext_InMcastOctets = NULL;
+    static unsigned long long *ipext_OutMcastOctets = NULL;
+    static unsigned long long *ipext_InBcastOctets = NULL;
+    static unsigned long long *ipext_OutBcastOctets = NULL;
+    static unsigned long long *ipext_InCsumErrors = NULL;
+    static unsigned long long *ipext_InNoECTPkts = NULL;
+    static unsigned long long *ipext_InECT1Pkts = NULL;
+    static unsigned long long *ipext_InECT0Pkts = NULL;
+    static unsigned long long *ipext_InCEPkts = NULL;
+
+    if(unlikely(do_bandwidth == -1)) {
+        do_bandwidth = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "bandwidth", CONFIG_ONDEMAND_ONDEMAND);
+        do_inerrors  = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "input errors", CONFIG_ONDEMAND_ONDEMAND);
+        do_mcast     = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "multicast bandwidth", CONFIG_ONDEMAND_ONDEMAND);
+        do_bcast     = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "broadcast bandwidth", CONFIG_ONDEMAND_ONDEMAND);
+        do_mcast_p   = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "multicast packets", CONFIG_ONDEMAND_ONDEMAND);
+        do_bcast_p   = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "broadcast packets", CONFIG_ONDEMAND_ONDEMAND);
+        do_ecn       = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "ECN packets", CONFIG_ONDEMAND_ONDEMAND);
+
+        do_tcpext_reorder    = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "TCP reorders", CONFIG_ONDEMAND_ONDEMAND);
+        do_tcpext_syscookies = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "TCP SYN cookies", CONFIG_ONDEMAND_ONDEMAND);
+        do_tcpext_ofo        = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "TCP out-of-order queue", CONFIG_ONDEMAND_ONDEMAND);
+        do_tcpext_connaborts = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "TCP connection aborts", CONFIG_ONDEMAND_ONDEMAND);
+        do_tcpext_memory     = config_get_boolean_ondemand("plugin:proc:/proc/net/netstat", "TCP memory pressures", CONFIG_ONDEMAND_ONDEMAND);
+
+        hash_ipext = simple_hash("IpExt");
+        hash_tcpext = simple_hash("TcpExt");
+
+        hash_array(ipext_data);
+        hash_array(tcpext_data);
+
+        // Reordering
+        tcpext_TCPFACKReorder = netstat_columns_find(tcpext_data, "TCPFACKReorder");
+        tcpext_TCPSACKReorder = netstat_columns_find(tcpext_data, "TCPSACKReorder");
+        tcpext_TCPRenoReorder = netstat_columns_find(tcpext_data, "TCPRenoReorder");
+        tcpext_TCPTSReorder = netstat_columns_find(tcpext_data, "TCPTSReorder");
+
+        // SYN Cookies
+        tcpext_SyncookiesSent = netstat_columns_find(tcpext_data, "SyncookiesSent");
+        tcpext_SyncookiesRecv = netstat_columns_find(tcpext_data, "SyncookiesRecv");
+        tcpext_SyncookiesFailed = netstat_columns_find(tcpext_data, "SyncookiesFailed");
+
+        // Out Of Order Queue
+        // http://www.spinics.net/lists/netdev/msg204696.html
+        tcpext_TCPOFOQueue = netstat_columns_find(tcpext_data, "TCPOFOQueue"); // Number of packets queued in OFO queue
+        tcpext_TCPOFODrop  = netstat_columns_find(tcpext_data, "TCPOFODrop");  // Number of packets meant to be queued in OFO but dropped because socket rcvbuf limit hit.
+        tcpext_TCPOFOMerge = netstat_columns_find(tcpext_data, "TCPOFOMerge"); // Number of packets in OFO that were merged with other packets.
+        tcpext_OfoPruned   = netstat_columns_find(tcpext_data, "OfoPruned");   // packets dropped from out-of-order queue because of socket buffer overrun
+
+        // connection resets
+        // https://github.com/ecki/net-tools/blob/bd8bceaed2311651710331a7f8990c3e31be9840/statistics.c
+        tcpext_TCPAbortOnData    = netstat_columns_find(tcpext_data, "TCPAbortOnData");    // connections reset due to unexpected data
+        tcpext_TCPAbortOnClose   = netstat_columns_find(tcpext_data, "TCPAbortOnClose");   // connections reset due to early user close
+        tcpext_TCPAbortOnMemory  = netstat_columns_find(tcpext_data, "TCPAbortOnMemory");  // connections aborted due to memory pressure
+        tcpext_TCPAbortOnTimeout = netstat_columns_find(tcpext_data, "TCPAbortOnTimeout"); // connections aborted due to timeout
+        tcpext_TCPAbortOnLinger  = netstat_columns_find(tcpext_data, "TCPAbortOnLinger");  // connections aborted after user close in linger timeout
+        tcpext_TCPAbortFailed    = netstat_columns_find(tcpext_data, "TCPAbortFailed");    // times unable to send RST due to no memory
+
+        tcpext_TCPMemoryPressures = netstat_columns_find(tcpext_data, "TCPMemoryPressures");
+
+        /*
+        tcpext_EmbryonicRsts = netstat_columns_find(tcpext_data, "EmbryonicRsts");
+        tcpext_PruneCalled = netstat_columns_find(tcpext_data, "PruneCalled");
+        tcpext_RcvPruned = netstat_columns_find(tcpext_data, "RcvPruned");
+        tcpext_OutOfWindowIcmps = netstat_columns_find(tcpext_data, "OutOfWindowIcmps");
+        tcpext_LockDroppedIcmps = netstat_columns_find(tcpext_data, "LockDroppedIcmps");
+        tcpext_ArpFilter = netstat_columns_find(tcpext_data, "ArpFilter");
+        tcpext_TW = netstat_columns_find(tcpext_data, "TW");
+        tcpext_TWRecycled = netstat_columns_find(tcpext_data, "TWRecycled");
+        tcpext_TWKilled = netstat_columns_find(tcpext_data, "TWKilled");
+        tcpext_PAWSPassive = netstat_columns_find(tcpext_data, "PAWSPassive");
+        tcpext_PAWSActive = netstat_columns_find(tcpext_data, "PAWSActive");
+        tcpext_PAWSEstab = netstat_columns_find(tcpext_data, "PAWSEstab");
+        tcpext_DelayedACKs = netstat_columns_find(tcpext_data, "DelayedACKs");
+        tcpext_DelayedACKLocked = netstat_columns_find(tcpext_data, "DelayedACKLocked");
+        tcpext_DelayedACKLost = netstat_columns_find(tcpext_data, "DelayedACKLost");
+        tcpext_ListenOverflows = netstat_columns_find(tcpext_data, "ListenOverflows");
+        tcpext_ListenDrops = netstat_columns_find(tcpext_data, "ListenDrops");
+        tcpext_TCPPrequeued = netstat_columns_find(tcpext_data, "TCPPrequeued");
+        tcpext_TCPDirectCopyFromBacklog = netstat_columns_find(tcpext_data, "TCPDirectCopyFromBacklog");
+        tcpext_TCPDirectCopyFromPrequeue = netstat_columns_find(tcpext_data, "TCPDirectCopyFromPrequeue");
+        tcpext_TCPPrequeueDropped = netstat_columns_find(tcpext_data, "TCPPrequeueDropped");
+        tcpext_TCPHPHits = netstat_columns_find(tcpext_data, "TCPHPHits");
+        tcpext_TCPHPHitsToUser = netstat_columns_find(tcpext_data, "TCPHPHitsToUser");
+        tcpext_TCPPureAcks = netstat_columns_find(tcpext_data, "TCPPureAcks");
+        tcpext_TCPHPAcks = netstat_columns_find(tcpext_data, "TCPHPAcks");
+        tcpext_TCPRenoRecovery = netstat_columns_find(tcpext_data, "TCPRenoRecovery");
+        tcpext_TCPSackRecovery = netstat_columns_find(tcpext_data, "TCPSackRecovery");
+        tcpext_TCPSACKReneging = netstat_columns_find(tcpext_data, "TCPSACKReneging");
+        tcpext_TCPFullUndo = netstat_columns_find(tcpext_data, "TCPFullUndo");
+        tcpext_TCPPartialUndo = netstat_columns_find(tcpext_data, "TCPPartialUndo");
+        tcpext_TCPDSACKUndo = netstat_columns_find(tcpext_data, "TCPDSACKUndo");
+        tcpext_TCPLossUndo = netstat_columns_find(tcpext_data, "TCPLossUndo");
+        tcpext_TCPLostRetransmit = netstat_columns_find(tcpext_data, "TCPLostRetransmit");
+        tcpext_TCPRenoFailures = netstat_columns_find(tcpext_data, "TCPRenoFailures");
+        tcpext_TCPSackFailures = netstat_columns_find(tcpext_data, "TCPSackFailures");
+        tcpext_TCPLossFailures = netstat_columns_find(tcpext_data, "TCPLossFailures");
+        tcpext_TCPFastRetrans = netstat_columns_find(tcpext_data, "TCPFastRetrans");
+        tcpext_TCPForwardRetrans = netstat_columns_find(tcpext_data, "TCPForwardRetrans");
+        tcpext_TCPSlowStartRetrans = netstat_columns_find(tcpext_data, "TCPSlowStartRetrans");
+        tcpext_TCPTimeouts = netstat_columns_find(tcpext_data, "TCPTimeouts");
+        tcpext_TCPLossProbes = netstat_columns_find(tcpext_data, "TCPLossProbes");
+        tcpext_TCPLossProbeRecovery = netstat_columns_find(tcpext_data, "TCPLossProbeRecovery");
+        tcpext_TCPRenoRecoveryFail = netstat_columns_find(tcpext_data, "TCPRenoRecoveryFail");
+        tcpext_TCPSackRecoveryFail = netstat_columns_find(tcpext_data, "TCPSackRecoveryFail");
+        tcpext_TCPSchedulerFailed = netstat_columns_find(tcpext_data, "TCPSchedulerFailed");
+        tcpext_TCPRcvCollapsed = netstat_columns_find(tcpext_data, "TCPRcvCollapsed");
+        tcpext_TCPDSACKOldSent = netstat_columns_find(tcpext_data, "TCPDSACKOldSent");
+        tcpext_TCPDSACKOfoSent = netstat_columns_find(tcpext_data, "TCPDSACKOfoSent");
+        tcpext_TCPDSACKRecv = netstat_columns_find(tcpext_data, "TCPDSACKRecv");
+        tcpext_TCPDSACKOfoRecv = netstat_columns_find(tcpext_data, "TCPDSACKOfoRecv");
+        tcpext_TCPSACKDiscard = netstat_columns_find(tcpext_data, "TCPSACKDiscard");
+        tcpext_TCPDSACKIgnoredOld = netstat_columns_find(tcpext_data, "TCPDSACKIgnoredOld");
+        tcpext_TCPDSACKIgnoredNoUndo = netstat_columns_find(tcpext_data, "TCPDSACKIgnoredNoUndo");
+        tcpext_TCPSpuriousRTOs = netstat_columns_find(tcpext_data, "TCPSpuriousRTOs");
+        tcpext_TCPMD5NotFound = netstat_columns_find(tcpext_data, "TCPMD5NotFound");
+        tcpext_TCPMD5Unexpected = netstat_columns_find(tcpext_data, "TCPMD5Unexpected");
+        tcpext_TCPSackShifted = netstat_columns_find(tcpext_data, "TCPSackShifted");
+        tcpext_TCPSackMerged = netstat_columns_find(tcpext_data, "TCPSackMerged");
+        tcpext_TCPSackShiftFallback = netstat_columns_find(tcpext_data, "TCPSackShiftFallback");
+        tcpext_TCPBacklogDrop = netstat_columns_find(tcpext_data, "TCPBacklogDrop");
+        tcpext_TCPMinTTLDrop = netstat_columns_find(tcpext_data, "TCPMinTTLDrop");
+        tcpext_TCPDeferAcceptDrop = netstat_columns_find(tcpext_data, "TCPDeferAcceptDrop");
+        tcpext_IPReversePathFilter = netstat_columns_find(tcpext_data, "IPReversePathFilter");
+        tcpext_TCPTimeWaitOverflow = netstat_columns_find(tcpext_data, "TCPTimeWaitOverflow");
+        tcpext_TCPReqQFullDoCookies = netstat_columns_find(tcpext_data, "TCPReqQFullDoCookies");
+        tcpext_TCPReqQFullDrop = netstat_columns_find(tcpext_data, "TCPReqQFullDrop");
+        tcpext_TCPRetransFail = netstat_columns_find(tcpext_data, "TCPRetransFail");
+        tcpext_TCPRcvCoalesce = netstat_columns_find(tcpext_data, "TCPRcvCoalesce");
+        tcpext_TCPChallengeACK = netstat_columns_find(tcpext_data, "TCPChallengeACK");
+        tcpext_TCPSYNChallenge = netstat_columns_find(tcpext_data, "TCPSYNChallenge");
+        tcpext_TCPFastOpenActive = netstat_columns_find(tcpext_data, "TCPFastOpenActive");
+        tcpext_TCPFastOpenActiveFail = netstat_columns_find(tcpext_data, "TCPFastOpenActiveFail");
+        tcpext_TCPFastOpenPassive = netstat_columns_find(tcpext_data, "TCPFastOpenPassive");
+        tcpext_TCPFastOpenPassiveFail = netstat_columns_find(tcpext_data, "TCPFastOpenPassiveFail");
+        tcpext_TCPFastOpenListenOverflow = netstat_columns_find(tcpext_data, "TCPFastOpenListenOverflow");
+        tcpext_TCPFastOpenCookieReqd = netstat_columns_find(tcpext_data, "TCPFastOpenCookieReqd");
+        tcpext_TCPSpuriousRtxHostQueues = netstat_columns_find(tcpext_data, "TCPSpuriousRtxHostQueues");
+        tcpext_BusyPollRxPackets = netstat_columns_find(tcpext_data, "BusyPollRxPackets");
+        tcpext_TCPAutoCorking = netstat_columns_find(tcpext_data, "TCPAutoCorking");
+        tcpext_TCPFromZeroWindowAdv = netstat_columns_find(tcpext_data, "TCPFromZeroWindowAdv");
+        tcpext_TCPToZeroWindowAdv = netstat_columns_find(tcpext_data, "TCPToZeroWindowAdv");
+        tcpext_TCPWantZeroWindowAdv = netstat_columns_find(tcpext_data, "TCPWantZeroWindowAdv");
+        tcpext_TCPSynRetrans = netstat_columns_find(tcpext_data, "TCPSynRetrans");
+        tcpext_TCPOrigDataSent = netstat_columns_find(tcpext_data, "TCPOrigDataSent");
+        tcpext_TCPHystartTrainDetect = netstat_columns_find(tcpext_data, "TCPHystartTrainDetect");
+        tcpext_TCPHystartTrainCwnd = netstat_columns_find(tcpext_data, "TCPHystartTrainCwnd");
+        tcpext_TCPHystartDelayDetect = netstat_columns_find(tcpext_data, "TCPHystartDelayDetect");
+        tcpext_TCPHystartDelayCwnd = netstat_columns_find(tcpext_data, "TCPHystartDelayCwnd");
+        tcpext_TCPACKSkippedSynRecv = netstat_columns_find(tcpext_data, "TCPACKSkippedSynRecv");
+        tcpext_TCPACKSkippedPAWS = netstat_columns_find(tcpext_data, "TCPACKSkippedPAWS");
+        tcpext_TCPACKSkippedSeq = netstat_columns_find(tcpext_data, "TCPACKSkippedSeq");
+        tcpext_TCPACKSkippedFinWait2 = netstat_columns_find(tcpext_data, "TCPACKSkippedFinWait2");
+        tcpext_TCPACKSkippedTimeWait = netstat_columns_find(tcpext_data, "TCPACKSkippedTimeWait");
+        tcpext_TCPACKSkippedChallenge = netstat_columns_find(tcpext_data, "TCPACKSkippedChallenge");
+        tcpext_TCPWinProbe = netstat_columns_find(tcpext_data, "TCPWinProbe");
+        tcpext_TCPKeepAlive = netstat_columns_find(tcpext_data, "TCPKeepAlive");
+        tcpext_TCPMTUPFail = netstat_columns_find(tcpext_data, "TCPMTUPFail");
+        tcpext_TCPMTUPSuccess = netstat_columns_find(tcpext_data, "TCPMTUPSuccess");
+*/
+        ipext_InNoRoutes = netstat_columns_find(ipext_data, "InNoRoutes");
+        ipext_InTruncatedPkts = netstat_columns_find(ipext_data, "InTruncatedPkts");
+        ipext_InMcastPkts = netstat_columns_find(ipext_data, "InMcastPkts");
+        ipext_OutMcastPkts = netstat_columns_find(ipext_data, "OutMcastPkts");
+        ipext_InBcastPkts = netstat_columns_find(ipext_data, "InBcastPkts");
+        ipext_OutBcastPkts = netstat_columns_find(ipext_data, "OutBcastPkts");
+        ipext_InOctets = netstat_columns_find(ipext_data, "InOctets");
+        ipext_OutOctets = netstat_columns_find(ipext_data, "OutOctets");
+        ipext_InMcastOctets = netstat_columns_find(ipext_data, "InMcastOctets");
+        ipext_OutMcastOctets = netstat_columns_find(ipext_data, "OutMcastOctets");
+        ipext_InBcastOctets = netstat_columns_find(ipext_data, "InBcastOctets");
+        ipext_OutBcastOctets = netstat_columns_find(ipext_data, "OutBcastOctets");
+        ipext_InCsumErrors = netstat_columns_find(ipext_data, "InCsumErrors");
+        ipext_InNoECTPkts = netstat_columns_find(ipext_data, "InNoECTPkts");
+        ipext_InECT1Pkts = netstat_columns_find(ipext_data, "InECT1Pkts");
+        ipext_InECT0Pkts = netstat_columns_find(ipext_data, "InECT0Pkts");
+        ipext_InCEPkts = netstat_columns_find(ipext_data, "InCEPkts");
+    }
 
-    if(!ff) {
+    if(unlikely(!ff)) {
         char filename[FILENAME_MAX + 1];
         snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/netstat");
         ff = procfile_open(config_get("plugin:proc:/proc/net/netstat", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
     }
-    if(!ff) return 1;
+    if(unlikely(!ff)) return 1;
 
     ff = procfile_readall(ff);
-    if(!ff) return 0; // we return 0, so that we will retry to open it next time
+    if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
 
     uint32_t lines = procfile_lines(ff), l;
     uint32_t words;
 
     for(l = 0; l < lines ;l++) {
-        if(strcmp(procfile_lineword(ff, l, 0), "IpExt") == 0) {
-            l++; // we need the next line
+        char *key = procfile_lineword(ff, l, 0);
+        uint32_t hash = simple_hash(key);
+
+        if(unlikely(hash == hash_ipext && strcmp(key, "IpExt") == 0)) {
+            uint32_t h = l++;
 
             if(strcmp(procfile_lineword(ff, l, 0), "IpExt") != 0) {
                 error("Cannot read IpExt line from /proc/net/netstat.");
                 break;
             }
             words = procfile_linewords(ff, l);
-            if(words < 12) {
-                error("Cannot read /proc/net/netstat IpExt line. Expected 12 params, read %u.", words);
+            if(words < 2) {
+                error("Cannot read /proc/net/netstat IpExt line. Expected 2+ params, read %u.", words);
                 continue;
             }
 
-            unsigned long long
-                InNoRoutes = 0, InTruncatedPkts = 0,
-                InOctets = 0,  InMcastPkts = 0,  InBcastPkts = 0,  InMcastOctets = 0,  InBcastOctets = 0,
-                OutOctets = 0, OutMcastPkts = 0, OutBcastPkts = 0, OutMcastOctets = 0, OutBcastOctets = 0;
-
-            InNoRoutes          = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
-            InTruncatedPkts     = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
-            InMcastPkts         = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
-            OutMcastPkts        = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
-            InBcastPkts         = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
-            OutBcastPkts        = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
-            InOctets            = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
-            OutOctets           = strtoull(procfile_lineword(ff, l, 8), NULL, 10);
-            InMcastOctets       = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
-            OutMcastOctets      = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
-            InBcastOctets       = strtoull(procfile_lineword(ff, l, 11), NULL, 10);
-            OutBcastOctets      = strtoull(procfile_lineword(ff, l, 12), NULL, 10);
+            parse_line_pair(ff, ipext_data, h, l);
 
             RRDSET *st;
 
             // --------------------------------------------------------------------
 
-            if(do_bandwidth == CONFIG_ONDEMAND_YES || (do_bandwidth == CONFIG_ONDEMAND_ONDEMAND && (InOctets || OutOctets))) {
+            if(do_bandwidth == CONFIG_ONDEMAND_YES || (do_bandwidth == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InOctets || *ipext_OutOctets))) {
                 do_bandwidth = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("system.ipv4");
                 if(!st) {
                     st = rrdset_create("system", "ipv4", NULL, "network", NULL, "IPv4 Bandwidth", "kilobits/s", 500, update_every, RRDSET_TYPE_AREA);
 
-                    rrddim_add(st, "received", NULL, 8, 1024, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -8, 1024, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InOctets", "received", 8, 1024, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutOctets", "sent", -8, 1024, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "sent", OutOctets);
-                rrddim_set(st, "received", InOctets);
+                rrddim_set(st, "InOctets", *ipext_InOctets);
+                rrddim_set(st, "OutOctets", *ipext_OutOctets);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_inerrors == CONFIG_ONDEMAND_YES || (do_inerrors == CONFIG_ONDEMAND_ONDEMAND && (InNoRoutes || InTruncatedPkts))) {
+            if(do_inerrors == CONFIG_ONDEMAND_YES || (do_inerrors == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InNoRoutes || *ipext_InTruncatedPkts))) {
                 do_inerrors = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.inerrors");
                 if(!st) {
                     st = rrdset_create("ipv4", "inerrors", NULL, "errors", NULL, "IPv4 Input Errors", "packets/s", 4000, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "noroutes", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "truncated", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InNoRoutes", "noroutes", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InTruncatedPkts", "truncated", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InCsumErrors", "checksum", 1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "noroutes", InNoRoutes);
-                rrddim_set(st, "truncated", InTruncatedPkts);
+                rrddim_set(st, "InNoRoutes", *ipext_InNoRoutes);
+                rrddim_set(st, "InTruncatedPkts", *ipext_InTruncatedPkts);
+                rrddim_set(st, "InCsumErrors", *ipext_InCsumErrors);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_mcast == CONFIG_ONDEMAND_YES || (do_mcast == CONFIG_ONDEMAND_ONDEMAND && (InMcastOctets || OutMcastOctets))) {
+            if(do_mcast == CONFIG_ONDEMAND_YES || (do_mcast == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InMcastOctets || *ipext_OutMcastOctets))) {
                 do_mcast = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.mcast");
                 if(!st) {
                     st = rrdset_create("ipv4", "mcast", NULL, "multicast", NULL, "IPv4 Multicast Bandwidth", "kilobits/s", 9000, update_every, RRDSET_TYPE_AREA);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "received", NULL, 8, 1024, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -8, 1024, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InMcastOctets", "received", 8, 1024, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutMcastOctets", "sent", -8, 1024, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "sent", OutMcastOctets);
-                rrddim_set(st, "received", InMcastOctets);
+                rrddim_set(st, "InMcastOctets", *ipext_InMcastOctets);
+                rrddim_set(st, "OutMcastOctets", *ipext_OutMcastOctets);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_bcast == CONFIG_ONDEMAND_YES || (do_bcast == CONFIG_ONDEMAND_ONDEMAND && (InBcastOctets || OutBcastOctets))) {
+            if(do_bcast == CONFIG_ONDEMAND_YES || (do_bcast == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InBcastOctets || *ipext_OutBcastOctets))) {
                 do_bcast = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.bcast");
                 if(!st) {
                     st = rrdset_create("ipv4", "bcast", NULL, "broadcast", NULL, "IPv4 Broadcast Bandwidth", "kilobits/s", 8000, update_every, RRDSET_TYPE_AREA);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "received", NULL, 8, 1024, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -8, 1024, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InBcastOctets", "received", 8, 1024, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutBcastOctets", "sent", -8, 1024, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "sent", OutBcastOctets);
-                rrddim_set(st, "received", InBcastOctets);
+                rrddim_set(st, "InBcastOctets", *ipext_InBcastOctets);
+                rrddim_set(st, "OutBcastOctets", *ipext_OutBcastOctets);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_mcast_p == CONFIG_ONDEMAND_YES || (do_mcast_p == CONFIG_ONDEMAND_ONDEMAND && (InMcastPkts || OutMcastPkts))) {
+            if(do_mcast_p == CONFIG_ONDEMAND_YES || (do_mcast_p == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InMcastPkts || *ipext_OutMcastPkts))) {
                 do_mcast_p = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.mcastpkts");
                 if(!st) {
-                    st = rrdset_create("ipv4", "mcastpkts", NULL, "multicast", NULL, "IPv4 Multicast Packets", "packets/s", 9500, update_every, RRDSET_TYPE_LINE);
+                    st = rrdset_create("ipv4", "mcastpkts", NULL, "multicast", NULL, "IPv4 Multicast Packets", "packets/s", 8600, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InMcastPkts", "received", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutMcastPkts", "sent", -1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "sent", OutMcastPkts);
-                rrddim_set(st, "received", InMcastPkts);
+                rrddim_set(st, "InMcastPkts", *ipext_InMcastPkts);
+                rrddim_set(st, "OutMcastPkts", *ipext_OutMcastPkts);
                 rrdset_done(st);
             }
 
             // --------------------------------------------------------------------
 
-            if(do_bcast_p == CONFIG_ONDEMAND_YES || (do_bcast_p == CONFIG_ONDEMAND_ONDEMAND && (InBcastPkts || OutBcastPkts))) {
+            if(do_bcast_p == CONFIG_ONDEMAND_YES || (do_bcast_p == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InBcastPkts || *ipext_OutBcastPkts))) {
                 do_bcast_p = CONFIG_ONDEMAND_YES;
                 st = rrdset_find("ipv4.bcastpkts");
                 if(!st) {
                     st = rrdset_create("ipv4", "bcastpkts", NULL, "broadcast", NULL, "IPv4 Broadcast Packets", "packets/s", 8500, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InBcastPkts", "received", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutBcastPkts", "sent", -1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "InBcastPkts", *ipext_InBcastPkts);
+                rrddim_set(st, "OutBcastPkts", *ipext_OutBcastPkts);
+                rrdset_done(st);
+            }
+
+            // --------------------------------------------------------------------
+
+            if(do_ecn == CONFIG_ONDEMAND_YES || (do_ecn == CONFIG_ONDEMAND_ONDEMAND && (*ipext_InCEPkts || *ipext_InECT0Pkts || *ipext_InECT1Pkts || *ipext_InNoECTPkts))) {
+                do_ecn = CONFIG_ONDEMAND_YES;
+                st = rrdset_find("ipv4.ecnpkts");
+                if(!st) {
+                    st = rrdset_create("ipv4", "ecnpkts", NULL, "ecn", NULL, "IPv4 ECN Statistics", "packets/s", 8700, update_every, RRDSET_TYPE_LINE);
+                    st->isdetail = 1;
+
+                    rrddim_add(st, "InCEPkts", "CEP", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InNoECTPkts", "NoECTP", -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InECT0Pkts", "ECTP0", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InECT1Pkts", "ECTP1", 1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "InCEPkts", *ipext_InCEPkts);
+                rrddim_set(st, "InNoECTPkts", *ipext_InNoECTPkts);
+                rrddim_set(st, "InECT0Pkts", *ipext_InECT0Pkts);
+                rrddim_set(st, "InECT1Pkts", *ipext_InECT1Pkts);
+                rrdset_done(st);
+            }
+        }
+        else if(unlikely(hash == hash_tcpext && strcmp(key, "TcpExt") == 0)) {
+            uint32_t h = l++;
+
+            if(strcmp(procfile_lineword(ff, l, 0), "TcpExt") != 0) {
+                error("Cannot read TcpExt line from /proc/net/netstat.");
+                break;
+            }
+            words = procfile_linewords(ff, l);
+            if(words < 2) {
+                error("Cannot read /proc/net/netstat TcpExt line. Expected 2+ params, read %u.", words);
+                continue;
+            }
+
+            parse_line_pair(ff, tcpext_data, h, l);
+
+            RRDSET *st;
+
+            // --------------------------------------------------------------------
+
+            if(do_tcpext_memory == CONFIG_ONDEMAND_YES || (do_tcpext_memory == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPMemoryPressures))) {
+                do_tcpext_memory = CONFIG_ONDEMAND_YES;
+                st = rrdset_find("ipv4.tcpmemorypressures");
+                if(!st) {
+                    st = rrdset_create("ipv4", "tcpmemorypressures", NULL, "tcp", NULL, "TCP Memory Pressures", "events/s", 3000, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "TCPMemoryPressures",   "pressures",  1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "TCPMemoryPressures", *tcpext_TCPMemoryPressures);
+                rrdset_done(st);
+            }
+
+            // --------------------------------------------------------------------
+
+            if(do_tcpext_connaborts == CONFIG_ONDEMAND_YES || (do_tcpext_connaborts == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPAbortOnData || *tcpext_TCPAbortOnClose || *tcpext_TCPAbortOnMemory || *tcpext_TCPAbortOnTimeout || *tcpext_TCPAbortOnLinger || *tcpext_TCPAbortFailed))) {
+                do_tcpext_connaborts = CONFIG_ONDEMAND_YES;
+                st = rrdset_find("ipv4.tcpconnaborts");
+                if(!st) {
+                    st = rrdset_create("ipv4", "tcpconnaborts", NULL, "tcp", NULL, "TCP Connection Aborts", "connections/s", 3010, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "TCPAbortOnData",    "baddata",     1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPAbortOnClose",   "userclosed",  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPAbortOnMemory",  "nomemory",    1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPAbortOnTimeout", "timeout",     1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPAbortOnLinger",  "linger",      1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPAbortFailed",    "failed",     -1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "TCPAbortOnData",    *tcpext_TCPAbortOnData);
+                rrddim_set(st, "TCPAbortOnClose",   *tcpext_TCPAbortOnClose);
+                rrddim_set(st, "TCPAbortOnMemory",  *tcpext_TCPAbortOnMemory);
+                rrddim_set(st, "TCPAbortOnTimeout", *tcpext_TCPAbortOnTimeout);
+                rrddim_set(st, "TCPAbortOnLinger",  *tcpext_TCPAbortOnLinger);
+                rrddim_set(st, "TCPAbortFailed",    *tcpext_TCPAbortFailed);
+                rrdset_done(st);
+            }
+            // --------------------------------------------------------------------
+
+            if(do_tcpext_reorder == CONFIG_ONDEMAND_YES || (do_tcpext_reorder == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPRenoReorder || *tcpext_TCPFACKReorder || *tcpext_TCPSACKReorder || *tcpext_TCPTSReorder))) {
+                do_tcpext_reorder = CONFIG_ONDEMAND_YES;
+                st = rrdset_find("ipv4.tcpreorders");
+                if(!st) {
+                    st = rrdset_create("ipv4", "tcpreorders", NULL, "tcp", NULL, "TCP Reordered Packets by Detection Method", "packets/s", 3020, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "TCPTSReorder",   "timestamp",   1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPSACKReorder", "sack",        1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPFACKReorder", "fack",        1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPRenoReorder", "reno",        1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "TCPTSReorder",   *tcpext_TCPTSReorder);
+                rrddim_set(st, "TCPSACKReorder", *tcpext_TCPSACKReorder);
+                rrddim_set(st, "TCPFACKReorder", *tcpext_TCPFACKReorder);
+                rrddim_set(st, "TCPRenoReorder", *tcpext_TCPRenoReorder);
+                rrdset_done(st);
+            }
+
+            // --------------------------------------------------------------------
+
+            if(do_tcpext_ofo == CONFIG_ONDEMAND_YES || (do_tcpext_ofo == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_TCPOFOQueue || *tcpext_TCPOFODrop || *tcpext_TCPOFOMerge))) {
+                do_tcpext_ofo = CONFIG_ONDEMAND_YES;
+                st = rrdset_find("ipv4.tcpofo");
+                if(!st) {
+                    st = rrdset_create("ipv4", "tcpofo", NULL, "tcp", NULL, "TCP Out-Of-Order Queue", "packets/s", 3050, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "TCPOFOQueue", "inqueue",  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPOFODrop",  "dropped", -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "TCPOFOMerge", "merged",   1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OfoPruned",   "pruned",  -1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "sent", OutBcastPkts);
-                rrddim_set(st, "received", InBcastPkts);
+                rrddim_set(st, "TCPOFOQueue",   *tcpext_TCPOFOQueue);
+                rrddim_set(st, "TCPOFODrop",    *tcpext_TCPOFODrop);
+                rrddim_set(st, "TCPOFOMerge",   *tcpext_TCPOFOMerge);
+                rrddim_set(st, "OfoPruned",     *tcpext_OfoPruned);
                 rrdset_done(st);
             }
+
+            // --------------------------------------------------------------------
+
+            if(do_tcpext_syscookies == CONFIG_ONDEMAND_YES || (do_tcpext_syscookies == CONFIG_ONDEMAND_ONDEMAND && (*tcpext_SyncookiesSent || *tcpext_SyncookiesRecv || *tcpext_SyncookiesFailed))) {
+                do_tcpext_syscookies = CONFIG_ONDEMAND_YES;
+                st = rrdset_find("ipv4.tcpsyncookies");
+                if(!st) {
+                    st = rrdset_create("ipv4", "tcpsyncookies", NULL, "tcp", NULL, "TCP SYN Cookies", "packets/s", 3100, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "SyncookiesRecv",   "received",  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "SyncookiesSent",   "sent",     -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "SyncookiesFailed", "failed",   -1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "SyncookiesRecv",   *tcpext_SyncookiesRecv);
+                rrddim_set(st, "SyncookiesSent",   *tcpext_SyncookiesSent);
+                rrddim_set(st, "SyncookiesFailed", *tcpext_SyncookiesFailed);
+                rrdset_done(st);
+            }
+
         }
     }
 
diff --git a/src/proc_net_rpc_nfs.c b/src/proc_net_rpc_nfs.c
new file mode 100644
index 000000000..98acdd814
--- /dev/null
+++ b/src/proc_net_rpc_nfs.c
@@ -0,0 +1,370 @@
+#include "common.h"
+
+struct nfs_procs {
+    char name[30];
+    unsigned long long value;
+    int present;
+};
+
+struct nfs_procs nfs_proc2_values[] = {
+    { "null", 0ULL, 0 },
+    { "getattr", 0ULL, 0 },
+    { "setattr", 0ULL, 0 },
+    { "root", 0ULL, 0 },
+    { "lookup", 0ULL, 0 },
+    { "readlink", 0ULL, 0 },
+    { "read", 0ULL, 0 },
+    { "wrcache", 0ULL, 0 },
+    { "write", 0ULL, 0 },
+    { "create", 0ULL, 0 },
+    { "remove", 0ULL, 0 },
+    { "rename", 0ULL, 0 },
+    { "link", 0ULL, 0 },
+    { "symlink", 0ULL, 0 },
+    { "mkdir", 0ULL, 0 },
+    { "rmdir", 0ULL, 0 },
+    { "readdir", 0ULL, 0 },
+    { "fsstat", 0ULL, 0 },
+    
+    /* termination */
+    { "", 0ULL, 0 }
+};
+
+struct nfs_procs nfs_proc3_values[] = {
+    { "null", 0ULL, 0 },
+    { "getattr", 0ULL, 0 },
+    { "setattr", 0ULL, 0 },
+    { "lookup", 0ULL, 0 },
+    { "access", 0ULL, 0 },
+    { "readlink", 0ULL, 0 },
+    { "read", 0ULL, 0 },
+    { "write", 0ULL, 0 },
+    { "create", 0ULL, 0 },
+    { "mkdir", 0ULL, 0 },
+    { "symlink", 0ULL, 0 },
+    { "mknod", 0ULL, 0 },
+    { "remove", 0ULL, 0 },
+    { "rmdir", 0ULL, 0 },
+    { "rename", 0ULL, 0 },
+    { "link", 0ULL, 0 },
+    { "readdir", 0ULL, 0 },
+    { "readdirplus", 0ULL, 0 },
+    { "fsstat", 0ULL, 0 },
+    { "fsinfo", 0ULL, 0 },
+    { "pathconf", 0ULL, 0 },
+    { "commit", 0ULL, 0 },
+
+    /* termination */
+    { "", 0ULL, 0 }
+};
+
+struct nfs_procs nfs_proc4_values[] = {
+    { "null", 0ULL, 0 },
+    { "read", 0ULL, 0 },
+    { "write", 0ULL, 0 },
+    { "commit", 0ULL, 0 },
+    { "open", 0ULL, 0 },
+    { "open_conf", 0ULL, 0 },
+    { "open_noat", 0ULL, 0 },
+    { "open_dgrd", 0ULL, 0 },
+    { "close", 0ULL, 0 },
+    { "setattr", 0ULL, 0 },
+    { "fsinfo", 0ULL, 0 },
+    { "renew", 0ULL, 0 },
+    { "setclntid", 0ULL, 0 },
+    { "confirm", 0ULL, 0 },
+    { "lock", 0ULL, 0 },
+    { "lockt", 0ULL, 0 },
+    { "locku", 0ULL, 0 },
+    { "access", 0ULL, 0 },
+    { "getattr", 0ULL, 0 },
+    { "lookup", 0ULL, 0 },
+    { "lookup_root", 0ULL, 0 },
+    { "remove", 0ULL, 0 },
+    { "rename", 0ULL, 0 },
+    { "link", 0ULL, 0 },
+    { "symlink", 0ULL, 0 },
+    { "create", 0ULL, 0 },
+    { "pathconf", 0ULL, 0 },
+    { "statfs", 0ULL, 0 },
+    { "readlink", 0ULL, 0 },
+    { "readdir", 0ULL, 0 },
+    { "server_caps", 0ULL, 0 },
+    { "delegreturn", 0ULL, 0 },
+    { "getacl", 0ULL, 0 },
+    { "setacl", 0ULL, 0 },
+    { "fs_locations", 0ULL, 0 },
+    { "rel_lkowner", 0ULL, 0 },
+    { "secinfo", 0ULL, 0 },
+    { "fsid_present", 0ULL, 0 },
+
+    /* nfsv4.1 client ops */
+    { "exchange_id", 0ULL, 0 },
+    { "create_session", 0ULL, 0 },
+    { "destroy_session", 0ULL, 0 },
+    { "sequence", 0ULL, 0 },
+    { "get_lease_time", 0ULL, 0 },
+    { "reclaim_comp", 0ULL, 0 },
+    { "layoutget", 0ULL, 0 },
+    { "getdevinfo", 0ULL, 0 },
+    { "layoutcommit", 0ULL, 0 },
+    { "layoutreturn", 0ULL, 0 },
+    { "secinfo_no", 0ULL, 0 },
+    { "test_stateid", 0ULL, 0 },
+    { "free_stateid", 0ULL, 0 },
+    { "getdevicelist", 0ULL, 0 },
+    { "bind_conn_to_ses", 0ULL, 0 },
+    { "destroy_clientid", 0ULL, 0 },
+
+    /* nfsv4.2 client ops */
+    { "seek", 0ULL, 0 },
+    { "allocate", 0ULL, 0 },
+    { "deallocate", 0ULL, 0 },
+    { "layoutstats", 0ULL, 0 },
+    { "clone", 0ULL, 0 },
+
+    /* termination */
+    { "", 0ULL, 0 }
+};
+
+int do_proc_net_rpc_nfs(int update_every, unsigned long long dt) {
+    (void)dt;
+
+    static procfile *ff = NULL;
+    static int do_net = -1, do_rpc = -1, do_proc2 = -1, do_proc3 = -1, do_proc4 = -1;
+    static int proc2_warning = 0, proc3_warning = 0, proc4_warning = 0;
+
+    if(!ff) {
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/rpc/nfs");
+        ff = procfile_open(config_get("plugin:proc:/proc/net/rpc/nfs", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
+    }
+    if(!ff) return 1;
+
+    ff = procfile_readall(ff);
+    if(!ff) return 0; // we return 0, so that we will retry to open it next time
+
+    if(do_net == -1) do_net = config_get_boolean("plugin:proc:/proc/net/rpc/nfs", "network", 1);
+    if(do_rpc == -1) do_rpc = config_get_boolean("plugin:proc:/proc/net/rpc/nfs", "rpc", 1);
+    if(do_proc2 == -1) do_proc2 = config_get_boolean("plugin:proc:/proc/net/rpc/nfs", "NFS v2 procedures", 1);
+    if(do_proc3 == -1) do_proc3 = config_get_boolean("plugin:proc:/proc/net/rpc/nfs", "NFS v3 procedures", 1);
+    if(do_proc4 == -1) do_proc4 = config_get_boolean("plugin:proc:/proc/net/rpc/nfs", "NFS v4 procedures", 1);
+
+    // if they are enabled, reset them to 1
+    // later we do them =2 to avoid doing strcmp for all lines
+    if(do_net) do_net = 1;
+    if(do_rpc) do_rpc = 1;
+    if(do_proc2) do_proc2 = 1;
+    if(do_proc3) do_proc3 = 1;
+    if(do_proc4) do_proc4 = 1;
+
+    uint32_t lines = procfile_lines(ff), l;
+    uint32_t words;
+
+    char *type;
+    unsigned long long net_count = 0, net_udp_count = 0, net_tcp_count = 0, net_tcp_connections = 0;
+    unsigned long long rpc_calls = 0, rpc_retransmits = 0, rpc_auth_refresh = 0;
+
+    for(l = 0; l < lines ;l++) {
+        words = procfile_linewords(ff, l);
+        if(!words) continue;
+
+        type        = procfile_lineword(ff, l, 0);
+
+        if(do_net == 1 && strcmp(type, "net") == 0) {
+            if(words < 5) {
+                error("%s line of /proc/net/rpc/nfs has %u words, expected %d", type, words, 5);
+                continue;
+            }
+
+            net_count = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
+            net_udp_count = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
+            net_tcp_count = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
+            net_tcp_connections = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
+
+            unsigned long long sum = net_count + net_udp_count + net_tcp_count + net_tcp_connections;
+            if(sum == 0ULL) do_net = -1;
+            else do_net = 2;
+        }
+        else if(do_rpc == 1 && strcmp(type, "rpc") == 0) {
+            if(words < 4) {
+                error("%s line of /proc/net/rpc/nfs has %u words, expected %d", type, words, 6);
+                continue;
+            }
+
+            rpc_calls = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
+            rpc_retransmits = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
+            rpc_auth_refresh = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
+
+            unsigned long long sum = rpc_calls + rpc_retransmits + rpc_auth_refresh;
+            if(sum == 0ULL) do_rpc = -1;
+            else do_rpc = 2;
+        }
+        else if(do_proc2 == 1 && strcmp(type, "proc2") == 0) {
+            // the first number is the count of numbers present
+            // so we start for word 2
+
+            unsigned long long sum = 0;
+            unsigned int i, j;
+            for(i = 0, j = 2; j < words && nfs_proc2_values[i].name[0] ; i++, j++) {
+                nfs_proc2_values[i].value = strtoull(procfile_lineword(ff, l, j), NULL, 10);
+                nfs_proc2_values[i].present = 1;
+                sum += nfs_proc2_values[i].value;
+            }
+
+            if(sum == 0ULL) {
+                if(!proc2_warning) {
+                    error("Disabling /proc/net/rpc/nfs v2 procedure calls chart. It seems unused on this machine. It will be enabled automatically when found with data in it.");
+                    proc2_warning = 1;
+                }
+                do_proc2 = 0;
+            }
+            else do_proc2 = 2;
+        }
+        else if(do_proc3 == 1 && strcmp(type, "proc3") == 0) {
+            // the first number is the count of numbers present
+            // so we start for word 2
+
+            unsigned long long sum = 0;
+            unsigned int i, j;
+            for(i = 0, j = 2; j < words && nfs_proc3_values[i].name[0] ; i++, j++) {
+                nfs_proc3_values[i].value = strtoull(procfile_lineword(ff, l, j), NULL, 10);
+                nfs_proc3_values[i].present = 1;
+                sum += nfs_proc3_values[i].value;
+            }
+
+            if(sum == 0ULL) {
+                if(!proc3_warning) {
+                    info("Disabling /proc/net/rpc/nfs v3 procedure calls chart. It seems unused on this machine. It will be enabled automatically when found with data in it.");
+                    proc3_warning = 1;
+                }
+                do_proc3 = 0;
+            }
+            else do_proc3 = 2;
+        }
+        else if(do_proc4 == 1 && strcmp(type, "proc4") == 0) {
+            // the first number is the count of numbers present
+            // so we start for word 2
+
+            unsigned long long sum = 0;
+            unsigned int i, j;
+            for(i = 0, j = 2; j < words && nfs_proc4_values[i].name[0] ; i++, j++) {
+                nfs_proc4_values[i].value = strtoull(procfile_lineword(ff, l, j), NULL, 10);
+                nfs_proc4_values[i].present = 1;
+                sum += nfs_proc4_values[i].value;
+            }
+
+            if(sum == 0ULL) {
+                if(!proc4_warning) {
+                    info("Disabling /proc/net/rpc/nfs v4 procedure calls chart. It seems unused on this machine. It will be enabled automatically when found with data in it.");
+                    proc4_warning = 1;
+                }
+                do_proc4 = 0;
+            }
+            else do_proc4 = 2;
+        }
+    }
+
+    RRDSET *st;
+
+    // --------------------------------------------------------------------
+
+    if(do_net == 2) {
+        st = rrdset_find_bytype("nfs", "net");
+        if(!st) {
+            st = rrdset_create("nfs", "net", NULL, "network", NULL, "NFS Client Network", "operations/s", 5007, update_every, RRDSET_TYPE_STACKED);
+            st->isdetail = 1;
+
+            rrddim_add(st, "udp", NULL, 1, 1, RRDDIM_INCREMENTAL);
+            rrddim_add(st, "tcp", NULL, 1, 1, RRDDIM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        // ignore net_count, net_tcp_connections
+        if(net_count) {};
+        if(net_tcp_connections) {};
+
+        rrddim_set(st, "udp", net_udp_count);
+        rrddim_set(st, "tcp", net_tcp_count);
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if(do_rpc == 2) {
+        st = rrdset_find_bytype("nfs", "rpc");
+        if(!st) {
+            st = rrdset_create("nfs", "rpc", NULL, "rpc", NULL, "NFS Client Remote Procedure Calls Statistics", "calls/s", 5008, update_every, RRDSET_TYPE_LINE);
+            st->isdetail = 1;
+
+            rrddim_add(st, "calls", NULL, 1, 1, RRDDIM_INCREMENTAL);
+            rrddim_add(st, "retransmits", NULL, -1, 1, RRDDIM_INCREMENTAL);
+            rrddim_add(st, "auth_refresh", NULL, -1, 1, RRDDIM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        rrddim_set(st, "calls", rpc_calls);
+        rrddim_set(st, "retransmits", rpc_retransmits);
+        rrddim_set(st, "auth_refresh", rpc_auth_refresh);
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if(do_proc2 == 2) {
+        unsigned int i;
+        st = rrdset_find_bytype("nfs", "proc2");
+        if(!st) {
+            st = rrdset_create("nfs", "proc2", NULL, "nfsv2rpc", NULL, "NFS v2 Client Remote Procedure Calls", "calls/s", 5009, update_every, RRDSET_TYPE_STACKED);
+
+            for(i = 0; nfs_proc2_values[i].present ; i++)
+                rrddim_add(st, nfs_proc2_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        for(i = 0; nfs_proc2_values[i].present ; i++)
+            rrddim_set(st, nfs_proc2_values[i].name, nfs_proc2_values[i].value);
+
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if(do_proc3 == 2) {
+        unsigned int i;
+        st = rrdset_find_bytype("nfs", "proc3");
+        if(!st) {
+            st = rrdset_create("nfs", "proc3", NULL, "nfsv3rpc", NULL, "NFS v3 Client Remote Procedure Calls", "calls/s", 5010, update_every, RRDSET_TYPE_STACKED);
+
+            for(i = 0; nfs_proc3_values[i].present ; i++)
+                rrddim_add(st, nfs_proc3_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        for(i = 0; nfs_proc3_values[i].present ; i++)
+            rrddim_set(st, nfs_proc3_values[i].name, nfs_proc3_values[i].value);
+
+        rrdset_done(st);
+    }
+
+    // --------------------------------------------------------------------
+
+    if(do_proc4 == 2) {
+        unsigned int i;
+        st = rrdset_find_bytype("nfs", "proc4");
+        if(!st) {
+            st = rrdset_create("nfs", "proc4", NULL, "nfsv4rpc", NULL, "NFS v4 Client Remote Procedure Calls", "calls/s", 5011, update_every, RRDSET_TYPE_STACKED);
+
+            for(i = 0; nfs_proc4_values[i].present ; i++)
+                rrddim_add(st, nfs_proc4_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
+        }
+        else rrdset_next(st);
+
+        for(i = 0; nfs_proc4_values[i].present ; i++)
+            rrddim_set(st, nfs_proc4_values[i].name, nfs_proc4_values[i].value);
+
+        rrdset_done(st);
+    }
+
+    return 0;
+}
diff --git a/src/proc_net_rpc_nfsd.c b/src/proc_net_rpc_nfsd.c
index 0323b4dfb..817e6c86a 100644
--- a/src/proc_net_rpc_nfsd.c
+++ b/src/proc_net_rpc_nfsd.c
@@ -2,47 +2,135 @@
 
 struct nfsd_procs {
     char name[30];
-    unsigned long long proc2;
-    unsigned long long proc3;
-    unsigned long long proc4;
-    int present2;
-    int present3;
-    int present4;
+    unsigned long long value;
+    int present;
 };
 
-struct nfsd_procs nfsd_proc_values[] = {
-    { "null", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "getattr", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "setattr", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "lookup", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "access", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "readlink", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "read", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "write", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "create", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "mkdir", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "symlink", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "mknod", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "remove", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "rmdir", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "rename", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "link", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "readdir", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "readdirplus", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "fsstat", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "fsinfo", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "pathconf", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "commit", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
-    { "", 0ULL, 0ULL, 0ULL, 0, 0, 0 },
+struct nfsd_procs nfsd_proc2_values[] = {
+    { "null", 0ULL, 0 },
+    { "getattr", 0ULL, 0 },
+    { "setattr", 0ULL, 0 },
+    { "root", 0ULL, 0 },
+    { "lookup", 0ULL, 0 },
+    { "readlink", 0ULL, 0 },
+    { "read", 0ULL, 0 },
+    { "wrcache", 0ULL, 0 },
+    { "write", 0ULL, 0 },
+    { "create", 0ULL, 0 },
+    { "remove", 0ULL, 0 },
+    { "rename", 0ULL, 0 },
+    { "link", 0ULL, 0 },
+    { "symlink", 0ULL, 0 },
+    { "mkdir", 0ULL, 0 },
+    { "rmdir", 0ULL, 0 },
+    { "readdir", 0ULL, 0 },
+    { "fsstat", 0ULL, 0 },
+
+    /* termination */
+    { "", 0ULL, 0 }
 };
 
-struct nfsd4_ops {
-    char name[30];
-    unsigned long long value;
-    int present;
+struct nfsd_procs nfsd_proc3_values[] = {
+    { "null", 0ULL, 0 },
+    { "getattr", 0ULL, 0 },
+    { "setattr", 0ULL, 0 },
+    { "lookup", 0ULL, 0 },
+    { "access", 0ULL, 0 },
+    { "readlink", 0ULL, 0 },
+    { "read", 0ULL, 0 },
+    { "write", 0ULL, 0 },
+    { "create", 0ULL, 0 },
+    { "mkdir", 0ULL, 0 },
+    { "symlink", 0ULL, 0 },
+    { "mknod", 0ULL, 0 },
+    { "remove", 0ULL, 0 },
+    { "rmdir", 0ULL, 0 },
+    { "rename", 0ULL, 0 },
+    { "link", 0ULL, 0 },
+    { "readdir", 0ULL, 0 },
+    { "readdirplus", 0ULL, 0 },
+    { "fsstat", 0ULL, 0 },
+    { "fsinfo", 0ULL, 0 },
+    { "pathconf", 0ULL, 0 },
+    { "commit", 0ULL, 0 },
+
+    /* termination */
+    { "", 0ULL, 0 }
+};
+
+struct nfsd_procs nfsd_proc4_values[] = {
+    { "null", 0ULL, 0 },
+    { "read", 0ULL, 0 },
+    { "write", 0ULL, 0 },
+    { "commit", 0ULL, 0 },
+    { "open", 0ULL, 0 },
+    { "open_conf", 0ULL, 0 },
+    { "open_noat", 0ULL, 0 },
+    { "open_dgrd", 0ULL, 0 },
+    { "close", 0ULL, 0 },
+    { "setattr", 0ULL, 0 },
+    { "fsinfo", 0ULL, 0 },
+    { "renew", 0ULL, 0 },
+    { "setclntid", 0ULL, 0 },
+    { "confirm", 0ULL, 0 },
+    { "lock", 0ULL, 0 },
+    { "lockt", 0ULL, 0 },
+    { "locku", 0ULL, 0 },
+    { "access", 0ULL, 0 },
+    { "getattr", 0ULL, 0 },
+    { "lookup", 0ULL, 0 },
+    { "lookup_root", 0ULL, 0 },
+    { "remove", 0ULL, 0 },
+    { "rename", 0ULL, 0 },
+    { "link", 0ULL, 0 },
+    { "symlink", 0ULL, 0 },
+    { "create", 0ULL, 0 },
+    { "pathconf", 0ULL, 0 },
+    { "statfs", 0ULL, 0 },
+    { "readlink", 0ULL, 0 },
+    { "readdir", 0ULL, 0 },
+    { "server_caps", 0ULL, 0 },
+    { "delegreturn", 0ULL, 0 },
+    { "getacl", 0ULL, 0 },
+    { "setacl", 0ULL, 0 },
+    { "fs_locations", 0ULL, 0 },
+    { "rel_lkowner", 0ULL, 0 },
+    { "secinfo", 0ULL, 0 },
+    { "fsid_present", 0ULL, 0 },
+
+    /* nfsv4.1 client ops */
+    { "exchange_id", 0ULL, 0 },
+    { "create_session", 0ULL, 0 },
+    { "destroy_session", 0ULL, 0 },
+    { "sequence", 0ULL, 0 },
+    { "get_lease_time", 0ULL, 0 },
+    { "reclaim_comp", 0ULL, 0 },
+    { "layoutget", 0ULL, 0 },
+    { "getdevinfo", 0ULL, 0 },
+    { "layoutcommit", 0ULL, 0 },
+    { "layoutreturn", 0ULL, 0 },
+    { "secinfo_no", 0ULL, 0 },
+    { "test_stateid", 0ULL, 0 },
+    { "free_stateid", 0ULL, 0 },
+    { "getdevicelist", 0ULL, 0 },
+    { "bind_conn_to_ses", 0ULL, 0 },
+    { "destroy_clientid", 0ULL, 0 },
+
+    /* nfsv4.2 client ops */
+    { "seek", 0ULL, 0 },
+    { "allocate", 0ULL, 0 },
+    { "deallocate", 0ULL, 0 },
+    { "layoutstats", 0ULL, 0 },
+    { "clone", 0ULL, 0 },
+
+    /* termination */
+    { "", 0ULL, 0 }
 };
 
-struct nfsd4_ops nfsd4_ops_values[] = {
+struct nfsd_procs nfsd4_ops_values[] = {
+    { "unused_op0", 0ULL, 0},
+    { "unused_op1", 0ULL, 0},
+    { "future_op2", 0ULL, 0},
     { "access", 0ULL, 0},
     { "close", 0ULL, 0},
     { "commit", 0ULL, 0},
@@ -56,7 +144,7 @@ struct nfsd4_ops nfsd4_ops_values[] = {
     { "lockt", 0ULL, 0},
     { "locku", 0ULL, 0},
     { "lookup", 0ULL, 0},
-    { "lookupp", 0ULL, 0},
+    { "lookup_root", 0ULL, 0},
     { "nverify", 0ULL, 0},
     { "open", 0ULL, 0},
     { "openattr", 0ULL, 0},
@@ -107,7 +195,7 @@ struct nfsd4_ops nfsd4_ops_values[] = {
     { "copy", 0ULL, 0},
     { "copy_notify", 0ULL, 0},
     { "deallocate", 0ULL, 0},
-    { "io_advise", 0ULL, 0},
+    { "ioadvise", 0ULL, 0},
     { "layouterror", 0ULL, 0},
     { "layoutstats", 0ULL, 0},
     { "offload_cancel", 0ULL, 0},
@@ -174,13 +262,13 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     unsigned long long th_threads = 0, th_fullcnt = 0, th_hist10 = 0, th_hist20 = 0, th_hist30 = 0, th_hist40 = 0, th_hist50 = 0, th_hist60 = 0, th_hist70 = 0, th_hist80 = 0, th_hist90 = 0, th_hist100 = 0;
     unsigned long long ra_size = 0, ra_hist10 = 0, ra_hist20 = 0, ra_hist30 = 0, ra_hist40 = 0, ra_hist50 = 0, ra_hist60 = 0, ra_hist70 = 0, ra_hist80 = 0, ra_hist90 = 0, ra_hist100 = 0, ra_none = 0;
     unsigned long long net_count = 0, net_udp_count = 0, net_tcp_count = 0, net_tcp_connections = 0;
-    unsigned long long rpc_count = 0, rpc_bad_format = 0, rpc_bad_auth = 0, rpc_bad_client = 0;
+    unsigned long long rpc_calls = 0, rpc_bad_format = 0, rpc_bad_auth = 0, rpc_bad_client = 0;
 
     for(l = 0; l < lines ;l++) {
         words = procfile_linewords(ff, l);
         if(!words) continue;
 
-        type        = procfile_lineword(ff, l, 0);
+        type = procfile_lineword(ff, l, 0);
 
         if(do_rc == 1 && strcmp(type, "rc") == 0) {
             if(words < 4) {
@@ -306,12 +394,12 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
                 continue;
             }
 
-            rpc_count = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
+            rpc_calls = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
             rpc_bad_format = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
             rpc_bad_auth = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
             rpc_bad_client = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
 
-            unsigned long long sum = rpc_count + rpc_bad_format + rpc_bad_auth + rpc_bad_client;
+            unsigned long long sum = rpc_calls + rpc_bad_format + rpc_bad_auth + rpc_bad_client;
             if(sum == 0ULL) do_rpc = -1;
             else do_rpc = 2;
         }
@@ -321,10 +409,10 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
 
             unsigned long long sum = 0;
             unsigned int i, j;
-            for(i = 0, j = 2; j < words && nfsd_proc_values[i].name[0] ; i++, j++) {
-                nfsd_proc_values[i].proc2 = strtoull(procfile_lineword(ff, l, j), NULL, 10);
-                nfsd_proc_values[i].present2 = 1;
-                sum += nfsd_proc_values[i].proc2;
+            for(i = 0, j = 2; j < words && nfsd_proc2_values[i].name[0] ; i++, j++) {
+                nfsd_proc2_values[i].value = strtoull(procfile_lineword(ff, l, j), NULL, 10);
+                nfsd_proc2_values[i].present = 1;
+                sum += nfsd_proc2_values[i].value;
             }
 
             if(sum == 0ULL) {
@@ -342,10 +430,10 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
 
             unsigned long long sum = 0;
             unsigned int i, j;
-            for(i = 0, j = 2; j < words && nfsd_proc_values[i].name[0] ; i++, j++) {
-                nfsd_proc_values[i].proc3 = strtoull(procfile_lineword(ff, l, j), NULL, 10);
-                nfsd_proc_values[i].present3 = 1;
-                sum += nfsd_proc_values[i].proc3;
+            for(i = 0, j = 2; j < words && nfsd_proc3_values[i].name[0] ; i++, j++) {
+                nfsd_proc3_values[i].value = strtoull(procfile_lineword(ff, l, j), NULL, 10);
+                nfsd_proc3_values[i].present = 1;
+                sum += nfsd_proc3_values[i].value;
             }
 
             if(sum == 0ULL) {
@@ -363,10 +451,10 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
 
             unsigned long long sum = 0;
             unsigned int i, j;
-            for(i = 0, j = 2; j < words && nfsd_proc_values[i].name[0] ; i++, j++) {
-                nfsd_proc_values[i].proc4 = strtoull(procfile_lineword(ff, l, j), NULL, 10);
-                nfsd_proc_values[i].present4 = 1;
-                sum += nfsd_proc_values[i].proc4;
+            for(i = 0, j = 2; j < words && nfsd_proc4_values[i].name[0] ; i++, j++) {
+                nfsd_proc4_values[i].value = strtoull(procfile_lineword(ff, l, j), NULL, 10);
+                nfsd_proc4_values[i].present = 1;
+                sum += nfsd_proc4_values[i].value;
             }
 
             if(sum == 0ULL) {
@@ -408,7 +496,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     if(do_rc == 2) {
         st = rrdset_find_bytype("nfsd", "readcache");
         if(!st) {
-            st = rrdset_create("nfsd", "readcache", NULL, "nfsd", NULL, "Read Cache", "reads/s", 5000, update_every, RRDSET_TYPE_STACKED);
+            st = rrdset_create("nfsd", "readcache", NULL, "cache", NULL, "NFS Server Read Cache", "reads/s", 5000, update_every, RRDSET_TYPE_STACKED);
 
             rrddim_add(st, "hits", NULL, 1, 1, RRDDIM_INCREMENTAL);
             rrddim_add(st, "misses", NULL, 1, 1, RRDDIM_INCREMENTAL);
@@ -427,7 +515,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     if(do_fh == 2) {
         st = rrdset_find_bytype("nfsd", "filehandles");
         if(!st) {
-            st = rrdset_create("nfsd", "filehandles", NULL, "nfsd", NULL, "File Handles", "handles/s", 5001, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create("nfsd", "filehandles", NULL, "filehandles", NULL, "NFS Server File Handles", "handles/s", 5001, update_every, RRDSET_TYPE_LINE);
             st->isdetail = 1;
 
             rrddim_add(st, "stale", NULL, 1, 1, RRDDIM_ABSOLUTE);
@@ -451,7 +539,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     if(do_io == 2) {
         st = rrdset_find_bytype("nfsd", "io");
         if(!st) {
-            st = rrdset_create("nfsd", "io", NULL, "nfsd", NULL, "I/O", "kilobytes/s", 5002, update_every, RRDSET_TYPE_AREA);
+            st = rrdset_create("nfsd", "io", NULL, "io", NULL, "NFS Server I/O", "kilobytes/s", 5002, update_every, RRDSET_TYPE_AREA);
 
             rrddim_add(st, "read", NULL, 1, 1000, RRDDIM_INCREMENTAL);
             rrddim_add(st, "write", NULL, -1, 1000, RRDDIM_INCREMENTAL);
@@ -468,7 +556,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     if(do_th == 2) {
         st = rrdset_find_bytype("nfsd", "threads");
         if(!st) {
-            st = rrdset_create("nfsd", "threads", NULL, "nfsd", NULL, "Threads", "threads", 5003, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create("nfsd", "threads", NULL, "threads", NULL, "NFS Server Threads", "threads", 5003, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "threads", NULL, 1, 1, RRDDIM_ABSOLUTE);
         }
@@ -479,7 +567,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
 
         st = rrdset_find_bytype("nfsd", "threads_fullcnt");
         if(!st) {
-            st = rrdset_create("nfsd", "threads_fullcnt", NULL, "nfsd", NULL, "Threads Full Count", "ops/s", 5004, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create("nfsd", "threads_fullcnt", NULL, "threads", NULL, "NFS Server Threads Full Count", "ops/s", 5004, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "full_count", NULL, 1, 1, RRDDIM_INCREMENTAL);
         }
@@ -490,7 +578,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
 
         st = rrdset_find_bytype("nfsd", "threads_histogram");
         if(!st) {
-            st = rrdset_create("nfsd", "threads_histogram", NULL, "nfsd", NULL, "Threads Usage Histogram", "percentage", 5005, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create("nfsd", "threads_histogram", NULL, "threads", NULL, "NFS Server Threads Usage Histogram", "percentage", 5005, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "0%-10%", NULL, 1, 1000, RRDDIM_ABSOLUTE);
             rrddim_add(st, "10%-20%", NULL, 1, 1000, RRDDIM_ABSOLUTE);
@@ -523,7 +611,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     if(do_ra == 2) {
         st = rrdset_find_bytype("nfsd", "readahead");
         if(!st) {
-            st = rrdset_create("nfsd", "readahead", NULL, "nfsd", NULL, "Read Ahead Depth", "percentage", 5005, update_every, RRDSET_TYPE_STACKED);
+            st = rrdset_create("nfsd", "readahead", NULL, "readahead", NULL, "NFS Server Read Ahead Depth", "percentage", 5005, update_every, RRDSET_TYPE_STACKED);
 
             rrddim_add(st, "10%", NULL, 1, 1, RRDDIM_PCENT_OVER_DIFF_TOTAL);
             rrddim_add(st, "20%", NULL, 1, 1, RRDDIM_PCENT_OVER_DIFF_TOTAL);
@@ -561,7 +649,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     if(do_net == 2) {
         st = rrdset_find_bytype("nfsd", "net");
         if(!st) {
-            st = rrdset_create("nfsd", "net", NULL, "nfsd", NULL, "Network Reads", "reads/s", 5007, update_every, RRDSET_TYPE_STACKED);
+            st = rrdset_create("nfsd", "net", NULL, "network", NULL, "NFS Server Network Statistics", "packets/s", 5007, update_every, RRDSET_TYPE_STACKED);
             st->isdetail = 1;
 
             rrddim_add(st, "udp", NULL, 1, 1, RRDDIM_INCREMENTAL);
@@ -583,10 +671,10 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
     if(do_rpc == 2) {
         st = rrdset_find_bytype("nfsd", "rpc");
         if(!st) {
-            st = rrdset_create("nfsd", "rpc", NULL, "nfsd", NULL, "Remote Procedure Calls", "calls/s", 5008, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create("nfsd", "rpc", NULL, "rpc", NULL, "NFS Server Remote Procedure Calls Statistics", "calls/s", 5008, update_every, RRDSET_TYPE_LINE);
             st->isdetail = 1;
 
-            rrddim_add(st, "all", NULL, 1, 1, RRDDIM_INCREMENTAL);
+            rrddim_add(st, "calls", NULL, 1, 1, RRDDIM_INCREMENTAL);
             rrddim_add(st, "bad_format", NULL, -1, 1, RRDDIM_INCREMENTAL);
             rrddim_add(st, "bad_auth", NULL, -1, 1, RRDDIM_INCREMENTAL);
         }
@@ -595,7 +683,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
         // ignore rpc_bad_client
         if(rpc_bad_client) {};
 
-        rrddim_set(st, "all", rpc_count);
+        rrddim_set(st, "calls", rpc_calls);
         rrddim_set(st, "bad_format", rpc_bad_format);
         rrddim_set(st, "bad_auth", rpc_bad_auth);
         rrdset_done(st);
@@ -607,15 +695,15 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
         unsigned int i;
         st = rrdset_find_bytype("nfsd", "proc2");
         if(!st) {
-            st = rrdset_create("nfsd", "proc2", NULL, "nfsd", NULL, "NFS v2 Calls", "calls/s", 5009, update_every, RRDSET_TYPE_STACKED);
+            st = rrdset_create("nfsd", "proc2", NULL, "nfsv2rpc", NULL, "NFS v2 Server Remote Procedure Calls", "calls/s", 5009, update_every, RRDSET_TYPE_STACKED);
 
-            for(i = 0; nfsd_proc_values[i].present2 ; i++)
-                rrddim_add(st, nfsd_proc_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
+            for(i = 0; nfsd_proc2_values[i].present ; i++)
+                rrddim_add(st, nfsd_proc2_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
         }
         else rrdset_next(st);
 
-        for(i = 0; nfsd_proc_values[i].present2 ; i++)
-            rrddim_set(st, nfsd_proc_values[i].name, nfsd_proc_values[i].proc2);
+        for(i = 0; nfsd_proc2_values[i].present ; i++)
+            rrddim_set(st, nfsd_proc2_values[i].name, nfsd_proc2_values[i].value);
 
         rrdset_done(st);
     }
@@ -626,15 +714,15 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
         unsigned int i;
         st = rrdset_find_bytype("nfsd", "proc3");
         if(!st) {
-            st = rrdset_create("nfsd", "proc3", NULL, "nfsd", NULL, "NFS v3 Calls", "calls/s", 5010, update_every, RRDSET_TYPE_STACKED);
+            st = rrdset_create("nfsd", "proc3", NULL, "nfsv3rpc", NULL, "NFS v3 Server Remote Procedure Calls", "calls/s", 5010, update_every, RRDSET_TYPE_STACKED);
 
-            for(i = 0; nfsd_proc_values[i].present3 ; i++)
-                rrddim_add(st, nfsd_proc_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
+            for(i = 0; nfsd_proc3_values[i].present ; i++)
+                rrddim_add(st, nfsd_proc3_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
         }
         else rrdset_next(st);
 
-        for(i = 0; nfsd_proc_values[i].present3 ; i++)
-            rrddim_set(st, nfsd_proc_values[i].name, nfsd_proc_values[i].proc3);
+        for(i = 0; nfsd_proc3_values[i].present ; i++)
+            rrddim_set(st, nfsd_proc3_values[i].name, nfsd_proc3_values[i].value);
 
         rrdset_done(st);
     }
@@ -645,15 +733,15 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
         unsigned int i;
         st = rrdset_find_bytype("nfsd", "proc4");
         if(!st) {
-            st = rrdset_create("nfsd", "proc4", NULL, "nfsd", NULL, "NFS v4 Calls", "calls/s", 5011, update_every, RRDSET_TYPE_STACKED);
+            st = rrdset_create("nfsd", "proc4", NULL, "nfsv4rpc", NULL, "NFS v4 Server Remote Procedure Calls", "calls/s", 5011, update_every, RRDSET_TYPE_STACKED);
 
-            for(i = 0; nfsd_proc_values[i].present4 ; i++)
-                rrddim_add(st, nfsd_proc_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
+            for(i = 0; nfsd_proc4_values[i].present ; i++)
+                rrddim_add(st, nfsd_proc4_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
         }
         else rrdset_next(st);
 
-        for(i = 0; nfsd_proc_values[i].present4 ; i++)
-            rrddim_set(st, nfsd_proc_values[i].name, nfsd_proc_values[i].proc4);
+        for(i = 0; nfsd_proc4_values[i].present ; i++)
+            rrddim_set(st, nfsd_proc4_values[i].name, nfsd_proc4_values[i].value);
 
         rrdset_done(st);
     }
@@ -664,7 +752,7 @@ int do_proc_net_rpc_nfsd(int update_every, unsigned long long dt) {
         unsigned int i;
         st = rrdset_find_bytype("nfsd", "proc4ops");
         if(!st) {
-            st = rrdset_create("nfsd", "proc4ops", NULL, "nfsd", NULL, "NFS v4 Operations", "operations/s", 5012, update_every, RRDSET_TYPE_STACKED);
+            st = rrdset_create("nfsd", "proc4ops", NULL, "nfsv2ops", NULL, "NFS v4 Server Operations", "operations/s", 5012, update_every, RRDSET_TYPE_STACKED);
 
             for(i = 0; nfsd4_ops_values[i].present ; i++)
                 rrddim_add(st, nfsd4_ops_values[i].name, NULL, 1, 1, RRDDIM_INCREMENTAL);
diff --git a/src/proc_net_snmp.c b/src/proc_net_snmp.c
index a773f55f6..a75c0a96a 100644
--- a/src/proc_net_snmp.c
+++ b/src/proc_net_snmp.c
@@ -3,34 +3,368 @@
 #define RRD_TYPE_NET_SNMP           "ipv4"
 #define RRD_TYPE_NET_SNMP_LEN       strlen(RRD_TYPE_NET_SNMP)
 
+#define NETSTAT_PRESENT 0x00000001
+
+struct netstat_columns {
+    char *name;
+    uint32_t hash;
+    unsigned long long value;
+    int multiplier;     // not needed everywhere
+    char *label;        // not needed everywhere
+};
+
+static struct netstat_columns ip_data[] = {
+//    { "Forwarding", 0, 0, 1, NULL },
+//    { "DefaultTTL", 0, 0, 1, NULL },
+    { "InReceives", 0, 0, 1, NULL },
+    { "InHdrErrors", 0, 0, 1, NULL },
+    { "InAddrErrors", 0, 0, 1, NULL },
+    { "ForwDatagrams", 0, 0, 1, NULL },
+    { "InUnknownProtos", 0, 0, 1, NULL },
+    { "InDiscards", 0, 0, 1, NULL },
+    { "InDelivers", 0, 0, 1, NULL },
+    { "OutRequests", 0, 0, 1, NULL },
+    { "OutDiscards", 0, 0, 1, NULL },
+    { "OutNoRoutes", 0, 0, 1, NULL },
+//    { "ReasmTimeout", 0, 0, 1, NULL },
+    { "ReasmReqds", 0, 0, 1, NULL },
+    { "ReasmOKs", 0, 0, 1, NULL },
+    { "ReasmFails", 0, 0, 1, NULL },
+    { "FragOKs", 0, 0, 1, NULL },
+    { "FragFails", 0, 0, 1, NULL },
+    { "FragCreates", 0, 0, 1, NULL },
+    { NULL, 0, 0, 0, NULL }
+};
+
+static struct netstat_columns icmp_data[] = {
+    { "InMsgs", 0, 0, 1, NULL },
+    { "OutMsgs", 0, 0, -1, NULL },
+    { "InErrors", 0, 0, 1, NULL },
+    { "OutErrors", 0, 0, -1, NULL },
+    { "InCsumErrors", 0, 0, 1, NULL },
+
+    // all these are available in icmpmsg
+//    { "InDestUnreachs", 0, 0, 1, NULL },
+//    { "OutDestUnreachs", 0, 0, -1, NULL },
+//    { "InTimeExcds", 0, 0, 1, NULL },
+//    { "OutTimeExcds", 0, 0, -1, NULL },
+//    { "InParmProbs", 0, 0, 1, NULL },
+//    { "OutParmProbs", 0, 0, -1, NULL },
+//    { "InSrcQuenchs", 0, 0, 1, NULL },
+//    { "OutSrcQuenchs", 0, 0, -1, NULL },
+//    { "InRedirects", 0, 0, 1, NULL },
+//    { "OutRedirects", 0, 0, -1, NULL },
+//    { "InEchos", 0, 0, 1, NULL },
+//    { "OutEchos", 0, 0, -1, NULL },
+//    { "InEchoReps", 0, 0, 1, NULL },
+//    { "OutEchoReps", 0, 0, -1, NULL },
+//    { "InTimestamps", 0, 0, 1, NULL },
+//    { "OutTimestamps", 0, 0, -1, NULL },
+//    { "InTimestampReps", 0, 0, 1, NULL },
+//    { "OutTimestampReps", 0, 0, -1, NULL },
+//    { "InAddrMasks", 0, 0, 1, NULL },
+//    { "OutAddrMasks", 0, 0, -1, NULL },
+//    { "InAddrMaskReps", 0, 0, 1, NULL },
+//    { "OutAddrMaskReps", 0, 0, -1, NULL },
+
+    { NULL, 0, 0, 0, NULL }
+};
+
+static struct netstat_columns icmpmsg_data[] = {
+    { "InType0", 0, 0, 1, "InEchoReps" },
+    { "OutType0", 0, 0, -1, "OutEchoReps" },
+//    { "InType1", 0, 0, 1, NULL },                   // unassigned
+//    { "OutType1", 0, 0, -1, NULL },                 // unassigned
+//    { "InType2", 0, 0, 1, NULL },                   // unassigned
+//    { "OutType2", 0, 0, -1, NULL },                 // unassigned
+    { "InType3", 0, 0, 1, "InDestUnreachs" },
+    { "OutType3", 0, 0, -1, "OutDestUnreachs" },
+//    { "InType4", 0, 0, 1, "InSrcQuenchs" },         // deprecated
+//    { "OutType4", 0, 0, -1, "OutSrcQuenchs" },      // deprecated
+    { "InType5", 0, 0, 1, "InRedirects" },
+    { "OutType5", 0, 0, -1, "OutRedirects" },
+//    { "InType6", 0, 0, 1, "InAlterHostAddr" },      // deprecated
+//    { "OutType6", 0, 0, -1, "OutAlterHostAddr" },   // deprecated
+//    { "InType7", 0, 0, 1, NULL },                   // unassigned
+//    { "OutType7", 0, 0, -1, NULL },                 // unassigned
+    { "InType8", 0, 0, 1, "InEchos" },
+    { "OutType8", 0, 0, -1, "OutEchos" },
+    { "InType9", 0, 0, 1, "InRouterAdvert" },
+    { "OutType9", 0, 0, -1, "OutRouterAdvert" },
+    { "InType10", 0, 0, 1, "InRouterSelect" },
+    { "OutType10", 0, 0, -1, "OutRouterSelect" },
+    { "InType11", 0, 0, 1, "InTimeExcds" },
+    { "OutType11", 0, 0, -1, "OutTimeExcds" },
+    { "InType12", 0, 0, 1, "InParmProbs" },
+    { "OutType12", 0, 0, -1, "OutParmProbs" },
+    { "InType13", 0, 0, 1, "InTimestamps" },
+    { "OutType13", 0, 0, -1, "OutTimestamps" },
+    { "InType14", 0, 0, 1, "InTimestampReps" },
+    { "OutType14", 0, 0, -1, "OutTimestampReps" },
+//    { "InType15", 0, 0, 1, "InInfos" },             // deprecated
+//    { "OutType15", 0, 0, -1, "OutInfos" },          // deprecated
+//    { "InType16", 0, 0, 1, "InInfoReps" },          // deprecated
+//    { "OutType16", 0, 0, -1, "OutInfoReps" },       // deprecated
+//    { "InType17", 0, 0, 1, "InAddrMasks" },         // deprecated
+//    { "OutType17", 0, 0, -1, "OutAddrMasks" },      // deprecated
+//    { "InType18", 0, 0, 1, "InAddrMaskReps" },      // deprecated
+//    { "OutType18", 0, 0, -1, "OutAddrMaskReps" },   // deprecated
+//    { "InType30", 0, 0, 1, "InTraceroute" },        // deprecated
+//    { "OutType30", 0, 0, -1, "OutTraceroute" },     // deprecated
+    { NULL, 0, 0, 0, NULL }
+};
+
+static struct netstat_columns tcp_data[] = {
+//    { "RtoAlgorithm", 0, 0, 1, NULL },
+//    { "RtoMin", 0, 0, 1, NULL },
+//    { "RtoMax", 0, 0, 1, NULL },
+//    { "MaxConn", 0, 0, 1, NULL },
+    { "ActiveOpens", 0, 0, 1, NULL },
+    { "PassiveOpens", 0, 0, 1, NULL },
+    { "AttemptFails", 0, 0, 1, NULL },
+    { "EstabResets", 0, 0, 1, NULL },
+    { "CurrEstab", 0, 0, 1, NULL },
+    { "InSegs", 0, 0, 1, NULL },
+    { "OutSegs", 0, 0, 1, NULL },
+    { "RetransSegs", 0, 0, 1, NULL },
+    { "InErrs", 0, 0, 1, NULL },
+    { "OutRsts", 0, 0, 1, NULL },
+    { "InCsumErrors", 0, 0, 1, NULL },
+    { NULL, 0, 0, 0, NULL }
+};
+
+static struct netstat_columns udp_data[] = {
+    { "InDatagrams", 0, 0, 1, NULL },
+    { "NoPorts", 0, 0, 1, NULL },
+    { "InErrors", 0, 0, 1, NULL },
+    { "OutDatagrams", 0, 0, 1, NULL },
+    { "RcvbufErrors", 0, 0, 1, NULL },
+    { "SndbufErrors", 0, 0, 1, NULL },
+    { "InCsumErrors", 0, 0, 1, NULL },
+    { "IgnoredMulti", 0, 0, 1, NULL },
+    { NULL, 0, 0, 0, NULL }
+};
+
+static struct netstat_columns udplite_data[] = {
+    { "InDatagrams", 0, 0, 1, NULL },
+    { "NoPorts", 0, 0, 1, NULL },
+    { "InErrors", 0, 0, 1, NULL },
+    { "OutDatagrams", 0, 0, 1, NULL },
+    { "RcvbufErrors", 0, 0, 1, NULL },
+    { "SndbufErrors", 0, 0, 1, NULL },
+    { "InCsumErrors", 0, 0, 1, NULL },
+    { "IgnoredMulti", 0, 0, 1, NULL },
+    { NULL, 0, 0, 0, NULL }
+};
+
+static void hash_array(struct netstat_columns *nc) {
+    int i;
+
+    for(i = 0; nc[i].name ;i++)
+        nc[i].hash = simple_hash(nc[i].name);
+}
+
+static unsigned long long *netstat_columns_find(struct netstat_columns *nc, const char *name) {
+    uint32_t i, hash = simple_hash(name);
+
+    for(i = 0; nc[i].name ;i++)
+        if(unlikely(nc[i].hash == hash && !strcmp(nc[i].name, name)))
+            return &nc[i].value;
+
+    fatal("Cannot find key '%s' in /proc/net/snmp internal array.", name);
+}
+
+static void parse_line_pair(procfile *ff, struct netstat_columns *nc, uint32_t header_line, uint32_t values_line) {
+    uint32_t hwords = procfile_linewords(ff, header_line);
+    uint32_t vwords = procfile_linewords(ff, values_line);
+    uint32_t w, i;
+
+    if(unlikely(vwords > hwords)) {
+        error("File /proc/net/snmp on header line %u has %u words, but on value line %u has %u words.", header_line, hwords, values_line, vwords);
+        vwords = hwords;
+    }
+
+    for(w = 1; w < vwords ;w++) {
+        char *key = procfile_lineword(ff, header_line, w);
+        uint32_t hash = simple_hash(key);
+
+        for(i = 0 ; nc[i].name ;i++) {
+            if(unlikely(hash == nc[i].hash && !strcmp(key, nc[i].name))) {
+                nc[i].value = strtoull(procfile_lineword(ff, values_line, w), NULL, 10);
+                break;
+            }
+        }
+    }
+}
+
 int do_proc_net_snmp(int update_every, unsigned long long dt) {
+    (void)dt;
+
     static procfile *ff = NULL;
     static int do_ip_packets = -1, do_ip_fragsout = -1, do_ip_fragsin = -1, do_ip_errors = -1,
         do_tcp_sockets = -1, do_tcp_packets = -1, do_tcp_errors = -1, do_tcp_handshake = -1,
-        do_udp_packets = -1, do_udp_errors = -1;
-
-    if(do_ip_packets == -1)     do_ip_packets       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 packets", 1);
-    if(do_ip_fragsout == -1)    do_ip_fragsout      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 fragments sent", 1);
-    if(do_ip_fragsin == -1)     do_ip_fragsin       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 fragments assembly", 1);
-    if(do_ip_errors == -1)      do_ip_errors        = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 errors", 1);
-    if(do_tcp_sockets == -1)    do_tcp_sockets      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP connections", 1);
-    if(do_tcp_packets == -1)    do_tcp_packets      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP packets", 1);
-    if(do_tcp_errors == -1)     do_tcp_errors       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP errors", 1);
-    if(do_tcp_handshake == -1)  do_tcp_handshake    = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP handshake issues", 1);
-    if(do_udp_packets == -1)    do_udp_packets      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 UDP packets", 1);
-    if(do_udp_errors == -1)     do_udp_errors       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 UDP errors", 1);
-
-    if(dt) {};
-
-    if(!ff) {
+        do_udp_packets = -1, do_udp_errors = -1, do_icmp_packets = -1, do_icmpmsg = -1, do_udplite_packets = -1;
+    static uint32_t hash_ip = 0, hash_icmp = 0, hash_tcp = 0, hash_udp = 0, hash_icmpmsg = 0, hash_udplite = 0;
+
+    //static unsigned long long *ip_Forwarding = NULL;
+    //static unsigned long long *ip_DefaultTTL = NULL;
+    static unsigned long long *ip_InReceives = NULL;
+    static unsigned long long *ip_InHdrErrors = NULL;
+    static unsigned long long *ip_InAddrErrors = NULL;
+    static unsigned long long *ip_ForwDatagrams = NULL;
+    static unsigned long long *ip_InUnknownProtos = NULL;
+    static unsigned long long *ip_InDiscards = NULL;
+    static unsigned long long *ip_InDelivers = NULL;
+    static unsigned long long *ip_OutRequests = NULL;
+    static unsigned long long *ip_OutDiscards = NULL;
+    static unsigned long long *ip_OutNoRoutes = NULL;
+    //static unsigned long long *ip_ReasmTimeout = NULL;
+    static unsigned long long *ip_ReasmReqds = NULL;
+    static unsigned long long *ip_ReasmOKs = NULL;
+    static unsigned long long *ip_ReasmFails = NULL;
+    static unsigned long long *ip_FragOKs = NULL;
+    static unsigned long long *ip_FragFails = NULL;
+    static unsigned long long *ip_FragCreates = NULL;
+
+    static unsigned long long *icmp_InMsgs = NULL;
+    static unsigned long long *icmp_OutMsgs = NULL;
+    static unsigned long long *icmp_InErrors = NULL;
+    static unsigned long long *icmp_OutErrors = NULL;
+    static unsigned long long *icmp_InCsumErrors = NULL;
+
+    //static unsigned long long *tcp_RtoAlgorithm = NULL;
+    //static unsigned long long *tcp_RtoMin = NULL;
+    //static unsigned long long *tcp_RtoMax = NULL;
+    //static unsigned long long *tcp_MaxConn = NULL;
+    static unsigned long long *tcp_ActiveOpens = NULL;
+    static unsigned long long *tcp_PassiveOpens = NULL;
+    static unsigned long long *tcp_AttemptFails = NULL;
+    static unsigned long long *tcp_EstabResets = NULL;
+    static unsigned long long *tcp_CurrEstab = NULL;
+    static unsigned long long *tcp_InSegs = NULL;
+    static unsigned long long *tcp_OutSegs = NULL;
+    static unsigned long long *tcp_RetransSegs = NULL;
+    static unsigned long long *tcp_InErrs = NULL;
+    static unsigned long long *tcp_OutRsts = NULL;
+    static unsigned long long *tcp_InCsumErrors = NULL;
+
+    static unsigned long long *udp_InDatagrams = NULL;
+    static unsigned long long *udp_NoPorts = NULL;
+    static unsigned long long *udp_InErrors = NULL;
+    static unsigned long long *udp_OutDatagrams = NULL;
+    static unsigned long long *udp_RcvbufErrors = NULL;
+    static unsigned long long *udp_SndbufErrors = NULL;
+    static unsigned long long *udp_InCsumErrors = NULL;
+    static unsigned long long *udp_IgnoredMulti = NULL;
+
+    static unsigned long long *udplite_InDatagrams = NULL;
+    static unsigned long long *udplite_NoPorts = NULL;
+    static unsigned long long *udplite_InErrors = NULL;
+    static unsigned long long *udplite_OutDatagrams = NULL;
+    static unsigned long long *udplite_RcvbufErrors = NULL;
+    static unsigned long long *udplite_SndbufErrors = NULL;
+    static unsigned long long *udplite_InCsumErrors = NULL;
+    static unsigned long long *udplite_IgnoredMulti = NULL;
+
+    if(unlikely(do_ip_packets == -1)) {
+        do_ip_packets       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 packets", 1);
+        do_ip_fragsout      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 fragments sent", 1);
+        do_ip_fragsin       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 fragments assembly", 1);
+        do_ip_errors        = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 errors", 1);
+        do_tcp_sockets      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP connections", 1);
+        do_tcp_packets      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP packets", 1);
+        do_tcp_errors       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP errors", 1);
+        do_tcp_handshake    = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 TCP handshake issues", 1);
+        do_udp_packets      = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 UDP packets", 1);
+        do_udp_errors       = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 UDP errors", 1);
+        do_icmp_packets     = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 ICMP packets", 1);
+        do_icmpmsg          = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 ICMP messages", 1);
+        do_udplite_packets  = config_get_boolean("plugin:proc:/proc/net/snmp", "ipv4 UDPLite packets", 1);
+
+        hash_ip = simple_hash("Ip");
+        hash_tcp = simple_hash("Tcp");
+        hash_udp = simple_hash("Udp");
+        hash_icmp = simple_hash("Icmp");
+        hash_icmpmsg = simple_hash("IcmpMsg");
+        hash_udplite = simple_hash("UdpLite");
+
+        hash_array(ip_data);
+        hash_array(tcp_data);
+        hash_array(udp_data);
+        hash_array(icmp_data);
+        hash_array(icmpmsg_data);
+        hash_array(udplite_data);
+
+        //ip_Forwarding = netstat_columns_find(ip_data, "Forwarding");
+        //ip_DefaultTTL = netstat_columns_find(ip_data, "DefaultTTL");
+        ip_InReceives = netstat_columns_find(ip_data, "InReceives");
+        ip_InHdrErrors = netstat_columns_find(ip_data, "InHdrErrors");
+        ip_InAddrErrors = netstat_columns_find(ip_data, "InAddrErrors");
+        ip_ForwDatagrams = netstat_columns_find(ip_data, "ForwDatagrams");
+        ip_InUnknownProtos = netstat_columns_find(ip_data, "InUnknownProtos");
+        ip_InDiscards = netstat_columns_find(ip_data, "InDiscards");
+        ip_InDelivers = netstat_columns_find(ip_data, "InDelivers");
+        ip_OutRequests = netstat_columns_find(ip_data, "OutRequests");
+        ip_OutDiscards = netstat_columns_find(ip_data, "OutDiscards");
+        ip_OutNoRoutes = netstat_columns_find(ip_data, "OutNoRoutes");
+        //ip_ReasmTimeout = netstat_columns_find(ip_data, "ReasmTimeout");
+        ip_ReasmReqds = netstat_columns_find(ip_data, "ReasmReqds");
+        ip_ReasmOKs = netstat_columns_find(ip_data, "ReasmOKs");
+        ip_ReasmFails = netstat_columns_find(ip_data, "ReasmFails");
+        ip_FragOKs = netstat_columns_find(ip_data, "FragOKs");
+        ip_FragFails = netstat_columns_find(ip_data, "FragFails");
+        ip_FragCreates = netstat_columns_find(ip_data, "FragCreates");
+
+        icmp_InMsgs = netstat_columns_find(icmp_data, "InMsgs");
+        icmp_OutMsgs = netstat_columns_find(icmp_data, "OutMsgs");
+        icmp_InErrors = netstat_columns_find(icmp_data, "InErrors");
+        icmp_OutErrors = netstat_columns_find(icmp_data, "OutErrors");
+        icmp_InCsumErrors = netstat_columns_find(icmp_data, "InCsumErrors");
+
+        //tcp_RtoAlgorithm = netstat_columns_find(tcp_data, "RtoAlgorithm");
+        //tcp_RtoMin = netstat_columns_find(tcp_data, "RtoMin");
+        //tcp_RtoMax = netstat_columns_find(tcp_data, "RtoMax");
+        //tcp_MaxConn = netstat_columns_find(tcp_data, "MaxConn");
+        tcp_ActiveOpens = netstat_columns_find(tcp_data, "ActiveOpens");
+        tcp_PassiveOpens = netstat_columns_find(tcp_data, "PassiveOpens");
+        tcp_AttemptFails = netstat_columns_find(tcp_data, "AttemptFails");
+        tcp_EstabResets = netstat_columns_find(tcp_data, "EstabResets");
+        tcp_CurrEstab = netstat_columns_find(tcp_data, "CurrEstab");
+        tcp_InSegs = netstat_columns_find(tcp_data, "InSegs");
+        tcp_OutSegs = netstat_columns_find(tcp_data, "OutSegs");
+        tcp_RetransSegs = netstat_columns_find(tcp_data, "RetransSegs");
+        tcp_InErrs = netstat_columns_find(tcp_data, "InErrs");
+        tcp_OutRsts = netstat_columns_find(tcp_data, "OutRsts");
+        tcp_InCsumErrors = netstat_columns_find(tcp_data, "InCsumErrors");
+
+        udp_InDatagrams = netstat_columns_find(udp_data, "InDatagrams");
+        udp_NoPorts = netstat_columns_find(udp_data, "NoPorts");
+        udp_InErrors = netstat_columns_find(udp_data, "InErrors");
+        udp_OutDatagrams = netstat_columns_find(udp_data, "OutDatagrams");
+        udp_RcvbufErrors = netstat_columns_find(udp_data, "RcvbufErrors");
+        udp_SndbufErrors = netstat_columns_find(udp_data, "SndbufErrors");
+        udp_InCsumErrors = netstat_columns_find(udp_data, "InCsumErrors");
+        udp_IgnoredMulti = netstat_columns_find(udp_data, "IgnoredMulti");
+
+        udplite_InDatagrams = netstat_columns_find(udplite_data, "InDatagrams");
+        udplite_NoPorts = netstat_columns_find(udplite_data, "NoPorts");
+        udplite_InErrors = netstat_columns_find(udplite_data, "InErrors");
+        udplite_OutDatagrams = netstat_columns_find(udplite_data, "OutDatagrams");
+        udplite_RcvbufErrors = netstat_columns_find(udplite_data, "RcvbufErrors");
+        udplite_SndbufErrors = netstat_columns_find(udplite_data, "SndbufErrors");
+        udplite_InCsumErrors = netstat_columns_find(udplite_data, "InCsumErrors");
+        udplite_IgnoredMulti = netstat_columns_find(udplite_data, "IgnoredMulti");
+    }
+
+    if(unlikely(!ff)) {
         char filename[FILENAME_MAX + 1];
         snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/snmp");
         ff = procfile_open(config_get("plugin:proc:/proc/net/snmp", "filename to monitor", filename), " \t:", PROCFILE_FLAG_DEFAULT);
     }
-    if(!ff) return 1;
+    if(unlikely(!ff)) return 1;
 
     ff = procfile_readall(ff);
-    if(!ff) return 0; // we return 0, so that we will retry to open it next time
+    if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
 
     uint32_t lines = procfile_lines(ff), l;
     uint32_t words;
@@ -38,8 +372,11 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
     RRDSET *st;
 
     for(l = 0; l < lines ;l++) {
-        if(strcmp(procfile_lineword(ff, l, 0), "Ip") == 0) {
-            l++;
+        char *key = procfile_lineword(ff, l, 0);
+        uint32_t hash = simple_hash(key);
+
+        if(unlikely(hash == hash_ip && strcmp(key, "Ip") == 0)) {
+            uint32_t h = l++;
 
             if(strcmp(procfile_lineword(ff, l, 0), "Ip") != 0) {
                 error("Cannot read Ip line from /proc/net/snmp.");
@@ -47,42 +384,13 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
             }
 
             words = procfile_linewords(ff, l);
-            if(words < 20) {
-                error("Cannot read /proc/net/snmp Ip line. Expected 20 params, read %u.", words);
+            if(words < 3) {
+                error("Cannot read /proc/net/snmp Ip line. Expected 3+ params, read %u.", words);
                 continue;
             }
 
             // see also http://net-snmp.sourceforge.net/docs/mibs/ip.html
-            unsigned long long Forwarding, DefaultTTL, InReceives, InHdrErrors, InAddrErrors, ForwDatagrams, InUnknownProtos, InDiscards, InDelivers,
-                OutRequests, OutDiscards, OutNoRoutes, ReasmTimeout, ReasmReqds, ReasmOKs, ReasmFails, FragOKs, FragFails, FragCreates;
-
-            Forwarding      = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
-            DefaultTTL      = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
-            InReceives      = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
-            InHdrErrors     = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
-            InAddrErrors    = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
-            ForwDatagrams   = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
-            InUnknownProtos = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
-            InDiscards      = strtoull(procfile_lineword(ff, l, 8), NULL, 10);
-            InDelivers      = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
-            OutRequests     = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
-            OutDiscards     = strtoull(procfile_lineword(ff, l, 11), NULL, 10);
-            OutNoRoutes     = strtoull(procfile_lineword(ff, l, 12), NULL, 10);
-            ReasmTimeout    = strtoull(procfile_lineword(ff, l, 13), NULL, 10);
-            ReasmReqds      = strtoull(procfile_lineword(ff, l, 14), NULL, 10);
-            ReasmOKs        = strtoull(procfile_lineword(ff, l, 15), NULL, 10);
-            ReasmFails      = strtoull(procfile_lineword(ff, l, 16), NULL, 10);
-            FragOKs         = strtoull(procfile_lineword(ff, l, 17), NULL, 10);
-            FragFails       = strtoull(procfile_lineword(ff, l, 18), NULL, 10);
-            FragCreates     = strtoull(procfile_lineword(ff, l, 19), NULL, 10);
-
-            // these are not counters
-            if(Forwarding) {};      // is forwarding enabled?
-            if(DefaultTTL) {};      // the default ttl on packets
-            if(ReasmTimeout) {};    // Reassembly timeout
-
-            // this counter is not used
-            if(InDelivers) {};      // total number of packets delivered to IP user-protocols
+            parse_line_pair(ff, ip_data, h, l);
 
             // --------------------------------------------------------------------
 
@@ -91,15 +399,17 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                 if(!st) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "packets", NULL, "packets", NULL, "IPv4 Packets", "packets/s", 3000, update_every, RRDSET_TYPE_LINE);
 
-                    rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "forwarded", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InReceives",    "received",  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutRequests",   "sent",     -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "ForwDatagrams", "forwarded", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InDelivers",    "delivered", 1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "sent", OutRequests);
-                rrddim_set(st, "received", InReceives);
-                rrddim_set(st, "forwarded", ForwDatagrams);
+                rrddim_set(st, "OutRequests",   *ip_OutRequests);
+                rrddim_set(st, "InReceives",    *ip_InReceives);
+                rrddim_set(st, "ForwDatagrams", *ip_ForwDatagrams);
+                rrddim_set(st, "InDelivers",    *ip_InDelivers);
                 rrdset_done(st);
             }
 
@@ -111,15 +421,15 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "fragsout", NULL, "fragments", NULL, "IPv4 Fragments Sent", "packets/s", 3010, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "ok", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "failed", NULL, -1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "all", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "FragOKs",     "ok",      1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "FragFails",   "failed", -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "FragCreates", "created", 1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "ok", FragOKs);
-                rrddim_set(st, "failed", FragFails);
-                rrddim_set(st, "all", FragCreates);
+                rrddim_set(st, "FragOKs",     *ip_FragOKs);
+                rrddim_set(st, "FragFails",   *ip_FragFails);
+                rrddim_set(st, "FragCreates", *ip_FragCreates);
                 rrdset_done(st);
             }
 
@@ -131,15 +441,15 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "fragsin", NULL, "fragments", NULL, "IPv4 Fragments Reassembly", "packets/s", 3011, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "ok", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "failed", NULL, -1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "all", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "ReasmOKs",   "ok",      1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "ReasmFails", "failed", -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "ReasmReqds", "all",     1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "ok", ReasmOKs);
-                rrddim_set(st, "failed", ReasmFails);
-                rrddim_set(st, "all", ReasmReqds);
+                rrddim_set(st, "ReasmOKs",   *ip_ReasmOKs);
+                rrddim_set(st, "ReasmFails", *ip_ReasmFails);
+                rrddim_set(st, "ReasmReqds", *ip_ReasmReqds);
                 rrdset_done(st);
             }
 
@@ -151,28 +461,108 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "errors", NULL, "errors", NULL, "IPv4 Errors", "packets/s", 3002, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "InDiscards", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "OutDiscards", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InDiscards",      NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutDiscards",     NULL, -1, 1, RRDDIM_INCREMENTAL);
 
-                    rrddim_add(st, "InHdrErrors", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "InAddrErrors", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "InUnknownProtos", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InHdrErrors",     NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutNoRoutes",     NULL, -1, 1, RRDDIM_INCREMENTAL);
 
-                    rrddim_add(st, "OutNoRoutes", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InAddrErrors",    NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InUnknownProtos", NULL,  1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InDiscards", InDiscards);
-                rrddim_set(st, "OutDiscards", OutDiscards);
-                rrddim_set(st, "InHdrErrors", InHdrErrors);
-                rrddim_set(st, "InAddrErrors", InAddrErrors);
-                rrddim_set(st, "InUnknownProtos", InUnknownProtos);
-                rrddim_set(st, "OutNoRoutes", OutNoRoutes);
+                rrddim_set(st, "InDiscards",      *ip_InDiscards);
+                rrddim_set(st, "OutDiscards",     *ip_OutDiscards);
+                rrddim_set(st, "InHdrErrors",     *ip_InHdrErrors);
+                rrddim_set(st, "InAddrErrors",    *ip_InAddrErrors);
+                rrddim_set(st, "InUnknownProtos", *ip_InUnknownProtos);
+                rrddim_set(st, "OutNoRoutes",     *ip_OutNoRoutes);
                 rrdset_done(st);
             }
         }
-        else if(strcmp(procfile_lineword(ff, l, 0), "Tcp") == 0) {
-            l++;
+        else if(unlikely(hash == hash_icmp && strcmp(key, "Icmp") == 0)) {
+            uint32_t h = l++;
+
+            if(strcmp(procfile_lineword(ff, l, 0), "Icmp") != 0) {
+                error("Cannot read Icmp line from /proc/net/snmp.");
+                break;
+            }
+
+            words = procfile_linewords(ff, l);
+            if(words < 3) {
+                error("Cannot read /proc/net/snmp Icmp line. Expected 3+ params, read %u.", words);
+                continue;
+            }
+
+            parse_line_pair(ff, icmp_data, h, l);
+
+            // --------------------------------------------------------------------
+
+            if(do_icmp_packets) {
+                st = rrdset_find(RRD_TYPE_NET_SNMP ".icmp");
+                if(!st) {
+                    st = rrdset_create(RRD_TYPE_NET_SNMP, "icmp", NULL, "icmp", NULL, "IPv4 ICMP Packets", "packets/s", 2602, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "InMsgs",  "received",  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutMsgs", "sent",     -1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "InMsgs",  *icmp_InMsgs);
+                rrddim_set(st, "OutMsgs", *icmp_OutMsgs);
+
+                rrdset_done(st);
+
+                st = rrdset_find(RRD_TYPE_NET_SNMP ".icmp_errors");
+                if(!st) {
+                    st = rrdset_create(RRD_TYPE_NET_SNMP, "icmp_errors", NULL, "icmp", NULL, "IPv4 ICMP Errors", "packets/s", 2603, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "InErrors",     NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutErrors",    NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InCsumErrors", NULL,  1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "InErrors",     *icmp_InErrors);
+                rrddim_set(st, "OutErrors",    *icmp_OutErrors);
+                rrddim_set(st, "InCsumErrors", *icmp_InCsumErrors);
+
+                rrdset_done(st);
+            }
+        }
+        else if(unlikely(hash == hash_icmpmsg && strcmp(key, "IcmpMsg") == 0)) {
+            uint32_t h = l++;
+
+            if(strcmp(procfile_lineword(ff, l, 0), "IcmpMsg") != 0) {
+                error("Cannot read IcmpMsg line from /proc/net/snmp.");
+                break;
+            }
+
+            parse_line_pair(ff, icmpmsg_data, h, l);
+
+            // --------------------------------------------------------------------
+
+            if(do_icmpmsg) {
+                int i;
+
+                st = rrdset_find(RRD_TYPE_NET_SNMP ".icmpmsg");
+                if(!st) {
+                    st = rrdset_create(RRD_TYPE_NET_SNMP, "icmpmsg", NULL, "icmp", NULL, "IPv4 ICMP Messsages", "packets/s", 2604, update_every, RRDSET_TYPE_LINE);
+
+                    for(i = 0; icmpmsg_data[i].name ;i++)
+                        rrddim_add(st, icmpmsg_data[i].name, icmpmsg_data[i].label,  icmpmsg_data[i].multiplier, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                for(i = 0; icmpmsg_data[i].name ;i++)
+                    rrddim_set(st, icmpmsg_data[i].name, icmpmsg_data[i].value);
+
+                rrdset_done(st);
+            }
+        }
+        else if(unlikely(hash == hash_tcp && strcmp(key, "Tcp") == 0)) {
+            uint32_t h = l++;
 
             if(strcmp(procfile_lineword(ff, l, 0), "Tcp") != 0) {
                 error("Cannot read Tcp line from /proc/net/snmp.");
@@ -180,34 +570,12 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
             }
 
             words = procfile_linewords(ff, l);
-            if(words < 15) {
-                error("Cannot read /proc/net/snmp Tcp line. Expected 15 params, read %u.", words);
+            if(words < 3) {
+                error("Cannot read /proc/net/snmp Tcp line. Expected 3+ params, read %u.", words);
                 continue;
             }
 
-            unsigned long long RtoAlgorithm, RtoMin, RtoMax, MaxConn, ActiveOpens, PassiveOpens, AttemptFails, EstabResets,
-                CurrEstab, InSegs, OutSegs, RetransSegs, InErrs, OutRsts;
-
-            RtoAlgorithm    = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
-            RtoMin          = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
-            RtoMax          = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
-            MaxConn         = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
-            ActiveOpens     = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
-            PassiveOpens    = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
-            AttemptFails    = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
-            EstabResets     = strtoull(procfile_lineword(ff, l, 8), NULL, 10);
-            CurrEstab       = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
-            InSegs          = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
-            OutSegs         = strtoull(procfile_lineword(ff, l, 11), NULL, 10);
-            RetransSegs     = strtoull(procfile_lineword(ff, l, 12), NULL, 10);
-            InErrs          = strtoull(procfile_lineword(ff, l, 13), NULL, 10);
-            OutRsts         = strtoull(procfile_lineword(ff, l, 14), NULL, 10);
-
-            // these are not counters
-            if(RtoAlgorithm) {};
-            if(RtoMin) {};
-            if(RtoMax) {};
-            if(MaxConn) {};
+            parse_line_pair(ff, tcp_data, h, l);
 
             // --------------------------------------------------------------------
 
@@ -217,11 +585,11 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                 if(!st) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "tcpsock", NULL, "tcp", NULL, "IPv4 TCP Connections", "active connections", 2500, update_every, RRDSET_TYPE_LINE);
 
-                    rrddim_add(st, "connections", NULL, 1, 1, RRDDIM_ABSOLUTE);
+                    rrddim_add(st, "CurrEstab", "connections", 1, 1, RRDDIM_ABSOLUTE);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "connections", CurrEstab);
+                rrddim_set(st, "CurrEstab", *tcp_CurrEstab);
                 rrdset_done(st);
             }
 
@@ -232,13 +600,13 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                 if(!st) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "tcppackets", NULL, "tcp", NULL, "IPv4 TCP Packets", "packets/s", 2600, update_every, RRDSET_TYPE_LINE);
 
-                    rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InSegs",  "received", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutSegs", "sent",    -1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "received", InSegs);
-                rrddim_set(st, "sent", OutSegs);
+                rrddim_set(st, "InSegs",  *tcp_InSegs);
+                rrddim_set(st, "OutSegs", *tcp_OutSegs);
                 rrdset_done(st);
             }
 
@@ -250,13 +618,15 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "tcperrors", NULL, "tcp", NULL, "IPv4 TCP Errors", "packets/s", 2700, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "InErrs", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "RetransSegs", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InErrs",       NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InCsumErrors", NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "RetransSegs",  NULL, -1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InErrs", InErrs);
-                rrddim_set(st, "RetransSegs", RetransSegs);
+                rrddim_set(st, "InErrs",       *tcp_InErrs);
+                rrddim_set(st, "InCsumErrors", *tcp_InCsumErrors);
+                rrddim_set(st, "RetransSegs",  *tcp_RetransSegs);
                 rrdset_done(st);
             }
 
@@ -268,24 +638,24 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "tcphandshake", NULL, "tcp", NULL, "IPv4 TCP Handshake Issues", "events/s", 2900, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "EstabResets", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "OutRsts", NULL, -1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "ActiveOpens", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "PassiveOpens", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "AttemptFails", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "EstabResets",  NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutRsts",      NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "ActiveOpens",  NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "PassiveOpens", NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "AttemptFails", NULL,  1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "EstabResets", EstabResets);
-                rrddim_set(st, "OutRsts", OutRsts);
-                rrddim_set(st, "ActiveOpens", ActiveOpens);
-                rrddim_set(st, "PassiveOpens", PassiveOpens);
-                rrddim_set(st, "AttemptFails", AttemptFails);
+                rrddim_set(st, "EstabResets",  *tcp_EstabResets);
+                rrddim_set(st, "OutRsts",      *tcp_OutRsts);
+                rrddim_set(st, "ActiveOpens",  *tcp_ActiveOpens);
+                rrddim_set(st, "PassiveOpens", *tcp_PassiveOpens);
+                rrddim_set(st, "AttemptFails", *tcp_AttemptFails);
                 rrdset_done(st);
             }
         }
-        else if(strcmp(procfile_lineword(ff, l, 0), "Udp") == 0) {
-            l++;
+        else if(unlikely(hash == hash_udp && strcmp(key, "Udp") == 0)) {
+            uint32_t h = l++;
 
             if(strcmp(procfile_lineword(ff, l, 0), "Udp") != 0) {
                 error("Cannot read Udp line from /proc/net/snmp.");
@@ -293,19 +663,12 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
             }
 
             words = procfile_linewords(ff, l);
-            if(words < 7) {
-                error("Cannot read /proc/net/snmp Udp line. Expected 7 params, read %u.", words);
+            if(words < 3) {
+                error("Cannot read /proc/net/snmp Udp line. Expected 3+ params, read %u.", words);
                 continue;
             }
 
-            unsigned long long InDatagrams, NoPorts, InErrors, OutDatagrams, RcvbufErrors, SndbufErrors;
-
-            InDatagrams     = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
-            NoPorts         = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
-            InErrors        = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
-            OutDatagrams    = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
-            RcvbufErrors    = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
-            SndbufErrors    = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
+            parse_line_pair(ff, udp_data, h, l);
 
             // --------------------------------------------------------------------
 
@@ -315,13 +678,13 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                 if(!st) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "udppackets", NULL, "udp", NULL, "IPv4 UDP Packets", "packets/s", 2601, update_every, RRDSET_TYPE_LINE);
 
-                    rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InDatagrams",  "received", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutDatagrams", "sent",    -1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "received", InDatagrams);
-                rrddim_set(st, "sent", OutDatagrams);
+                rrddim_set(st, "InDatagrams",  *udp_InDatagrams);
+                rrddim_set(st, "OutDatagrams", *udp_OutDatagrams);
                 rrdset_done(st);
             }
 
@@ -333,17 +696,75 @@ int do_proc_net_snmp(int update_every, unsigned long long dt) {
                     st = rrdset_create(RRD_TYPE_NET_SNMP, "udperrors", NULL, "udp", NULL, "IPv4 UDP Errors", "events/s", 2701, update_every, RRDSET_TYPE_LINE);
                     st->isdetail = 1;
 
-                    rrddim_add(st, "RcvbufErrors", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "RcvbufErrors", NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "SndbufErrors", NULL, -1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InErrors",     NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "NoPorts",      NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InCsumErrors", NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "IgnoredMulti", NULL,  1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "InErrors",     *udp_InErrors);
+                rrddim_set(st, "NoPorts",      *udp_NoPorts);
+                rrddim_set(st, "RcvbufErrors", *udp_RcvbufErrors);
+                rrddim_set(st, "SndbufErrors", *udp_SndbufErrors);
+                rrddim_set(st, "InCsumErrors", *udp_InCsumErrors);
+                rrddim_set(st, "IgnoredMulti", *udp_IgnoredMulti);
+                rrdset_done(st);
+            }
+        }
+        else if(unlikely(hash == hash_udplite && strcmp(key, "UdpLite") == 0)) {
+            uint32_t h = l++;
+
+            if(strcmp(procfile_lineword(ff, l, 0), "UdpLite") != 0) {
+                error("Cannot read UdpLite line from /proc/net/snmp.");
+                break;
+            }
+
+            words = procfile_linewords(ff, l);
+            if(words < 3) {
+                error("Cannot read /proc/net/snmp UdpLite line. Expected 3+ params, read %u.", words);
+                continue;
+            }
+
+            parse_line_pair(ff, udplite_data, h, l);
+
+            // --------------------------------------------------------------------
+
+            if(do_udplite_packets) {
+                st = rrdset_find(RRD_TYPE_NET_SNMP ".udplite");
+                if(!st) {
+                    st = rrdset_create(RRD_TYPE_NET_SNMP, "udplite", NULL, "udplite", NULL, "IPv4 UDPLite Packets", "packets/s", 2603, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "InDatagrams",  "received", 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "OutDatagrams", "sent",    -1, 1, RRDDIM_INCREMENTAL);
+                }
+                else rrdset_next(st);
+
+                rrddim_set(st, "InDatagrams",  *udplite_InDatagrams);
+                rrddim_set(st, "OutDatagrams", *udplite_OutDatagrams);
+                rrdset_done(st);
+
+                st = rrdset_find(RRD_TYPE_NET_SNMP ".udplite_errors");
+                if(!st) {
+                    st = rrdset_create(RRD_TYPE_NET_SNMP, "udplite_errors", NULL, "udplite", NULL, "IPv4 UDPLite Errors", "packets/s", 2604, update_every, RRDSET_TYPE_LINE);
+
+                    rrddim_add(st, "RcvbufErrors", NULL,  1, 1, RRDDIM_INCREMENTAL);
                     rrddim_add(st, "SndbufErrors", NULL, -1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "InErrors", NULL, 1, 1, RRDDIM_INCREMENTAL);
-                    rrddim_add(st, "NoPorts", NULL, 1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "NoPorts",      NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "IgnoredMulti", NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InErrors",     NULL,  1, 1, RRDDIM_INCREMENTAL);
+                    rrddim_add(st, "InCsumErrors", NULL,  1, 1, RRDDIM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
-                rrddim_set(st, "InErrors", InErrors);
-                rrddim_set(st, "NoPorts", NoPorts);
-                rrddim_set(st, "RcvbufErrors", RcvbufErrors);
-                rrddim_set(st, "SndbufErrors", SndbufErrors);
+                rrddim_set(st, "NoPorts",      *udplite_NoPorts);
+                rrddim_set(st, "InErrors",     *udplite_InErrors);
+                rrddim_set(st, "InCsumErrors", *udplite_InCsumErrors);
+                rrddim_set(st, "RcvbufErrors", *udplite_RcvbufErrors);
+                rrddim_set(st, "SndbufErrors", *udplite_SndbufErrors);
+                rrddim_set(st, "IgnoredMulti", *udplite_IgnoredMulti);
                 rrdset_done(st);
             }
         }
diff --git a/src/proc_net_softnet_stat.c b/src/proc_net_softnet_stat.c
new file mode 100644
index 000000000..b01315863
--- /dev/null
+++ b/src/proc_net_softnet_stat.c
@@ -0,0 +1,119 @@
+#include "common.h"
+
+static inline char *softnet_column_name(uint32_t column) {
+    switch(column) {
+        // https://github.com/torvalds/linux/blob/a7fd20d1c476af4563e66865213474a2f9f473a4/net/core/net-procfs.c#L161-L166
+        case 0: return "processed";
+        case 1: return "dropped";
+        case 2: return "squeezed";
+        case 9: return "received_rps";
+        case 10: return "flow_limit_count";
+        default: return NULL;
+    }
+}
+
+int do_proc_net_softnet_stat(int update_every, unsigned long long dt) {
+    (void)dt;
+
+    static procfile *ff = NULL;
+    static int do_per_core = -1;
+    static uint32_t allocated_lines = 0, allocated_columns = 0, *data = NULL;
+
+    if(do_per_core == -1) do_per_core = config_get_boolean("plugin:proc:/proc/net/softnet_stat", "softnet_stat per core", 1);
+
+    if(!ff) {
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/softnet_stat");
+        ff = procfile_open(config_get("plugin:proc:/proc/net/softnet_stat", "filename to monitor", filename), " \t", PROCFILE_FLAG_DEFAULT);
+    }
+    if(!ff) return 1;
+
+    ff = procfile_readall(ff);
+    if(!ff) return 0; // we return 0, so that we will retry to open it next time
+
+    uint32_t lines = procfile_lines(ff), l;
+    uint32_t words = procfile_linewords(ff, 0), w;
+
+    if(!lines || !words) {
+        error("Cannot read /proc/net/softnet_stat, %u lines and %u columns reported.", lines, words);
+        return 1;
+    }
+
+    if(lines > 200) lines = 200;
+    if(words > 50) words = 50;
+
+    if(unlikely(!data || lines > allocated_lines || words > allocated_columns)) {
+        freez(data);
+        allocated_lines = lines;
+        allocated_columns = words;
+        data = mallocz((allocated_lines + 1) * allocated_columns * sizeof(uint32_t));
+    }
+
+    // initialize to zero
+    memset(data, 0, (allocated_lines + 1) * allocated_columns * sizeof(uint32_t));
+
+    // parse the values
+    for(l = 0; l < lines ;l++) {
+        words = procfile_linewords(ff, l);
+        if(!words) continue;
+
+        if(words > allocated_columns) words = allocated_columns;
+
+        for(w = 0; w < words ; w++) {
+            if(unlikely(softnet_column_name(w))) {
+                uint32_t t = strtoul(procfile_lineword(ff, l, w), NULL, 16);
+                data[w] += t;
+                data[((l + 1) * allocated_columns) + w] = t;
+            }
+        }
+    }
+
+    if(data[(lines * allocated_columns)] == 0)
+        lines--;
+
+    RRDSET *st;
+
+    // --------------------------------------------------------------------
+
+    st = rrdset_find_bytype("system", "softnet_stat");
+    if(!st) {
+        st = rrdset_create("system", "softnet_stat", NULL, "softnet_stat", NULL, "System softnet_stat", "events/s", 955, update_every, RRDSET_TYPE_LINE);
+        for(w = 0; w < allocated_columns ;w++)
+            if(unlikely(softnet_column_name(w)))
+                rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL);
+    }
+    else rrdset_next(st);
+
+    for(w = 0; w < allocated_columns ;w++)
+        if(unlikely(softnet_column_name(w)))
+            rrddim_set(st, softnet_column_name(w), data[w]);
+
+    rrdset_done(st);
+
+    if(do_per_core) {
+        for(l = 0; l < lines ;l++) {
+            char id[50+1];
+            snprintfz(id, 50, "cpu%u_softnet_stat", l);
+
+            st = rrdset_find_bytype("cpu", id);
+            if(!st) {
+                char title[100+1];
+                snprintfz(title, 100, "CPU%u softnet_stat", l);
+
+                st = rrdset_create("cpu", id, NULL, "softnet_stat", NULL, title, "events/s", 4101 + l, update_every, RRDSET_TYPE_LINE);
+                for(w = 0; w < allocated_columns ;w++)
+                    if(unlikely(softnet_column_name(w)))
+                        rrddim_add(st, softnet_column_name(w), NULL, 1, 1, RRDDIM_INCREMENTAL);
+            }
+            else rrdset_next(st);
+
+            for(w = 0; w < allocated_columns ;w++)
+                if(unlikely(softnet_column_name(w)))
+                    rrddim_set(st, softnet_column_name(w), data[((l + 1) * allocated_columns) + w]);
+
+            rrdset_done(st);
+        }
+    }
+
+    return 0;
+}
diff --git a/src/proc_net_stat_conntrack.c b/src/proc_net_stat_conntrack.c
index 8234b20d2..54e250bf2 100644
--- a/src/proc_net_stat_conntrack.c
+++ b/src/proc_net_stat_conntrack.c
@@ -88,7 +88,7 @@ int do_proc_net_stat_conntrack(int update_every, unsigned long long dt) {
     if(do_sockets) {
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_CONNTRACK "_sockets");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_sockets", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Connections", "active connections", 1000, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_sockets", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Connections", "active connections", 3000, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "connections", NULL, 1, 1, RRDDIM_ABSOLUTE);
         }
@@ -103,7 +103,7 @@ int do_proc_net_stat_conntrack(int update_every, unsigned long long dt) {
     if(do_new) {
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_CONNTRACK "_new");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_new", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker New Connections", "connections/s", 1001, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_new", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker New Connections", "connections/s", 3001, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "new", NULL, 1, 1, RRDDIM_INCREMENTAL);
             rrddim_add(st, "ignore", NULL, -1, 1, RRDDIM_INCREMENTAL);
@@ -122,7 +122,7 @@ int do_proc_net_stat_conntrack(int update_every, unsigned long long dt) {
     if(do_changes) {
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_CONNTRACK "_changes");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_changes", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Changes", "changes/s", 1002, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_changes", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Changes", "changes/s", 3002, update_every, RRDSET_TYPE_LINE);
             st->isdetail = 1;
 
             rrddim_add(st, "inserted", NULL, 1, 1, RRDDIM_INCREMENTAL);
@@ -142,7 +142,7 @@ int do_proc_net_stat_conntrack(int update_every, unsigned long long dt) {
     if(do_expect) {
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_CONNTRACK "_expect");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_expect", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Expectations", "expectations/s", 1003, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_expect", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Expectations", "expectations/s", 3003, update_every, RRDSET_TYPE_LINE);
             st->isdetail = 1;
 
             rrddim_add(st, "created", NULL, 1, 1, RRDDIM_INCREMENTAL);
@@ -162,7 +162,7 @@ int do_proc_net_stat_conntrack(int update_every, unsigned long long dt) {
     if(do_search) {
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_CONNTRACK "_search");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_search", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Searches", "searches/s", 1010, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_search", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Searches", "searches/s", 3010, update_every, RRDSET_TYPE_LINE);
             st->isdetail = 1;
 
             rrddim_add(st, "searched", NULL, 1, 1, RRDDIM_INCREMENTAL);
@@ -182,7 +182,7 @@ int do_proc_net_stat_conntrack(int update_every, unsigned long long dt) {
     if(do_errors) {
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_CONNTRACK "_errors");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_errors", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Errors", "events/s", 1005, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_CONNTRACK "_errors", NULL, RRD_TYPE_NET_STAT_CONNTRACK, NULL, "Connection Tracker Errors", "events/s", 3005, update_every, RRDSET_TYPE_LINE);
             st->isdetail = 1;
 
             rrddim_add(st, "icmp_error", NULL, 1, 1, RRDDIM_INCREMENTAL);
diff --git a/src/proc_net_stat_synproxy.c b/src/proc_net_stat_synproxy.c
index 758c35dee..102805f70 100644
--- a/src/proc_net_stat_synproxy.c
+++ b/src/proc_net_stat_synproxy.c
@@ -58,7 +58,7 @@ int do_proc_net_stat_synproxy(int update_every, unsigned long long dt) {
 
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_entries");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_entries", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Entries Used", "entries", 1004, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_entries", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Entries Used", "entries", 3304, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "entries", NULL, 1, 1, RRDDIM_ABSOLUTE);
         }
@@ -75,7 +75,7 @@ int do_proc_net_stat_synproxy(int update_every, unsigned long long dt) {
 
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_syn_received");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_syn_received", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY SYN Packets received", "SYN/s", 1001, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_syn_received", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY SYN Packets received", "SYN/s", 3301, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
         }
@@ -92,7 +92,7 @@ int do_proc_net_stat_synproxy(int update_every, unsigned long long dt) {
 
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Connections Reopened", "connections/s", 1003, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_conn_reopened", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY Connections Reopened", "connections/s", 3303, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "reopened", NULL, 1, 1, RRDDIM_INCREMENTAL);
         }
@@ -109,7 +109,7 @@ int do_proc_net_stat_synproxy(int update_every, unsigned long long dt) {
 
         st = rrdset_find(RRD_TYPE_NET_STAT_NETFILTER "." RRD_TYPE_NET_STAT_SYNPROXY "_cookies");
         if(!st) {
-            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_cookies", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY TCP Cookies", "cookies/s", 1002, update_every, RRDSET_TYPE_LINE);
+            st = rrdset_create(RRD_TYPE_NET_STAT_NETFILTER, RRD_TYPE_NET_STAT_SYNPROXY "_cookies", NULL, RRD_TYPE_NET_STAT_SYNPROXY, NULL, "SYNPROXY TCP Cookies", "cookies/s", 3302, update_every, RRDSET_TYPE_LINE);
 
             rrddim_add(st, "valid", NULL, 1, 1, RRDDIM_INCREMENTAL);
             rrddim_add(st, "invalid", NULL, -1, 1, RRDDIM_INCREMENTAL);
diff --git a/src/proc_softirqs.c b/src/proc_softirqs.c
index a5165040a..ebbbf2aeb 100644
--- a/src/proc_softirqs.c
+++ b/src/proc_softirqs.c
@@ -21,8 +21,7 @@ static inline struct interrupt *get_interrupts_array(int lines, int cpus) {
     static struct interrupt *irrs = NULL;
     static int allocated = 0;
 
-    if(lines < allocated) return irrs;
-    else {
+    if(lines > allocated) {
         irrs = (struct interrupt *)reallocz(irrs, lines * recordsize(cpus));
         allocated = lines;
     }
@@ -134,8 +133,8 @@ int do_proc_softirqs(int update_every, unsigned long long dt) {
         int c;
 
         for(c = 0; c < cpus ; c++) {
-            char id[256+1];
-            snprintfz(id, 256, "cpu%d_softirqs", c);
+            char id[50+1];
+            snprintfz(id, 50, "cpu%d_softirqs", c);
 
             st = rrdset_find_bytype("cpu", id);
             if(!st) {
@@ -148,10 +147,9 @@ int do_proc_softirqs(int update_every, unsigned long long dt) {
                 }
                 if(core_sum == 0) continue; // try next core
 
-                char name[256+1], title[256+1];
-                snprintfz(name, 256, "cpu%d_softirqs", c);
-                snprintfz(title, 256, "CPU%d softirqs", c);
-                st = rrdset_create("cpu", id, name, "softirqs", "cpu.softirqs", title, "softirqs/s", 3000 + c, update_every, RRDSET_TYPE_STACKED);
+                char title[100+1];
+                snprintfz(title, 100, "CPU%d softirqs", c);
+                st = rrdset_create("cpu", id, NULL, "softirqs", "cpu.softirqs", title, "softirqs/s", 3000 + c, update_every, RRDSET_TYPE_STACKED);
 
                 for(l = 0; l < lines ;l++) {
                     struct interrupt *irr = irrindex(irrs, l, cpus);
diff --git a/src/proc_vmstat.c b/src/proc_vmstat.c
index f25d50c50..5f4e5aadd 100644
--- a/src/proc_vmstat.c
+++ b/src/proc_vmstat.c
@@ -193,11 +193,11 @@ int do_proc_vmstat(int update_every, unsigned long long dt) {
         // hash_unevictable_pgs_stranded = simple_hash("unevictable_pgs_stranded");
     }
 
-    if(do_swapio == -1) do_swapio = config_get_boolean("plugin:proc:/proc/vmstat", "swap i/o", 1);
-    if(do_io == -1)     do_io = config_get_boolean("plugin:proc:/proc/vmstat", "disk i/o", 1);
-    if(do_pgfaults == -1)   do_pgfaults = config_get_boolean("plugin:proc:/proc/vmstat", "memory page faults", 1);
+    if(do_swapio == -1)    do_swapio = config_get_boolean_ondemand("plugin:proc:/proc/vmstat", "swap i/o", CONFIG_ONDEMAND_ONDEMAND);
+    if(do_io == -1)        do_io = config_get_boolean("plugin:proc:/proc/vmstat", "disk i/o", 1);
+    if(do_pgfaults == -1)  do_pgfaults = config_get_boolean("plugin:proc:/proc/vmstat", "memory page faults", 1);
 
-    if(dt) {};
+    (void)dt;
 
     if(!ff) {
         char filename[FILENAME_MAX + 1];
@@ -415,7 +415,9 @@ int do_proc_vmstat(int update_every, unsigned long long dt) {
 
     // --------------------------------------------------------------------
 
-    if(do_swapio) {
+    if(pswpin || pswpout || do_swapio == CONFIG_ONDEMAND_YES) {
+        do_swapio = CONFIG_ONDEMAND_YES;
+
         static RRDSET *st_swapio = NULL;
         if(!st_swapio) {
             st_swapio = rrdset_create("system", "swapio", NULL, "swap", NULL, "Swap I/O", "kilobytes/s", 250, update_every, RRDSET_TYPE_AREA);
diff --git a/src/registry.c b/src/registry.c
index f2319c478..a0fb629ad 100644
--- a/src/registry.c
+++ b/src/registry.c
@@ -27,8 +27,15 @@
 //    - [DONE] limit the size of PERSON_URL names
 //    - limit the number of requests that add data to the registry,
 //      per client IP per hour
-
-
+//
+// 3. lower memory requirements
+//
+//    - embed avl structures directly into registry objects, instead of DICTIONARY
+//    - store GUIDs in memory as UUID instead of char *
+//      (this will also remove the index hash, since UUIDs can be compared directly)
+//    - do not track persons using the demo machines only
+//      (i.e. start tracking them only when they access a non-demo machine)
+//    - [DONE] do not track custom dashboards by default
 
 #define REGISTRY_URL_FLAGS_DEFAULT 0x00
 #define REGISTRY_URL_FLAGS_EXPIRED 0x01
@@ -328,10 +335,8 @@ static inline URL *registry_url_allocate_nolock(const char *url, size_t urllen)
     return u;
 }
 
-static inline URL *registry_url_get(const char *url, size_t urllen) {
-    debug(D_REGISTRY, "Registry: registry_url_get('%s')", url);
-
-    registry_urls_lock();
+static inline URL *registry_url_get_nolock(const char *url, size_t urllen) {
+    debug(D_REGISTRY, "Registry: registry_url_get_nolock('%s')", url);
 
     URL *u = dictionary_get(registry.urls, url);
     if(!u) {
@@ -339,6 +344,16 @@ static inline URL *registry_url_get(const char *url, size_t urllen) {
         registry.urls_count++;
     }
 
+    return u;
+}
+
+static inline URL *registry_url_get(const char *url, size_t urllen) {
+    debug(D_REGISTRY, "Registry: registry_url_get('%s')", url);
+
+    registry_urls_lock();
+
+    URL *u = registry_url_get_nolock(url, urllen);
+
     registry_urls_unlock();
 
     return u;
@@ -555,7 +570,6 @@ static inline PERSON *registry_person_get(const char *person_guid, time_t when)
         else {
             person_guid = buf;
             p = registry_person_find(person_guid);
-            if(!p) person_guid = NULL;
         }
     }
 
@@ -782,6 +796,7 @@ int registry_log_load(void) {
                     else
                         registry_request_delete(p->guid, machine_guid, url, name, when);
 
+                    registry.log_count++;
                     break;
 
                 default:
@@ -789,7 +804,7 @@ int registry_log_load(void) {
                     break;
             }
         }
-        
+
         fclose(fp);
     }
 
@@ -955,7 +970,7 @@ MACHINE *registry_request_machine(char *person_guid, char *machine_guid, char *u
     // make sure the machine exists
     m = registry_machine_find(request_machine);
     if(!m) {
-        info("Registry Machine URLs request: machine not found, person: '%s', machine '%s', url '%s', request machine '%s'", p->guid, m->guid, pu->url->url, request_machine);
+        info("Registry Machine URLs request: machine not found, person: '%s', machine '%s', url '%s', request machine '%s'", p->guid, machine_guid, pu->url->url, request_machine);
         return NULL;
     }
 
@@ -1227,6 +1242,21 @@ int registry_request_switch_json(struct web_client *w, char *person_guid, char *
 // ----------------------------------------------------------------------------
 // REGISTRY THIS MACHINE UNIQUE ID
 
+static inline int is_machine_guid_blacklisted(const char *guid) {
+    // these are machine GUIDs that have been included in distribution packages.
+    // we blacklist them here, so that the next version of netdata will generate
+    // new ones.
+
+    if(!strcmp(guid, "8a795b0c-2311-11e6-8563-000c295076a6")
+    || !strcmp(guid, "4aed1458-1c3e-11e6-a53f-000c290fc8f5")
+    ) {
+        error("Blacklisted machine GUID '%s' found.", guid);
+        return 1;
+    }
+
+    return 0;
+}
+
 char *registry_get_this_machine_guid(void) {
     if(likely(registry.machine_guid[0]))
         return registry.machine_guid;
@@ -1245,6 +1275,8 @@ char *registry_get_this_machine_guid(void) {
 
                 registry.machine_guid[0] = '\0';
             }
+            else if(is_machine_guid_blacklisted(registry.machine_guid))
+                registry.machine_guid[0] = '\0';
         }
         close(fd);
     }
@@ -1376,6 +1408,8 @@ int registry_save(void) {
         return -2;
     }
 
+    error_log_limit_unlimited();
+
     char tmp_filename[FILENAME_MAX + 1];
     char old_filename[FILENAME_MAX + 1];
 
@@ -1387,6 +1421,7 @@ int registry_save(void) {
     if(!fp) {
         error("Registry: Cannot create file: %s", tmp_filename);
         registry_log_unlock();
+        error_log_limit_reset();
         return -1;
     }
 
@@ -1398,6 +1433,7 @@ int registry_save(void) {
         error("Registry: Cannot save registry machines - return value %d", bytes1);
         fclose(fp);
         registry_log_unlock();
+        error_log_limit_reset();
         return bytes1;
     }
     debug(D_REGISTRY, "Registry: saving machines took %d bytes", bytes1);
@@ -1408,6 +1444,7 @@ int registry_save(void) {
         error("Registry: Cannot save registry persons - return value %d", bytes2);
         fclose(fp);
         registry_log_unlock();
+        error_log_limit_reset();
         return bytes2;
     }
     debug(D_REGISTRY, "Registry: saving persons took %d bytes", bytes2);
@@ -1461,13 +1498,13 @@ int registry_save(void) {
             // it has been moved successfully
             // discard the current registry log
             registry_log_recreate_nolock();
-
             registry.log_count = 0;
         }
     }
 
     // continue operations
     registry_log_unlock();
+    error_log_limit_reset();
 
     return -1;
 }
@@ -1559,7 +1596,8 @@ static inline size_t registry_load(void) {
                 }
                 *url++ = '\0';
 
-                u = registry_url_allocate_nolock(url, strlen(url));
+                // u = registry_url_allocate_nolock(url, strlen(url));
+                u = registry_url_get_nolock(url, strlen(url));
 
                 time_t first_t = strtoul(&s[2], NULL, 16);
 
@@ -1586,7 +1624,8 @@ static inline size_t registry_load(void) {
                 }
 
                 s[1] = s[10] = s[19] = s[28] = s[31] = '\0';
-                u = registry_url_allocate_nolock(&s[32], strlen(&s[32]));
+                // u = registry_url_allocate_nolock(&s[32], strlen(&s[32]));
+                u = registry_url_get_nolock(&s[32], strlen(&s[32]));
 
                 MACHINE_URL *mu = registry_machine_url_allocate(m, u, strtoul(&s[2], NULL, 16));
                 mu->last_t = strtoul(&s[11], NULL, 16);
@@ -1635,7 +1674,7 @@ int registry_init(void) {
     registry.persons_expiration = config_get_number("registry", "registry expire idle persons days", 365) * 86400;
     registry.registry_domain = config_get("registry", "registry domain", "");
     registry.registry_to_announce = config_get("registry", "registry to announce", "https://registry.my-netdata.io");
-    registry.hostname = config_get("registry", "registry hostname", config_get("global", "hostname", hostname));
+    registry.hostname = config_get("registry", "registry hostname", config_get("global", "hostname", localhost.hostname));
     registry.verify_cookies_redirects = config_get_boolean("registry", "verify browser cookies support", 1);
 
     setenv("NETDATA_REGISTRY_HOSTNAME", registry.hostname, 1);
@@ -1685,6 +1724,9 @@ int registry_init(void) {
         registry_log_open_nolock();
         registry_load();
         registry_log_load();
+
+        if(unlikely(registry_should_save_db()))
+            registry_save();
     }
 
     return 0;
diff --git a/src/rrd.c b/src/rrd.c
index 61f99eda8..f9b5d4e04 100644
--- a/src/rrd.c
+++ b/src/rrd.c
@@ -5,10 +5,12 @@
 // ----------------------------------------------------------------------------
 // globals
 
+/*
 // if not zero it gives the time (in seconds) to remove un-updated dimensions
 // DO NOT ENABLE
 // if dimensions are removed, the chart generation will have to run again
 int rrd_delete_unupdated_dimensions = 0;
+*/
 
 int rrd_update_every = UPDATE_EVERY;
 int rrd_default_history_entries = RRD_DEFAULT_HISTORY_ENTRIES;
@@ -42,7 +44,8 @@ RRDHOST localhost = {
             AVL_LOCK_INITIALIZER
         },
         .health_log = {
-            .nextid = 1,
+            .next_log_id = 1,
+            .next_alarm_id = 1,
             .count = 0,
             .max = 1000,
             .alarms = NULL,
@@ -50,6 +53,12 @@ RRDHOST localhost = {
         }
 };
 
+void rrdhost_init(char *hostname) {
+    localhost.hostname = hostname;
+    localhost.health_log.next_log_id =
+        localhost.health_log.next_alarm_id = time(NULL);
+}
+
 void rrdhost_rwlock(RRDHOST *host) {
     pthread_rwlock_wrlock(&host->rrdset_root_rwlock);
 }
@@ -413,8 +422,29 @@ void rrdset_reset(RRDSET *st)
         rd->last_collected_time.tv_sec = 0;
         rd->last_collected_time.tv_usec = 0;
         rd->counter = 0;
-        bzero(rd->values, rd->entries * sizeof(storage_number));
+        memset(rd->values, 0, rd->entries * sizeof(storage_number));
+    }
+}
+static long align_entries_to_pagesize(long entries) {
+    if(entries < 5) entries = 5;
+    if(entries > RRD_HISTORY_ENTRIES_MAX) entries = RRD_HISTORY_ENTRIES_MAX;
+
+#ifdef NETDATA_LOG_ALLOCATIONS
+    long page = (size_t)sysconf(_SC_PAGESIZE);
+
+    long size = sizeof(RRDDIM) + entries * sizeof(storage_number);
+    if(size % page) {
+        size -= (size % page);
+        size += page;
+
+        long n = (size - sizeof(RRDDIM)) / sizeof(storage_number);
+        return n;
     }
+
+    return entries;
+#else
+    return entries;
+#endif
 }
 
 RRDSET *rrdset_create(const char *type, const char *id, const char *name, const char *family, const char *context, const char *title, const char *units, long priority, int update_every, int chart_type)
@@ -441,9 +471,9 @@ RRDSET *rrdset_create(const char *type, const char *id, const char *name, const
         return st;
     }
 
-    long entries = config_get_number(fullid, "history", rrd_default_history_entries);
-    if(entries < 5) entries = config_set_number(fullid, "history", 5);
-    if(entries > RRD_HISTORY_ENTRIES_MAX) entries = config_set_number(fullid, "history", RRD_HISTORY_ENTRIES_MAX);
+    long rentries = config_get_number(fullid, "history", rrd_default_history_entries);
+    long entries = align_entries_to_pagesize(rentries);
+    if(entries != rentries) entries = config_set_number(fullid, "history", entries);
 
     int enabled = config_get_boolean(fullid, "enabled", 1);
     if(!enabled) entries = 5;
@@ -459,29 +489,29 @@ RRDSET *rrdset_create(const char *type, const char *id, const char *name, const
         if(strcmp(st->magic, RRDSET_MAGIC) != 0) {
             errno = 0;
             info("Initializing file %s.", fullfilename);
-            bzero(st, size);
+            memset(st, 0, size);
         }
         else if(strcmp(st->id, fullid) != 0) {
             errno = 0;
             error("File %s contents are not for chart %s. Clearing it.", fullfilename, fullid);
             // munmap(st, size);
             // st = NULL;
-            bzero(st, size);
+            memset(st, 0, size);
         }
         else if(st->memsize != size || st->entries != entries) {
             errno = 0;
             error("File %s does not have the desired size. Clearing it.", fullfilename);
-            bzero(st, size);
+            memset(st, 0, size);
         }
         else if(st->update_every != update_every) {
             errno = 0;
             error("File %s does not have the desired update frequency. Clearing it.", fullfilename);
-            bzero(st, size);
+            memset(st, 0, size);
         }
         else if((time(NULL) - st->last_updated.tv_sec) > update_every * entries) {
             errno = 0;
             error("File %s is too old. Clearing it.", fullfilename);
-            bzero(st, size);
+            memset(st, 0, size);
         }
     }
 
@@ -496,6 +526,7 @@ RRDSET *rrdset_create(const char *type, const char *id, const char *name, const
         st->next = NULL;
         st->mapped = rrd_memory_mode;
         st->variables = NULL;
+        st->alarms = NULL;
     }
     else {
         st = callocz(1, size);
@@ -606,44 +637,44 @@ RRDDIM *rrddim_add(RRDSET *st, const char *id, const char *name, long multiplier
         if(strcmp(rd->magic, RRDDIMENSION_MAGIC) != 0) {
             errno = 0;
             info("Initializing file %s.", fullfilename);
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
         else if(rd->memsize != size) {
             errno = 0;
             error("File %s does not have the desired size. Clearing it.", fullfilename);
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
         else if(rd->multiplier != multiplier) {
             errno = 0;
             error("File %s does not have the same multiplier. Clearing it.", fullfilename);
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
         else if(rd->divisor != divisor) {
             errno = 0;
             error("File %s does not have the same divisor. Clearing it.", fullfilename);
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
         else if(rd->algorithm != algorithm) {
             errno = 0;
             error("File %s does not have the same algorithm. Clearing it.", fullfilename);
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
         else if(rd->update_every != st->update_every) {
             errno = 0;
             error("File %s does not have the same refresh frequency. Clearing it.", fullfilename);
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
         else if(usec_dt(&now, &rd->last_collected_time) > (rd->entries * rd->update_every * 1000000ULL)) {
             errno = 0;
             error("File %s is too old. Clearing it.", fullfilename);
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
         else if(strcmp(rd->id, id) != 0) {
             errno = 0;
             error("File %s contents are not for dimension %s. Clearing it.", fullfilename, id);
             // munmap(rd, size);
             // rd = NULL;
-            bzero(rd, size);
+            memset(rd, 0, size);
         }
     }
 
@@ -927,6 +958,8 @@ collected_number rrddim_set_by_pointer(RRDSET *st, RRDDIM *rd, collected_number
     rd->updated = 1;
     rd->counter++;
 
+    // fprintf(stderr, "%s.%s %llu " COLLECTED_NUMBER_FORMAT " dt %0.6f" " rate " CALCULATED_NUMBER_FORMAT "\n", st->name, rd->name, st->usec_since_last_update, value, (float)((double)st->usec_since_last_update / (double)1000000), (calculated_number)((value - rd->last_collected_value) * (calculated_number)rd->multiplier / (calculated_number)rd->divisor * 1000000.0 / (calculated_number)st->usec_since_last_update));
+
     return rd->last_collected_value;
 }
 
@@ -978,25 +1011,42 @@ unsigned long long rrdset_done(RRDSET *st)
 
     debug(D_RRD_CALLS, "rrdset_done() for chart %s", st->name);
 
-    RRDDIM *rd, *last;
-    int oldstate, store_this_entry = 1, first_entry = 0;
-    unsigned long long last_ut, now_ut, next_ut, stored_entries = 0;
+    RRDDIM *rd;
+
+    int
+        pthreadoldcancelstate;  // store the old cancelable pthread state, to restore it at the end
+
+    char
+        store_this_entry = 1,   // boolean: 1 = store this entry, 0 = don't store this entry
+        first_entry = 0;        // boolean: 1 = this is the first entry seen for this chart, 0 = all other entries
+
+    unsigned int
+        stored_entries = 0;     // the number of entries we have stored in the db, during this call to rrdset_done()
+
+    unsigned long long
+        last_collect_ut,        // the timestamp in microseconds, of the last collected value
+        now_collect_ut,         // the timestamp in microseconds, of this collected value (this is NOW)
+        last_stored_ut,         // the timestamp in microseconds, of the last stored entry in the db
+        next_store_ut,          // the timestamp in microseconds, of the next entry to store in the db
+        update_every_ut = st->update_every * 1000000ULL; // st->update_every in microseconds
 
-    if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldstate) != 0))
+    if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &pthreadoldcancelstate) != 0))
         error("Cannot set pthread cancel state to DISABLE.");
 
     // a read lock is OK here
     pthread_rwlock_rdlock(&st->rwlock);
 
+/*
     // enable the chart, if it was disabled
     if(unlikely(rrd_delete_unupdated_dimensions) && !st->enabled)
         st->enabled = 1;
+*/
 
     // check if the chart has a long time to be updated
-    if(unlikely(st->usec_since_last_update > st->entries * st->update_every * 1000000ULL)) {
+    if(unlikely(st->usec_since_last_update > st->entries * update_every_ut)) {
         info("%s: took too long to be updated (%0.3Lf secs). Reseting it.", st->name, (long double)(st->usec_since_last_update / 1000000.0));
         rrdset_reset(st);
-        st->usec_since_last_update = st->update_every * 1000000ULL;
+        st->usec_since_last_update = update_every_ut;
         first_entry = 1;
     }
     if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: microseconds since last update: %llu", st->name, st->usec_since_last_update);
@@ -1006,6 +1056,7 @@ unsigned long long rrdset_done(RRDSET *st)
         // it is the first entry
         // set the last_collected_time to now
         gettimeofday(&st->last_collected_time, NULL);
+        last_collect_ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec - update_every_ut;
 
         // the first entry should not be stored
         store_this_entry = 0;
@@ -1016,7 +1067,8 @@ unsigned long long rrdset_done(RRDSET *st)
     else {
         // it is not the first entry
         // calculate the proper last_collected_time, using usec_since_last_update
-        unsigned long long ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec + st->usec_since_last_update;
+        last_collect_ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec;
+        unsigned long long ut = last_collect_ut + st->usec_since_last_update;
         st->last_collected_time.tv_sec = (time_t) (ut / 1000000ULL);
         st->last_collected_time.tv_usec = (suseconds_t) (ut % 1000000ULL);
     }
@@ -1038,11 +1090,11 @@ unsigned long long rrdset_done(RRDSET *st)
     }
 
     // check if we will re-write the entire data set
-    if(unlikely(usec_dt(&st->last_collected_time, &st->last_updated) > st->update_every * st->entries * 1000000ULL)) {
+    if(unlikely(usec_dt(&st->last_collected_time, &st->last_updated) > st->entries * update_every_ut)) {
         info("%s: too old data (last updated at %ld.%ld, last collected at %ld.%ld). Reseting it. Will not store the next entry.", st->name, st->last_updated.tv_sec, st->last_updated.tv_usec, st->last_collected_time.tv_sec, st->last_collected_time.tv_usec);
         rrdset_reset(st);
 
-        st->usec_since_last_update = st->update_every * 1000000ULL;
+        st->usec_since_last_update = update_every_ut;
 
         gettimeofday(&st->last_collected_time, NULL);
 
@@ -1056,21 +1108,18 @@ unsigned long long rrdset_done(RRDSET *st)
     }
 
     // these are the 3 variables that will help us in interpolation
-    // last_ut = the last time we added a value to the storage
-    //  now_ut = the time the current value is taken at
-    // next_ut = the time of the next interpolation point
-    last_ut = st->last_updated.tv_sec * 1000000ULL + st->last_updated.tv_usec;
-    now_ut  = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec;
-    next_ut = (st->last_updated.tv_sec + st->update_every) * 1000000ULL;
-
-    if(unlikely(!first_entry && now_ut < next_ut)) {
-        if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: THIS IS IN THE SAME INTERPOLATION POINT", st->name);
-    }
+    // last_stored_ut = the last time we added a value to the storage
+    // now_collect_ut = the time the current value has been collected
+    // next_store_ut  = the time of the next interpolation point
+    last_stored_ut = st->last_updated.tv_sec * 1000000ULL + st->last_updated.tv_usec;
+    now_collect_ut = st->last_collected_time.tv_sec * 1000000ULL + st->last_collected_time.tv_usec;
+    next_store_ut  = (st->last_updated.tv_sec + st->update_every) * 1000000ULL;
 
     if(unlikely(st->debug)) {
-        debug(D_RRD_STATS, "%s: last ut = %0.3Lf (last updated time)", st->name, (long double)last_ut/1000000.0);
-        debug(D_RRD_STATS, "%s: now  ut = %0.3Lf (current update time)", st->name, (long double)now_ut/1000000.0);
-        debug(D_RRD_STATS, "%s: next ut = %0.3Lf (next interpolation point)", st->name, (long double)next_ut/1000000.0);
+        debug(D_RRD_STATS, "%s: last_collect_ut = %0.3Lf (last collection time)", st->name, (long double)last_collect_ut/1000000.0);
+        debug(D_RRD_STATS, "%s: now_collect_ut  = %0.3Lf (current collection time)", st->name, (long double)now_collect_ut/1000000.0);
+        debug(D_RRD_STATS, "%s: last_stored_ut  = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
+        debug(D_RRD_STATS, "%s: next_store_ut   = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
     }
 
     if(unlikely(!st->counter_done)) {
@@ -1082,7 +1131,7 @@ unsigned long long rrdset_done(RRDSET *st)
     // calculate totals and count the dimensions
     int dimensions;
     st->collected_total = 0;
-    for( rd = st->dimensions, dimensions = 0 ; likely(rd) ; rd = rd->next, dimensions++ )
+    for( rd = st->dimensions, dimensions = 0 ; rd ; rd = rd->next, dimensions++ )
         if(likely(rd->updated)) st->collected_total += rd->collected_value;
 
     uint32_t storage_flags = SN_EXISTS;
@@ -1090,7 +1139,7 @@ unsigned long long rrdset_done(RRDSET *st)
     // process all dimensions to calculate their values
     // based on the collected figures only
     // at this stage we do not interpolate anything
-    for( rd = st->dimensions ; likely(rd) ; rd = rd->next ) {
+    for( rd = st->dimensions ; rd ; rd = rd->next ) {
 
         if(unlikely(!rd->updated)) {
             rd->calculated_value = 0;
@@ -1169,7 +1218,7 @@ unsigned long long rrdset_done(RRDSET *st)
                     rd->last_collected_value = rd->collected_value;
                 }
 
-                rd->calculated_value =
+                rd->calculated_value +=
                       (calculated_number)(rd->collected_value - rd->last_collected_value)
                     * (calculated_number)rd->multiplier
                     / (calculated_number)rd->divisor;
@@ -1259,21 +1308,26 @@ unsigned long long rrdset_done(RRDSET *st)
     // at this point we have all the calculated values ready
     // it is now time to interpolate values on a second boundary
 
-    unsigned long long first_ut = last_ut;
-    long long iterations = (now_ut - last_ut) / (st->update_every * 1000000ULL);
-    if((now_ut % (st->update_every * 1000000ULL)) == 0) iterations++;
+    if(unlikely(now_collect_ut < next_store_ut)) {
+        // this is collected in the same interpolation point
+        if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: THIS IS IN THE SAME INTERPOLATION POINT", st->name);
+    }
 
-    for( ; likely(next_ut <= now_ut) ; next_ut += st->update_every * 1000000ULL, iterations-- ) {
+    unsigned long long first_ut = last_stored_ut;
+    long long iterations = (now_collect_ut - last_stored_ut) / (update_every_ut);
+    if((now_collect_ut % (update_every_ut)) == 0) iterations++;
+
+    for( ; next_store_ut <= now_collect_ut ; last_collect_ut = next_store_ut, next_store_ut += update_every_ut, iterations-- ) {
 #ifdef NETDATA_INTERNAL_CHECKS
-        if(iterations < 0) { error("%s: iterations calculation wrapped! first_ut = %llu, last_ut = %llu, next_ut = %llu, now_ut = %llu", st->name, first_ut, last_ut, next_ut, now_ut); }
+        if(iterations < 0) { error("%s: iterations calculation wrapped! first_ut = %llu, last_stored_ut = %llu, next_store_ut = %llu, now_collect_ut = %llu", st->name, first_ut, last_stored_ut, next_store_ut, now_collect_ut); }
 #endif
 
         if(unlikely(st->debug)) {
-            debug(D_RRD_STATS, "%s: last ut = %0.3Lf (last updated time)", st->name, (long double)last_ut/1000000.0);
-            debug(D_RRD_STATS, "%s: next ut = %0.3Lf (next interpolation point)", st->name, (long double)next_ut/1000000.0);
+            debug(D_RRD_STATS, "%s: last_stored_ut = %0.3Lf (last updated time)", st->name, (long double)last_stored_ut/1000000.0);
+            debug(D_RRD_STATS, "%s: next_store_ut  = %0.3Lf (next interpolation point)", st->name, (long double)next_store_ut/1000000.0);
         }
 
-        st->last_updated.tv_sec = (time_t) (next_ut / 1000000ULL);
+        st->last_updated.tv_sec = (time_t) (next_store_ut / 1000000ULL);
         st->last_updated.tv_usec = 0;
 
         for( rd = st->dimensions ; likely(rd) ; rd = rd->next ) {
@@ -1283,8 +1337,8 @@ unsigned long long rrdset_done(RRDSET *st)
                 case RRDDIM_INCREMENTAL:
                     new_value = (calculated_number)
                         (      rd->calculated_value
-                            * (calculated_number)(next_ut - last_ut)
-                            / (calculated_number)(now_ut - last_ut)
+                            * (calculated_number)(next_store_ut - last_collect_ut)
+                            / (calculated_number)(now_collect_ut - last_collect_ut)
                         );
 
                     if(unlikely(st->debug))
@@ -1296,14 +1350,23 @@ unsigned long long rrdset_done(RRDSET *st)
                             , st->id, rd->name
                             , new_value
                             , rd->calculated_value
-                            , (next_ut - last_ut)
-                            , (now_ut - last_ut)
+                            , (next_store_ut - last_stored_ut)
+                            , (now_collect_ut - last_stored_ut)
                             );
 
                     rd->calculated_value -= new_value;
                     new_value += rd->last_calculated_value;
                     rd->last_calculated_value = 0;
                     new_value /= (calculated_number)st->update_every;
+
+                    if(unlikely(next_store_ut - last_stored_ut < update_every_ut)) {
+                        if(unlikely(st->debug))
+                            debug(D_RRD_STATS, "%s/%s: COLLECTION POINT IS SHORT " CALCULATED_NUMBER_FORMAT " - EXTRAPOLATING",
+                                st->id, rd->name
+                                , (calculated_number)(next_store_ut - last_stored_ut)
+                                );
+                        new_value = new_value * (calculated_number)(st->update_every * 1000000) / (calculated_number)(next_store_ut - last_stored_ut);
+                    }
                     break;
 
                 case RRDDIM_ABSOLUTE:
@@ -1323,8 +1386,8 @@ unsigned long long rrdset_done(RRDSET *st)
 
                         new_value = (calculated_number)
                             (   (     (rd->calculated_value - rd->last_calculated_value)
-                                    * (calculated_number)(next_ut - first_ut)
-                                    / (calculated_number)(now_ut - first_ut)
+                                    * (calculated_number)(next_store_ut - last_collect_ut)
+                                    / (calculated_number)(now_collect_ut - last_collect_ut)
                                 )
                                 +  rd->last_calculated_value
                             );
@@ -1338,20 +1401,15 @@ unsigned long long rrdset_done(RRDSET *st)
                                 , st->id, rd->name
                                 , new_value
                                 , rd->calculated_value, rd->last_calculated_value
-                                , (next_ut - first_ut)
-                                , (now_ut - first_ut), rd->last_calculated_value
+                                , (next_store_ut - first_ut)
+                                , (now_collect_ut - first_ut), rd->last_calculated_value
                                 );
-
-                        // this is wrong
-                        // it fades the value towards the target
-                        // while we know the calculated value is different
-                        // if(likely(next_ut + st->update_every * 1000000ULL > now_ut)) rd->calculated_value = new_value;
                     }
                     break;
             }
 
             if(unlikely(!store_this_entry)) {
-                // store_this_entry = 1;
+                rd->values[st->current_entry] = pack_storage_number(0, SN_NOT_EXISTS);
                 continue;
             }
 
@@ -1411,25 +1469,34 @@ unsigned long long rrdset_done(RRDSET *st)
 
         st->counter++;
         st->current_entry = ((st->current_entry + 1) >= st->entries) ? 0 : st->current_entry + 1;
-        last_ut = next_ut;
+        last_stored_ut = next_store_ut;
     }
 
-    // align next interpolation to last collection point
-    if(likely(stored_entries || !store_this_entry)) {
-        st->last_updated.tv_sec = st->last_collected_time.tv_sec;
-        st->last_updated.tv_usec = st->last_collected_time.tv_usec;
-        st->last_collected_total  = st->collected_total;
-    }
+    st->last_collected_total  = st->collected_total;
 
-    for( rd = st->dimensions; likely(rd) ; rd = rd->next ) {
+    for( rd = st->dimensions; rd ; rd = rd->next ) {
         if(unlikely(!rd->updated)) continue;
 
-        if(likely(stored_entries || !store_this_entry)) {
-            if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_collected_value (old: " COLLECTED_NUMBER_FORMAT ") to last_collected_value (new: " COLLECTED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_collected_value, rd->collected_value);
-            rd->last_collected_value = rd->collected_value;
+        if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_collected_value (old: " COLLECTED_NUMBER_FORMAT ") to last_collected_value (new: " COLLECTED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_collected_value, rd->collected_value);
+        rd->last_collected_value = rd->collected_value;
+
+        switch(rd->algorithm) {
+            case RRDDIM_INCREMENTAL:
+                if(unlikely(!first_entry)) {
+                    if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_calculated_value (old: " CALCULATED_NUMBER_FORMAT ") to last_calculated_value (new: " CALCULATED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_calculated_value + rd->calculated_value, rd->calculated_value);
+                    rd->last_calculated_value += rd->calculated_value;
+                }
+                else {
+                    if(unlikely(st->debug)) debug(D_RRD_STATS, "%s: THIS IS THE FIRST POINT", st->name);
+                }
+                break;
 
-            if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_calculated_value (old: " CALCULATED_NUMBER_FORMAT ") to last_calculated_value (new: " CALCULATED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_calculated_value, rd->calculated_value);
-            rd->last_calculated_value = rd->calculated_value;
+            case RRDDIM_ABSOLUTE:
+            case RRDDIM_PCENT_OVER_ROW_TOTAL:
+            case RRDDIM_PCENT_OVER_DIFF_TOTAL:
+                if(unlikely(st->debug)) debug(D_RRD_STATS, "%s/%s: setting last_calculated_value (old: " CALCULATED_NUMBER_FORMAT ") to last_calculated_value (new: " CALCULATED_NUMBER_FORMAT ")", st->id, rd->name, rd->last_calculated_value, rd->calculated_value);
+                rd->last_calculated_value = rd->calculated_value;
+                break;
         }
 
         rd->calculated_value = 0;
@@ -1452,6 +1519,7 @@ unsigned long long rrdset_done(RRDSET *st)
     // ALL DONE ABOUT THE DATA UPDATE
     // --------------------------------------------------------------------
 
+/*
     // find if there are any obsolete dimensions (not updated recently)
     if(unlikely(rrd_delete_unupdated_dimensions)) {
 
@@ -1460,6 +1528,7 @@ unsigned long long rrdset_done(RRDSET *st)
                 break;
 
         if(unlikely(rd)) {
+            RRDDIM *last;
             // there is dimension to free
             // upgrade our read lock to a write lock
             pthread_rwlock_unlock(&st->rwlock);
@@ -1497,11 +1566,12 @@ unsigned long long rrdset_done(RRDSET *st)
             }
         }
     }
+*/
 
     pthread_rwlock_unlock(&st->rwlock);
 
-    if(unlikely(pthread_setcancelstate(oldstate, NULL) != 0))
-        error("Cannot set pthread cancel state to RESTORE (%d).", oldstate);
+    if(unlikely(pthread_setcancelstate(pthreadoldcancelstate, NULL) != 0))
+        error("Cannot set pthread cancel state to RESTORE (%d).", pthreadoldcancelstate);
 
     return(st->usec_since_last_update);
 }
diff --git a/src/rrd.h b/src/rrd.h
index 37eb121e7..92a65fe8a 100644
--- a/src/rrd.h
+++ b/src/rrd.h
@@ -277,7 +277,7 @@ struct rrdset {
     // ------------------------------------------------------------------------
     // the dimensions
 
-    avl_tree_lock dimensions_index;                     // the root of the dimensions index
+    avl_tree_lock dimensions_index;                 // the root of the dimensions index
     RRDDIM *dimensions;                             // the actual data for every dimension
 
 };
@@ -310,6 +310,7 @@ struct rrdhost {
 };
 typedef struct rrdhost RRDHOST;
 extern RRDHOST localhost;
+extern void rrdhost_init(char *hostname);
 
 #ifdef NETDATA_INTERNAL_CHECKS
 #define rrdhost_check_wrlock(host) rrdhost_check_wrlock_int(host, __FILE__, __FUNCTION__, __LINE__)
diff --git a/src/rrd2json.c b/src/rrd2json.c
index 9009a8b1d..474b5915d 100644
--- a/src/rrd2json.c
+++ b/src/rrd2json.c
@@ -1,8 +1,5 @@
 #include "common.h"
 
-#define HOSTNAME_MAX 1024
-char *hostname = "unknown";
-
 void rrd_stats_api_v1_chart(RRDSET *st, BUFFER *wb)
 {
     pthread_rwlock_rdlock(&st->rwlock);
@@ -84,7 +81,7 @@ void rrd_stats_api_v1_charts(BUFFER *wb)
         ",\n\t\"update_every\": %d"
         ",\n\t\"history\": %d"
         ",\n\t\"charts\": {"
-        , hostname
+        , localhost.hostname
         , rrd_update_every
         , rrd_default_history_entries
         );
@@ -246,7 +243,7 @@ void rrd_stats_all_json(BUFFER *wb)
         "\t\"history\": %d,\n"
         "\t\"memory\": %lu\n"
         "}\n"
-        , hostname
+        , localhost.hostname
         , rrd_update_every
         , rrd_default_history_entries
         , memory
@@ -1217,13 +1214,13 @@ RRDR *rrd2rrdr(RRDSET *st, long points, long long after, long long before, int g
         absolute_period_requested = 0;
     }
 
-    // allow relative for before and after
-    if(((before < 0)?-before:before) <= (st->update_every * st->entries)) {
+    // allow relative for before and after (smaller than 3 years)
+    if(((before < 0)?-before:before) <= (3 * 365 * 86400)) {
         before = last_entry_t + before;
         absolute_period_requested = 0;
     }
 
-    if(((after < 0)?-after:after) <= (st->update_every * st->entries)) {
+    if(((after < 0)?-after:after) <= (3 * 365 * 86400)) {
         if(after == 0) after = -st->update_every;
         after = before + after;
         absolute_period_requested = 0;
@@ -1567,9 +1564,9 @@ int rrd2value(RRDSET *st, BUFFER *wb, calculated_number *n, const char *dimensio
     }
 
     if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
-        wb->options |= WB_CONTENT_NO_CACHEABLE;
+        buffer_no_cacheable(wb);
     else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
-        wb->options |= WB_CONTENT_CACHEABLE;
+        buffer_cacheable(wb);
 
     options = rrdr_check_options(r, options, dimensions);
 
@@ -1595,9 +1592,9 @@ int rrd2format(RRDSET *st, BUFFER *wb, BUFFER *dimensions, uint32_t format, long
     }
 
     if(r->result_options & RRDR_RESULT_OPTION_RELATIVE)
-        wb->options |= WB_CONTENT_NO_CACHEABLE;
+        buffer_no_cacheable(wb);
     else if(r->result_options & RRDR_RESULT_OPTION_ABSOLUTE)
-        wb->options |= WB_CONTENT_CACHEABLE;
+        buffer_cacheable(wb);
 
     options = rrdr_check_options(r, options, (dimensions)?buffer_tostring(dimensions):NULL);
 
diff --git a/src/sys_fs_cgroup.c b/src/sys_fs_cgroup.c
index 892f737c1..298f38a38 100644
--- a/src/sys_fs_cgroup.c
+++ b/src/sys_fs_cgroup.c
@@ -138,6 +138,18 @@ struct memory {
     unsigned long long total_active_file;
     unsigned long long total_unevictable;
 */
+
+    int usage_in_bytes_updated;
+    char *filename_usage_in_bytes;
+    unsigned long long usage_in_bytes;
+
+    int msw_usage_in_bytes_updated;
+    char *filename_msw_usage_in_bytes;
+    unsigned long long msw_usage_in_bytes;
+
+    int failcnt_updated;
+    char *filename_failcnt;
+    unsigned long long failcnt;
 };
 
 // https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
@@ -160,9 +172,13 @@ struct cpuacct_usage {
     unsigned long long *cpu_percpu;
 };
 
+#define CGROUP_OPTIONS_DISABLED_DUPLICATE 0x00000001
+
 struct cgroup {
-    int available;      // found in the filesystem
-    int enabled;        // enabled in the config
+    uint32_t options;
+
+    char available;      // found in the filesystem
+    char enabled;        // enabled in the config
 
     char *id;
     uint32_t hash;
@@ -553,6 +569,24 @@ void cgroup_read_memory(struct memory *mem) {
 
         mem->updated = 1;
     }
+
+    mem->usage_in_bytes_updated = 0;
+    if(mem->filename_usage_in_bytes) {
+        if(likely(!read_single_number_file(mem->filename_usage_in_bytes, &mem->usage_in_bytes)))
+            mem->usage_in_bytes_updated = 1;
+    }
+
+    mem->msw_usage_in_bytes_updated = 0;
+    if(mem->filename_msw_usage_in_bytes) {
+        if(likely(!read_single_number_file(mem->filename_msw_usage_in_bytes, &mem->msw_usage_in_bytes)))
+            mem->msw_usage_in_bytes_updated = 1;
+    }
+
+    mem->failcnt_updated = 0;
+    if(mem->filename_failcnt) {
+        if(likely(!read_single_number_file(mem->filename_failcnt, &mem->failcnt)))
+            mem->failcnt_updated = 1;
+    }
 }
 
 void cgroup_read(struct cgroup *cg) {
@@ -714,11 +748,18 @@ struct cgroup *cgroup_add(const char *id) {
                 if (!strncmp(t->chart_id, "/system.slice/", 14) && !strncmp(cg->chart_id, "/init.scope/system.slice/", 25)) {
                     error("Control group with chart id '%s' already exists with id '%s' and is enabled. Swapping them by enabling cgroup with id '%s' and disabling cgroup with id '%s'.",
                           cg->chart_id, t->id, cg->id, t->id);
+                    debug(D_CGROUP, "Control group with chart id '%s' already exists with id '%s' and is enabled. Swapping them by enabling cgroup with id '%s' and disabling cgroup with id '%s'.",
+                          cg->chart_id, t->id, cg->id, t->id);
                     t->enabled = 0;
-                } else {
-                    error("Control group with chart id '%s' already exists with id '%s' and is enabled. Disabling cgroup with id '%s'.",
+                    t->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE;
+                }
+                else {
+                    error("Control group with chart id '%s' already exists with id '%s' and is enabled and available. Disabling cgroup with id '%s'.",
+                          cg->chart_id, t->id, cg->id);
+                    debug(D_CGROUP, "Control group with chart id '%s' already exists with id '%s' and is enabled and available. Disabling cgroup with id '%s'.",
                           cg->chart_id, t->id, cg->id);
                     cg->enabled = 0;
+                    cg->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE;
                 }
 
                 break;
@@ -865,8 +906,9 @@ void mark_all_cgroups_as_not_available() {
     struct cgroup *cg;
 
     // mark all as not available
-    for(cg = cgroup_root; cg ; cg = cg->next)
+    for(cg = cgroup_root; cg ; cg = cg->next) {
         cg->available = 0;
+    }
 }
 
 void cleanup_all_cgroups() {
@@ -874,6 +916,18 @@ void cleanup_all_cgroups() {
 
     for(; cg ;) {
         if(!cg->available) {
+            // enable the first duplicate cgroup
+            {
+                struct cgroup *t;
+                for(t = cgroup_root; t ; t = t->next) {
+                    if(t != cg && t->available && !t->enabled && t->options & CGROUP_OPTIONS_DISABLED_DUPLICATE && t->hash_chart == cg->hash_chart && !strcmp(t->chart_id, cg->chart_id)) {
+                        debug(D_CGROUP, "Enabling duplicate of cgroup '%s' with id '%s', because the original with id '%s' stopped.", t->chart_id, t->id, cg->id);
+                        t->enabled = 1;
+                        t->options &= ~CGROUP_OPTIONS_DISABLED_DUPLICATE;
+                        break;
+                    }
+                }
+            }
 
             if(!last)
                 cgroup_root = cg->next;
@@ -966,6 +1020,27 @@ void find_all_cgroups() {
                 debug(D_CGROUP, "memory.stat filename for cgroup '%s': '%s'", cg->id, cg->memory.filename);
             }
             else debug(D_CGROUP, "memory.stat file for cgroup '%s': '%s' does not exist.", cg->id, filename);
+
+            snprintfz(filename, FILENAME_MAX, "%s%s/memory.usage_in_bytes", cgroup_memory_base, cg->id);
+            if(stat(filename, &buf) != -1) {
+                cg->memory.filename_usage_in_bytes = strdupz(filename);
+                debug(D_CGROUP, "memory.usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_usage_in_bytes);
+            }
+            else debug(D_CGROUP, "memory.usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
+
+            snprintfz(filename, FILENAME_MAX, "%s%s/memory.msw_usage_in_bytes", cgroup_memory_base, cg->id);
+            if(stat(filename, &buf) != -1) {
+                cg->memory.filename_msw_usage_in_bytes = strdupz(filename);
+                debug(D_CGROUP, "memory.msw_usage_in_bytes filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_msw_usage_in_bytes);
+            }
+            else debug(D_CGROUP, "memory.msw_usage_in_bytes file for cgroup '%s': '%s' does not exist.", cg->id, filename);
+
+            snprintfz(filename, FILENAME_MAX, "%s%s/memory.failcnt", cgroup_memory_base, cg->id);
+            if(stat(filename, &buf) != -1) {
+                cg->memory.filename_failcnt = strdupz(filename);
+                debug(D_CGROUP, "memory.failcnt filename for cgroup '%s': '%s'", cg->id, cg->memory.filename_failcnt);
+            }
+            else debug(D_CGROUP, "memory.failcnt file for cgroup '%s': '%s' does not exist.", cg->id, filename);
         }
         if(cgroup_enable_blkio) {
             if(!cg->io_service_bytes.filename) {
@@ -1053,7 +1128,7 @@ void update_cgroup_charts(int update_every) {
         if(cg->cpuacct_stat.updated) {
             st = rrdset_find_bytype(type, "cpu");
             if(!st) {
-                snprintfz(title, CHART_TITLE_MAX, "CPU Usage for cgroup %s", cg->chart_title);
+                snprintfz(title, CHART_TITLE_MAX, "CPU Usage (%d%% = %d core%s) for cgroup %s", (processors * 100), processors, (processors>1)?"s":"", cg->chart_title);
                 st = rrdset_create(type, "cpu", NULL, "cpu", "cgroup.cpu", title, "%", 40000, update_every, RRDSET_TYPE_STACKED);
 
                 rrddim_add(st, "user", NULL, 100, hz, RRDDIM_INCREMENTAL);
@@ -1072,7 +1147,7 @@ void update_cgroup_charts(int update_every) {
 
             st = rrdset_find_bytype(type, "cpu_per_core");
             if(!st) {
-                snprintfz(title, CHART_TITLE_MAX, "CPU Usage Per Core for cgroup %s", cg->chart_title);
+                snprintfz(title, CHART_TITLE_MAX, "CPU Usage (%d%% = %d core%s) Per Core for cgroup %s", (processors * 100), processors, (processors>1)?"s":"", cg->chart_title);
                 st = rrdset_create(type, "cpu_per_core", NULL, "cpu", "cgroup.cpu_per_core", title, "%", 40100, update_every, RRDSET_TYPE_STACKED);
 
                 for(i = 0; i < cg->cpuacct_usage.cpus ;i++) {
@@ -1094,7 +1169,7 @@ void update_cgroup_charts(int update_every) {
                 st = rrdset_find_bytype(type, "mem");
                 if(!st) {
                     snprintfz(title, CHART_TITLE_MAX, "Memory Usage for cgroup %s", cg->chart_title);
-                    st = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40200, update_every,
+                    st = rrdset_create(type, "mem", NULL, "mem", "cgroup.mem", title, "MB", 40210, update_every,
                                        RRDSET_TYPE_STACKED);
 
                     rrddim_add(st, "cache", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
@@ -1167,6 +1242,38 @@ void update_cgroup_charts(int update_every) {
             }
         }
 
+        if(cg->memory.usage_in_bytes_updated) {
+            st = rrdset_find_bytype(type, "mem_usage");
+            if(!st) {
+                snprintfz(title, CHART_TITLE_MAX, "Total Memory for cgroup %s", cg->chart_title);
+                st = rrdset_create(type, "mem_usage", NULL, "mem", "cgroup.mem_usage", title, "MB", 40200,
+                                   update_every, RRDSET_TYPE_STACKED);
+
+                rrddim_add(st, "ram", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
+                rrddim_add(st, "swap", NULL, 1, 1024 * 1024, RRDDIM_ABSOLUTE);
+            }
+            else rrdset_next(st);
+
+            rrddim_set(st, "ram", cg->memory.usage_in_bytes);
+            rrddim_set(st, "swap", (cg->memory.msw_usage_in_bytes > cg->memory.usage_in_bytes)?cg->memory.msw_usage_in_bytes - cg->memory.usage_in_bytes:0);
+            rrdset_done(st);
+        }
+
+        if(cg->memory.failcnt_updated && cg->memory.failcnt > 0) {
+            st = rrdset_find_bytype(type, "mem_failcnt");
+            if(!st) {
+                snprintfz(title, CHART_TITLE_MAX, "Memory Limit Failures for cgroup %s", cg->chart_title);
+                st = rrdset_create(type, "mem_failcnt", NULL, "mem", "cgroup.mem_failcnt", title, "MB", 40250,
+                                   update_every, RRDSET_TYPE_LINE);
+
+                rrddim_add(st, "failures", NULL, 1, 1, RRDDIM_INCREMENTAL);
+            }
+            else rrdset_next(st);
+
+            rrddim_set(st, "failures", cg->memory.failcnt);
+            rrdset_done(st);
+        }
+
         if(cg->io_service_bytes.updated && cg->io_service_bytes.Read + cg->io_service_bytes.Write > 0) {
             st = rrdset_find_bytype(type, "io");
             if(!st) {
@@ -1302,7 +1409,7 @@ int do_sys_fs_cgroup(int update_every, unsigned long long dt) {
 
 void *cgroups_main(void *ptr)
 {
-    if(ptr) { ; }
+    (void)ptr;
 
     info("CGROUP Plugin thread created with task id %d", gettid());
 
@@ -1327,7 +1434,7 @@ void *cgroups_main(void *ptr)
 
     RRDSET *stcpu_thread = NULL;
 
-    for(;1;) {
+    for(;;) {
         if(unlikely(netdata_exit)) break;
 
         // delay until it is our time to run
@@ -1372,6 +1479,8 @@ void *cgroups_main(void *ptr)
         }
     }
 
+    info("CGROUP thread exiting");
+
     pthread_exit(NULL);
     return NULL;
 }
diff --git a/src/unit_test.c b/src/unit_test.c
index a77fdb134..d699707a4 100644
--- a/src/unit_test.c
+++ b/src/unit_test.c
@@ -379,7 +379,7 @@ struct feed_values test4_feed[] = {
 };
 
 calculated_number test4_results[] = {
-        5, 10, 10, 10, 10, 10, 10, 10, 10
+        10, 10, 10, 10, 10, 10, 10, 10, 10
 };
 
 struct test test4 = {
@@ -414,7 +414,7 @@ struct feed_values test5_feed[] = {
 };
 
 calculated_number test5_results[] = {
-        500, 500, 0, 500, 500, 0, 0, 0, 0
+        1000, 500, 0, 500, 500, 0, 0, 0, 0
 };
 
 struct test test5 = {
@@ -455,7 +455,7 @@ struct feed_values test6_feed[] = {
 };
 
 calculated_number test6_results[] = {
-        3000, 4000, 4000, 4000
+        4000, 4000, 4000, 4000
 };
 
 struct test test6 = {
@@ -490,7 +490,7 @@ struct feed_values test7_feed[] = {
 };
 
 calculated_number test7_results[] = {
-        250, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500
+        500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500, 500
 };
 
 struct test test7 = {
@@ -597,7 +597,7 @@ struct feed_values test10_feed[] = {
 };
 
 calculated_number test10_results[] = {
-        500, 1000, 1000, 1000, 1000, 1000, 1000
+        1000, 1000, 1000, 1000, 1000, 1000, 1000
 };
 
 struct test test10 = {
@@ -737,6 +737,148 @@ struct test test13 = {
 };
 
 // --------------------------------------------------------------------------------------------------------------------
+// test14
+
+struct feed_values test14_feed[] = {
+        {        0, 0x015397dc42151c41ULL },
+        { 13573000, 0x015397e612e3ff5dULL },
+        { 29969000, 0x015397f905ecdaa8ULL },
+        { 29958000, 0x0153980c2a6cb5e4ULL },
+        { 30054000, 0x0153981f4032fb83ULL },
+        { 34952000, 0x015398355efadaccULL },
+        { 25046000, 0x01539845ba4b09f8ULL },
+        { 29947000, 0x0153985948bf381dULL },
+        { 30054000, 0x0153986c5b9c27e2ULL },
+        { 29942000, 0x0153987f888982d0ULL },
+};
+
+calculated_number test14_results[] = {
+        23.1383300, 21.8515600, 21.8804600, 21.7788000, 22.0112200, 22.4386100, 22.0906100, 21.9150800
+};
+
+struct test test14 = {
+        "test14",            // name
+        "issue #981 with real data",
+        30,                 // update_every
+        8,                  // multiplier
+        1000000000,         // divisor
+        RRDDIM_INCREMENTAL, // algorithm
+        10,                 // feed entries
+        8,                  // result entries
+        test14_feed,        // feed
+        test14_results,     // results
+        NULL,               // feed2
+        NULL                // results2
+};
+
+struct feed_values test14b_feed[] = {
+        {        0, 0 },
+        { 13573000, 13573000 },
+        { 29969000, 13573000 + 29969000 },
+        { 29958000, 13573000 + 29969000 + 29958000 },
+        { 30054000, 13573000 + 29969000 + 29958000 + 30054000 },
+        { 34952000, 13573000 + 29969000 + 29958000 + 30054000 + 34952000 },
+        { 25046000, 13573000 + 29969000 + 29958000 + 30054000 + 34952000 + 25046000 },
+        { 29947000, 13573000 + 29969000 + 29958000 + 30054000 + 34952000 + 25046000 + 29947000 },
+        { 30054000, 13573000 + 29969000 + 29958000 + 30054000 + 34952000 + 25046000 + 29947000 + 30054000 },
+        { 29942000, 13573000 + 29969000 + 29958000 + 30054000 + 34952000 + 25046000 + 29947000 + 30054000 + 29942000 },
+};
+
+calculated_number test14b_results[] = {
+        1000000, 1000000, 1000000, 1000000, 1000000, 1000000, 1000000, 1000000
+};
+
+struct test test14b = {
+        "test14b",            // name
+        "issue #981 with dummy data",
+        30,                 // update_every
+        1,                  // multiplier
+        1,                  // divisor
+        RRDDIM_INCREMENTAL, // algorithm
+        10,                 // feed entries
+        8,                  // result entries
+        test14b_feed,        // feed
+        test14b_results,     // results
+        NULL,               // feed2
+        NULL                // results2
+};
+
+struct feed_values test14c_feed[] = {
+        { 29000000, 29000000 },
+        {  1000000, 29000000 + 1000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 + 30000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 + 30000000 + 30000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 + 30000000 + 30000000 + 30000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 },
+        { 30000000, 29000000 + 1000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 + 30000000 },
+};
+
+calculated_number test14c_results[] = {
+        1000000, 1000000, 1000000, 1000000, 1000000, 1000000, 1000000, 1000000, 1000000
+};
+
+struct test test14c = {
+        "test14c",            // name
+        "issue #981 with dummy data, checking for late start",
+        30,                 // update_every
+        1,                  // multiplier
+        1,                  // divisor
+        RRDDIM_INCREMENTAL, // algorithm
+        10,                 // feed entries
+        9,                  // result entries
+        test14c_feed,        // feed
+        test14c_results,     // results
+        NULL,               // feed2
+        NULL                // results2
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+// test15
+
+struct feed_values test15_feed[] = {
+        {       0, 1068066388 },
+        { 1008752, 1068822698 },
+        {  993809, 1069573072 },
+        {  995911, 1070324135 },
+        { 1014562, 1071078166 },
+        {  994684, 1071831349 },
+        {  993128, 1072235739 },
+        { 1010332, 1072958871 },
+        { 1003394, 1073707019 },
+        {  995201, 1074460255 },
+};
+
+collected_number test15_feed2[] = {
+    178825286, 178825286, 178825286, 178825286, 178825498, 178825498, 179165652, 179202964, 179203282, 179204130
+};
+
+calculated_number test15_results[] = {
+        5857.4080000, 5898.4540000, 5891.6590000, 5806.3160000, 5914.2640000, 3202.2630000, 5589.6560000, 5822.5260000, 5911.7520000
+};
+
+calculated_number test15_results2[] = {
+        0.0000000, 0.0000000, 0.0024944, 1.6324779, 0.0212777, 2655.1890000, 290.5387000, 5.6733610, 6.5960220
+};
+
+struct test test15 = {
+        "test15",           // name
+        "test incremental with 2 dimensions",
+        1,                  // update_every
+        8,                  // multiplier
+        1024,               // divisor
+        RRDDIM_INCREMENTAL, // algorithm
+        10,                 // feed entries
+        9,                  // result entries
+        test15_feed,        // feed
+        test15_results,     // results
+        test15_feed2,       // feed2
+        test15_results2     // results2
+};
+
+// --------------------------------------------------------------------------------------------------------------------
 
 int run_test(struct test *test)
 {
@@ -749,7 +891,7 @@ int run_test(struct test *test)
     snprintfz(name, 100, "unittest-%s", test->name);
 
     // create the chart
-    RRDSET *st = rrdset_create("netdata", name, name, "netdata", NULL, "Unit Testing", "a value", 1, 1, RRDSET_TYPE_LINE);
+    RRDSET *st = rrdset_create("netdata", name, name, "netdata", NULL, "Unit Testing", "a value", 1, test->update_every, RRDSET_TYPE_LINE);
     RRDDIM *rd = rrddim_add(st, "dim1", NULL, test->multiplier, test->divisor, test->algorithm);
     
     RRDDIM *rd2 = NULL;
@@ -759,12 +901,20 @@ int run_test(struct test *test)
     st->debug = 1;
 
     // feed it with the test data
+    time_t time_now = 0, time_start = time(NULL);
     unsigned long c;
+    collected_number last = 0;
     for(c = 0; c < test->feed_entries; c++) {
         if(debug_flags) fprintf(stderr, "\n\n");
 
         if(c) {
-            fprintf(stderr, "    > %s: feeding position %lu, after %llu microseconds\n", test->name, c+1, test->feed[c].microseconds);
+            time_now += test->feed[c].microseconds;
+            fprintf(stderr, "    > %s: feeding position %lu, after %0.3f seconds (%0.3f seconds from start), delta " CALCULATED_NUMBER_FORMAT ", rate " CALCULATED_NUMBER_FORMAT "\n", 
+                test->name, c+1,
+                (float)test->feed[c].microseconds / 1000000.0,
+                (float)time_now / 1000000.0,
+                ((calculated_number)test->feed[c].value - (calculated_number)last) * (calculated_number)test->multiplier / (calculated_number)test->divisor,
+                (((calculated_number)test->feed[c].value - (calculated_number)last) * (calculated_number)test->multiplier / (calculated_number)test->divisor) / (calculated_number)test->feed[c].microseconds * (calculated_number)1000000);
             rrdset_next_usec(st, test->feed[c].microseconds);
         }
         else {
@@ -773,6 +923,7 @@ int run_test(struct test *test)
 
         fprintf(stderr, "       >> %s with value " COLLECTED_NUMBER_FORMAT "\n", rd->name, test->feed[c].value);
         rrddim_set(st, "dim1", test->feed[c].value);
+        last = test->feed[c].value;
 
         if(rd2) {
             fprintf(stderr, "       >> %s with value " COLLECTED_NUMBER_FORMAT "\n", rd2->name, test->feed2[c]);
@@ -785,6 +936,7 @@ int run_test(struct test *test)
         if(!c) {
             fprintf(stderr, "    > %s: fixing first collection time to be %llu microseconds to second boundary\n", test->name, test->feed[c].microseconds);
             rd->last_collected_time.tv_usec = st->last_collected_time.tv_usec = st->last_updated.tv_usec = test->feed[c].microseconds;
+            // time_start = st->last_collected_time.tv_sec;
         }
     }
 
@@ -801,14 +953,21 @@ int run_test(struct test *test)
         calculated_number v = unpack_storage_number(rd->values[c]);
         calculated_number n = test->results[c];
         int same = (roundl(v * 10000000.0) == roundl(n * 10000000.0))?1:0;
-        fprintf(stderr, "    %s/%s: checking position %lu, expecting value " CALCULATED_NUMBER_FORMAT ", found " CALCULATED_NUMBER_FORMAT ", %s\n", test->name, rd->name, c+1, n, v, (same)?"OK":"### E R R O R ###");
+        fprintf(stderr, "    %s/%s: checking position %lu (at %lu secs), expecting value " CALCULATED_NUMBER_FORMAT ", found " CALCULATED_NUMBER_FORMAT ", %s\n",
+            test->name, rd->name, c+1,
+            (rrdset_first_entry_t(st) + c * st->update_every) - time_start,
+            n, v, (same)?"OK":"### E R R O R ###");
+
         if(!same) errors++;
 
         if(rd2) {
             v = unpack_storage_number(rd2->values[c]);
             n = test->results2[c];
             same = (roundl(v * 10000000.0) == roundl(n * 10000000.0))?1:0;
-            fprintf(stderr, "    %s/%s: checking position %lu, expecting value " CALCULATED_NUMBER_FORMAT ", found " CALCULATED_NUMBER_FORMAT ", %s\n", test->name, rd2->name, c+1, n, v, (same)?"OK":"### E R R O R ###");
+            fprintf(stderr, "    %s/%s: checking position %lu (at %lu secs), expecting value " CALCULATED_NUMBER_FORMAT ", found " CALCULATED_NUMBER_FORMAT ", %s\n",
+                test->name, rd2->name, c+1,
+                (rrdset_first_entry_t(st) + c * st->update_every) - time_start,
+                n, v, (same)?"OK":"### E R R O R ###");
             if(!same) errors++;
         }
     }
@@ -857,6 +1016,18 @@ int run_all_mockup_tests(void)
     if(run_test(&test13))
         return 1;
 
+    if(run_test(&test14))
+        return 1;
+
+    if(run_test(&test14b))
+        return 1;
+
+    if(run_test(&test14c))
+        return 1;
+
+    if(run_test(&test15))
+        return 1;
+
     return 0;
 }
 
diff --git a/src/web_buffer.c b/src/web_buffer.c
index 01a97ddc9..93ba782af 100644
--- a/src/web_buffer.c
+++ b/src/web_buffer.c
@@ -35,6 +35,7 @@ void buffer_reset(BUFFER *wb)
     wb->contenttype = CT_TEXT_PLAIN;
     wb->options = 0;
     wb->date = 0;
+    wb->expires = 0;
 
     buffer_overflow_check(wb);
 }
diff --git a/src/web_buffer.h b/src/web_buffer.h
index c4cd05632..ee611209b 100644
--- a/src/web_buffer.h
+++ b/src/web_buffer.h
@@ -4,12 +4,13 @@
 #define WEB_DATA_LENGTH_INCREASE_STEP 1024
 
 typedef struct web_buffer {
-    size_t size;        // allocation size of buffer
-    size_t len;     // current data length in buffer
-    char *buffer;   // the buffer
-    uint8_t contenttype;
-    uint8_t options;
-    time_t date;    // the date this content has been generated
+    size_t size;        	// allocation size of buffer, in bytes
+    size_t len;     		// current data length in buffer, in bytes
+    char *buffer;   		// the buffer itself
+    uint8_t contenttype;	// the content type of the data in the buffer
+    uint8_t options;		// options related to the content
+    time_t date;    		// the timestamp this content has been generated
+    time_t expires;			// the timestamp this content expires
 } BUFFER;
 
 // options
@@ -39,6 +40,9 @@ typedef struct web_buffer {
 #define CT_IMAGE_ICNS                   20
 #define CT_IMAGE_BMP                    21
 
+#define buffer_cacheable(wb)    do { (wb)->options |= WB_CONTENT_CACHEABLE;    if((wb)->options & WB_CONTENT_NO_CACHEABLE) (wb)->options &= ~WB_CONTENT_NO_CACHEABLE; } while(0)
+#define buffer_no_cacheable(wb) do { (wb)->options |= WB_CONTENT_NO_CACHEABLE; if((wb)->options & WB_CONTENT_CACHEABLE)    (wb)->options &= ~WB_CONTENT_CACHEABLE;  (wb)->expires = 0; } while(0)
+
 #define buffer_strlen(wb) ((wb)->len)
 extern const char *buffer_tostring(BUFFER *wb);
 
diff --git a/src/web_buffer_svg.c b/src/web_buffer_svg.c
index 2f7627cc5..3e847b5d9 100644
--- a/src/web_buffer_svg.c
+++ b/src/web_buffer_svg.c
@@ -529,7 +529,7 @@ void buffer_svg(BUFFER *wb, const char *label, calculated_number value, const ch
         strcpy(value_string, "-");
 
     else if(precision < 0) {
-        int len, l, lstop = 0;
+        int len, lstop = 0, trim_zeros = 1;
 
         calculated_number abs = value;
         if(isless(value, 0)) {
@@ -537,27 +537,30 @@ void buffer_svg(BUFFER *wb, const char *label, calculated_number value, const ch
             abs = -value;
         }
 
-        if(isgreaterequal(abs, 1000))     len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.0Lf", (long double)value);
-        else if(isgreaterequal(abs, 100)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.1Lf", (long double)value);
-        else if(isgreaterequal(abs, 1))   len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.2Lf", (long double)value);
-        else if(isgreaterequal(abs, 0.1)) len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.3Lf", (long double)value);
-        else                              len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.4Lf", (long double)value);
-
-        // remove trailing zeros
-        for(l = len - 1; l > lstop ; l--) {
-            if(likely(value_string[l] == '0')) {
-                value_string[l] = '\0';
-                len--;
-            }
+        if(isgreaterequal(abs, 1000))     { len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.0Lf", (long double)value); trim_zeros = 0; }
+        else if(isgreaterequal(abs, 100))   len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.1Lf", (long double)value);
+        else if(isgreaterequal(abs, 1))     len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.2Lf", (long double)value);
+        else if(isgreaterequal(abs, 0.1))   len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.3Lf", (long double)value);
+        else                                len = snprintfz(value_string, VALUE_STRING_SIZE, "%0.4Lf", (long double)value);
+
+        if(unlikely(trim_zeros)) {
+            int l;
+            // remove trailing zeros from the decimal part
+            for(l = len - 1; l > lstop ; l--) {
+                if(likely(value_string[l] == '0')) {
+                    value_string[l] = '\0';
+                    len--;
+                }
 
-            else if(unlikely(value_string[l] == '.')) {
-                value_string[l] = '\0';
-                len--;
-                break;
-            }
+                else if(unlikely(value_string[l] == '.')) {
+                    value_string[l] = '\0';
+                    len--;
+                    break;
+                }
 
-            else
-                break;
+                else
+                    break;
+            }
         }
 
         if(len >= 0)
diff --git a/src/web_client.c b/src/web_client.c
index 4036d4c81..0cf9eeb6a 100644
--- a/src/web_client.c
+++ b/src/web_client.c
@@ -407,6 +407,7 @@ int mysendfile(struct web_client *w, char *filename)
     buffer_flush(w->response.data);
     w->response.rlen = stat.st_size;
     w->response.data->date = stat.st_mtim.tv_sec;
+    buffer_cacheable(w->response.data);
 
     return 200;
 }
@@ -665,7 +666,7 @@ int web_client_api_request_v1_alarms(struct web_client *w, char *url)
     int all = 0;
 
     while(url) {
-        char *value = mystrsep(&url, "?&[]");
+        char *value = mystrsep(&url, "?&");
         if (!value || !*value) continue;
 
         if(!strcmp(value, "all")) all = 1;
@@ -680,17 +681,28 @@ int web_client_api_request_v1_alarms(struct web_client *w, char *url)
 
 int web_client_api_request_v1_alarm_log(struct web_client *w, char *url)
 {
-    (void)url;
+    uint32_t after = 0;
+
+    while(url) {
+        char *value = mystrsep(&url, "?&");
+        if (!value || !*value) continue;
+
+        char *name = mystrsep(&value, "=");
+        if(!name || !*name) continue;
+        if(!value || !*value) continue;
+
+        if(!strcmp(name, "after")) after = strtoul(value, NULL, 0);
+    }
 
     buffer_flush(w->response.data);
     w->response.data->contenttype = CT_APPLICATION_JSON;
-    health_alarm_log2json(&localhost, w->response.data);
+    health_alarm_log2json(&localhost, w->response.data, after);
     return 200;
 }
 
 int web_client_api_request_v1_charts(struct web_client *w, char *url)
 {
-    if(url) { ; }
+    (void)url;
 
     buffer_flush(w->response.data);
     w->response.data->contenttype = CT_APPLICATION_JSON;
@@ -706,7 +718,7 @@ int web_client_api_request_v1_chart(struct web_client *w, char *url)
     buffer_flush(w->response.data);
 
     while(url) {
-        char *value = mystrsep(&url, "?&[]");
+        char *value = mystrsep(&url, "?&");
         if(!value || !*value) continue;
 
         char *name = mystrsep(&value, "=");
@@ -768,7 +780,7 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
     uint32_t options = 0x00000000;
 
     while(url) {
-        char *value = mystrsep(&url, "/?&[]");
+        char *value = mystrsep(&url, "/?&");
         if(!value || !*value) continue;
 
         char *name = mystrsep(&value, "=");
@@ -809,6 +821,7 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
     }
 
     if(!chart || !*chart) {
+        buffer_no_cacheable(w->response.data);
         buffer_sprintf(w->response.data, "No chart id is given at the request.");
         goto cleanup;
     }
@@ -816,6 +829,7 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
     RRDSET *st = rrdset_find(chart);
     if(!st) st = rrdset_find_byname(chart);
     if(!st) {
+        buffer_no_cacheable(w->response.data);
         buffer_svg(w->response.data, "chart not found", 0, "", NULL, NULL, 1, -1);
         ret = 200;
         goto cleanup;
@@ -825,6 +839,7 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
     if(alarm) {
         rc = rrdcalc_find(st, alarm);
         if (!rc) {
+            buffer_no_cacheable(w->response.data);
             buffer_svg(w->response.data, "alarm not found", 0, "", NULL, NULL, 1, -1);
             ret = 200;
             goto cleanup;
@@ -848,7 +863,7 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
             else if(options & RRDR_OPTION_NOT_ALIGNED)
                 refresh = st->update_every;
             else {
-                refresh = (before - after);
+                refresh = (int)(before - after);
                 if(refresh < 0) refresh = -refresh;
             }
         }
@@ -904,8 +919,11 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
         calculated_number n = rc->value;
         if(isnan(n) || isinf(n)) n = 0;
 
-        if (refresh > 0)
+        if (refresh > 0) {
             buffer_sprintf(w->response.header, "Refresh: %d\r\n", refresh);
+            w->response.data->expires = time(NULL) + refresh;
+        }
+        else buffer_no_cacheable(w->response.data);
 
         if(!value_color) {
             switch(rc->status) {
@@ -935,7 +953,14 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
             }
         }
 
-        buffer_svg(w->response.data, label, rc->value * multiply / divide, units, label_color, value_color, 0, precision);
+        buffer_svg(w->response.data,
+                   label,
+                   rc->value * multiply / divide,
+                   units,
+                   label_color,
+                   value_color,
+                   0,
+                   precision);
         ret = 200;
     }
     else {
@@ -946,20 +971,40 @@ int web_client_api_request_v1_badge(struct web_client *w, char *url) {
 
         // if the collected value is too old, don't calculate its value
         if (rrdset_last_entry_t(st) >= (time(NULL) - (st->update_every * st->gap_when_lost_iterations_above)))
-            ret = rrd2value(st, w->response.data, &n, (dimensions) ? buffer_tostring(dimensions) : NULL, points, after,
-                            before, group, options, NULL, &latest_timestamp, &value_is_null);
+            ret = rrd2value(st,
+                            w->response.data,
+                            &n,
+                            (dimensions) ? buffer_tostring(dimensions) : NULL,
+                            points,
+                            after,
+                            before,
+                            group,
+                            options,
+                            NULL,
+                            &latest_timestamp,
+                            &value_is_null);
 
         // if the value cannot be calculated, show empty badge
         if (ret != 200) {
+            buffer_no_cacheable(w->response.data);
             value_is_null = 1;
             n = 0;
             ret = 200;
         }
-        else if (refresh > 0)
+        else if (refresh > 0) {
             buffer_sprintf(w->response.header, "Refresh: %d\r\n", refresh);
+            w->response.data->expires = time(NULL) + refresh;
+        }
+        else buffer_no_cacheable(w->response.data);
 
         // render the badge
-        buffer_svg(w->response.data, label, n * multiply / divide, units, label_color, value_color, value_is_null,
+        buffer_svg(w->response.data,
+                   label,
+                   n * multiply / divide,
+                   units,
+                   label_color,
+                   value_color,
+                   value_is_null,
                    precision);
     }
 
@@ -998,7 +1043,7 @@ int web_client_api_request_v1_data(struct web_client *w, char *url)
     uint32_t options = 0x00000000;
 
     while(url) {
-        char *value = mystrsep(&url, "?&[]");
+        char *value = mystrsep(&url, "?&");
         if(!value || !*value) continue;
 
         char *name = mystrsep(&value, "=");
@@ -1143,6 +1188,9 @@ cleanup:
     return ret;
 }
 
+
+#define REGISTRY_VERIFY_COOKIES_GUID "give-me-back-this-cookie-now--please"
+
 int web_client_api_request_v1_registry(struct web_client *w, char *url)
 {
     static uint32_t hash_action = 0, hash_access = 0, hash_hello = 0, hash_delete = 0, hash_search = 0,
@@ -1190,7 +1238,7 @@ int web_client_api_request_v1_registry(struct web_client *w, char *url)
 */
 
     while(url) {
-        char *value = mystrsep(&url, "?&[]");
+        char *value = mystrsep(&url, "?&");
         if (!value || !*value) continue;
 
         char *name = mystrsep(&value, "=");
@@ -1280,8 +1328,7 @@ int web_client_api_request_v1_registry(struct web_client *w, char *url)
             w->tracking_required = 1;
             if(registry_verify_cookies_redirects() > 0 && (!cookie || !person_guid[0])) {
                 buffer_flush(w->response.data);
-
-                registry_set_cookie(w, "give-me-back-this-cookie-please");
+                registry_set_cookie(w, REGISTRY_VERIFY_COOKIES_GUID);
                 w->response.data->contenttype = CT_APPLICATION_JSON;
                 buffer_sprintf(w->response.data, "{ \"status\": \"redirect\", \"registry\": \"%s\" }", registry_to_announce());
                 return 200;
@@ -1329,6 +1376,10 @@ int web_client_api_request_v1_registry(struct web_client *w, char *url)
                 return 307
 */
             }
+
+            if(unlikely(cookie && person_guid[0] && !strcmp(person_guid, REGISTRY_VERIFY_COOKIES_GUID)))
+                person_guid[0] = '\0';
+
             return registry_request_access_json(w, person_guid, machine_guid, machine_url, url_name, time(NULL));
 
         case 'D':
@@ -1852,8 +1903,18 @@ static inline int http_request_validate(struct web_client *w) {
 }
 
 void web_client_process(struct web_client *w) {
-    static uint32_t hash_api = 0, hash_netdata_conf = 0, hash_data = 0, hash_datasource = 0, hash_graph = 0,
-            hash_list = 0, hash_all_json = 0, hash_exit = 0, hash_debug = 0, hash_mirror = 0;
+    static uint32_t
+            hash_api = 0,
+            hash_netdata_conf = 0,
+            hash_data = 0,
+            hash_datasource = 0,
+            hash_graph = 0,
+            hash_list = 0,
+            hash_all_json = 0;
+
+#ifdef NETDATA_INTERNAL_CHECKS
+    static uint32_t hash_exit = 0, hash_debug = 0, hash_mirror = 0;
+#endif
 
     // start timing us
     gettimeofday(&w->tv_in, NULL);
@@ -1866,9 +1927,11 @@ void web_client_process(struct web_client *w) {
         hash_graph = simple_hash(WEB_PATH_GRAPH);
         hash_list = simple_hash("list");
         hash_all_json = simple_hash("all.json");
+#ifdef NETDATA_INTERNAL_CHECKS
         hash_exit = simple_hash("exit");
         hash_debug = simple_hash("debug");
         hash_mirror = simple_hash("mirror");
+#endif
     }
 
     int code = 500;
@@ -2065,19 +2128,41 @@ void web_client_process(struct web_client *w) {
     }
 
     gettimeofday(&w->tv_ready, NULL);
-    w->response.data->date = time(NULL);
     w->response.sent = 0;
     w->response.code = code;
 
+    // set a proper last modified date
+    if(unlikely(!w->response.data->date))
+        w->response.data->date = w->tv_ready.tv_sec;
+
+    if(unlikely(code != 200))
+        buffer_no_cacheable(w->response.data);
+
+    // set a proper expiration date, if not already set
+    if(unlikely(!w->response.data->expires)) {
+        if(w->response.data->options & WB_CONTENT_NO_CACHEABLE)
+            w->response.data->expires = w->tv_ready.tv_sec + rrd_update_every;
+        else
+            w->response.data->expires = w->tv_ready.tv_sec + 86400;
+    }
+
     // prepare the HTTP response header
     debug(D_WEB_CLIENT, "%llu: Generating HTTP header with response %d.", w->id, code);
 
     const char *content_type_string = web_content_type_to_string(w->response.data->contenttype);
     const char *code_msg = web_response_code_to_string(code);
 
-    char date[32];
-    struct tm tmbuf, *tm = gmtime_r(&w->response.data->date, &tmbuf);
-    strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %Z", tm);
+    // prepare the last modified and expiration dates
+    char date[32], edate[32];
+    {
+        struct tm tmbuf, *tm;
+
+        tm = gmtime_r(&w->response.data->date, &tmbuf);
+        strftime(date, sizeof(date), "%a, %d %b %Y %H:%M:%S %Z", tm);
+
+        tm = gmtime_r(&w->response.data->expires, &tmbuf);
+        strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", tm);
+    }
 
     buffer_sprintf(w->response.header_output,
         "HTTP/1.1 %d %s\r\n"
@@ -2129,44 +2214,37 @@ void web_client_process(struct web_client *w) {
             "Access-Control-Max-Age: 1209600\r\n" // 86400 * 14
             );
     }
-
-    if(buffer_strlen(w->response.header))
-        buffer_strcat(w->response.header_output, buffer_tostring(w->response.header));
-
-    if(w->mode == WEB_CLIENT_MODE_NORMAL && (w->response.data->options & WB_CONTENT_NO_CACHEABLE)) {
-        buffer_sprintf(w->response.header_output,
-            "Expires: %s\r\n"
-            "Cache-Control: no-cache\r\n"
-            , date);
-    }
-    else if(w->mode != WEB_CLIENT_MODE_OPTIONS) {
-        char edate[32];
-        time_t et = w->response.data->date + (86400 * 14);
-        struct tm etmbuf, *etm = gmtime_r(&et, &etmbuf);
-        strftime(edate, sizeof(edate), "%a, %d %b %Y %H:%M:%S %Z", etm);
-
+    else {
         buffer_sprintf(w->response.header_output,
-            "Expires: %s\r\n"
-            "Cache-Control: public\r\n"
-            , edate);
+            "Cache-Control: %s\r\n"
+            "Expires: %s\r\n",
+            (w->response.data->options & WB_CONTENT_NO_CACHEABLE)?"no-cache":"public",
+            edate);
     }
 
-    // if we know the content length, put it
-    if(!w->response.zoutput && (w->response.data->len || w->response.rlen))
-        buffer_sprintf(w->response.header_output,
-            "Content-Length: %zu\r\n"
-            , w->response.data->len? w->response.data->len: w->response.rlen
-            );
-    else if(!w->response.zoutput)
-        w->keepalive = 0;   // content-length is required for keep-alive
+    // copy a possibly available custom header
+    if(unlikely(buffer_strlen(w->response.header)))
+        buffer_strcat(w->response.header_output, buffer_tostring(w->response.header));
 
-    if(w->response.zoutput) {
+    // headers related to the transfer method
+    if(likely(w->response.zoutput)) {
         buffer_strcat(w->response.header_output,
             "Content-Encoding: gzip\r\n"
             "Transfer-Encoding: chunked\r\n"
             );
     }
+    else {
+        if(likely((w->response.data->len || w->response.rlen))) {
+            // we know the content length, put it
+            buffer_sprintf(w->response.header_output, "Content-Length: %zu\r\n", w->response.data->len? w->response.data->len: w->response.rlen);
+        }
+        else {
+            // we don't know the content length, disable keep-alive
+            w->keepalive = 0;
+        }
+    }
 
+    // end of HTTP header
     buffer_strcat(w->response.header_output, "\r\n");
 
     // sent the HTTP header
diff --git a/src/web_server.c b/src/web_server.c
index cf3687f3e..cbbe6bb40 100644
--- a/src/web_server.c
+++ b/src/web_server.c
@@ -10,21 +10,39 @@ int web_server_mode = WEB_SERVER_MODE_MULTI_THREADED;
 #ifdef NETDATA_INTERNAL_CHECKS
 static void log_allocations(void)
 {
-    static int mem = 0;
+#ifdef HAVE_C_MALLINFO
+    static int heap = 0, used = 0, mmap = 0;
 
     struct mallinfo mi;
 
     mi = mallinfo();
-    if(mi.uordblks > mem) {
+    if(mi.uordblks > used) {
         int clients = 0;
         struct web_client *w;
         for(w = web_clients; w ; w = w->next) clients++;
 
-        info("Allocated memory increased from %d to %d (increased by %d bytes). There are %d web clients connected.", mem, mi.uordblks, mi.uordblks - mem, clients);
-        mem = mi.uordblks;
+        info("Allocated memory: used %d KB (+%d B), mmap %d KB (+%d B), heap %d KB (+%d B). %d web clients connected.",
+            mi.uordblks / 1024,
+            mi.uordblks - used,
+            mi.hblkhd / 1024,
+            mi.hblkhd - mmap,
+            mi.arena / 1024,
+            mi.arena - heap,
+            clients);
+
+        used = mi.uordblks;
+        heap = mi.arena;
+        mmap = mi.hblkhd;
     }
-}
+#else /* ! HAVE_C_MALLINFO */
+    ;
+#endif /* ! HAVE_C_MALLINFO */
+
+#ifdef has_jemalloc
+    malloc_stats_print(NULL, NULL, NULL);
 #endif
+}
+#endif /* NETDATA_INTERNAL_CHECKS */
 
 #ifndef HAVE_ACCEPT4
 int accept4(int sock, struct sockaddr *addr, socklen_t *addrlen, int flags) {
@@ -38,10 +56,14 @@ int accept4(int sock, struct sockaddr *addr, socklen_t *addrlen, int flags) {
         flags &= ~SOCK_NONBLOCK;
     }
 
+#ifdef SOCK_CLOEXEC
+#ifdef O_CLOEXEC
     if (flags & SOCK_CLOEXEC) {
         newflags |= O_CLOEXEC;
         flags &= ~SOCK_CLOEXEC;
     }
+#endif
+#endif
 
     if (flags) {
         errno = -EINVAL;