New upstream version 1.8.0+dfsgupstream/1.8.0+dfsg

65 files changed, 3480 insertions, 1225 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 601d3204..feddc326 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -37,6 +37,10 @@ if ENABLE_PLUGIN_FREEIPMI
 plugins_PROGRAMS += freeipmi.plugin
 endif
 
+if ENABLE_PLUGIN_CGROUP_NETWORK
+plugins_PROGRAMS += cgroup-network
+endif
+
 netdata_SOURCES = \
 	adaptive_resortable_list.c \
 	adaptive_resortable_list.h \
@@ -117,6 +121,8 @@ netdata_SOURCES = \
 	rrdset.c \
 	rrdsetvar.c \
 	rrdvar.c \
+	signals.c \
+	signals.h \
 	simple_pattern.c \
 	simple_pattern.h \
 	socket.c \
@@ -129,7 +135,6 @@ netdata_SOURCES = \
 	storage_number.h \
 	sys_devices_system_edac_mc.c \
 	sys_devices_system_node.c \
-	sys_fs_cgroup.c \
 	unit_test.c \
 	unit_test.h \
 	url.c url.h \
@@ -199,6 +204,7 @@ netdata_SOURCES += \
 	proc_vmstat.c \
 	proc_uptime.c \
 	sys_kernel_mm_ksm.c \
+	sys_fs_cgroup.c \
 	$(NULL)
 endif
 endif
@@ -244,3 +250,17 @@ freeipmi_plugin_SOURCES = \
 freeipmi_plugin_LDADD = \
 	$(OPTIONAL_IPMIMONITORING_LIBS) \
 	$(NULL)
+
+cgroup_network_SOURCES = \
+    cgroup-network.c \
+	clocks.c clocks.h \
+    common.c common.h \
+    inlined.h \
+    log.c log.h \
+	procfile.c procfile.h \
+    $(NULL)
+
+cgroup_network_LDADD = \
+	$(OPTIONAL_MATH_LIBS) \
+	$(OPTIONAL_LIBCAP_LIBS) \
+	$(NULL)
diff --git a/src/Makefile.in b/src/Makefile.in
index 3ce869b0..bc73c712 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -80,10 +80,11 @@ POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
 sbin_PROGRAMS = netdata$(EXEEXT)
-plugins_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2)
+plugins_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2) $(am__EXEEXT_3)
 @ENABLE_PLUGIN_APPS_TRUE@am__append_1 = apps.plugin
 @ENABLE_PLUGIN_FREEIPMI_TRUE@am__append_2 = freeipmi.plugin
-@FREEBSD_TRUE@am__append_3 = \
+@ENABLE_PLUGIN_CGROUP_NETWORK_TRUE@am__append_3 = cgroup-network
+@FREEBSD_TRUE@am__append_4 = \
 @FREEBSD_TRUE@	plugin_freebsd.c \
 @FREEBSD_TRUE@	plugin_freebsd.h \
 @FREEBSD_TRUE@	freebsd_sysctl.c \
@@ -96,7 +97,7 @@ plugins_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2)
 @FREEBSD_TRUE@	freebsd_ipfw.c \
 @FREEBSD_TRUE@	$(NULL)
 
-@FREEBSD_FALSE@@MACOS_TRUE@am__append_4 = \
+@FREEBSD_FALSE@@MACOS_TRUE@am__append_5 = \
 @FREEBSD_FALSE@@MACOS_TRUE@	plugin_macos.c \
 @FREEBSD_FALSE@@MACOS_TRUE@	plugin_macos.h \
 @FREEBSD_FALSE@@MACOS_TRUE@	macos_sysctl.c \
@@ -104,7 +105,7 @@ plugins_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2)
 @FREEBSD_FALSE@@MACOS_TRUE@	macos_fw.c \
 @FREEBSD_FALSE@@MACOS_TRUE@	$(NULL)
 
-@FREEBSD_FALSE@@MACOS_FALSE@am__append_5 = \
+@FREEBSD_FALSE@@MACOS_FALSE@am__append_6 = \
 @FREEBSD_FALSE@@MACOS_FALSE@	ipc.c ipc.h \
 @FREEBSD_FALSE@@MACOS_FALSE@	plugin_proc.c \
 @FREEBSD_FALSE@@MACOS_FALSE@	plugin_proc.h \
@@ -133,9 +134,10 @@ plugins_PROGRAMS = $(am__EXEEXT_1) $(am__EXEEXT_2)
 @FREEBSD_FALSE@@MACOS_FALSE@	proc_vmstat.c \
 @FREEBSD_FALSE@@MACOS_FALSE@	proc_uptime.c \
 @FREEBSD_FALSE@@MACOS_FALSE@	sys_kernel_mm_ksm.c \
+@FREEBSD_FALSE@@MACOS_FALSE@	sys_fs_cgroup.c \
 @FREEBSD_FALSE@@MACOS_FALSE@	$(NULL)
 
-@FREEBSD_TRUE@am__append_6 = \
+@FREEBSD_TRUE@am__append_7 = \
 @FREEBSD_TRUE@	plugin_freebsd.h \
 @FREEBSD_TRUE@	$(NULL)
 
@@ -160,6 +162,8 @@ CONFIG_CLEAN_FILES =
 CONFIG_CLEAN_VPATH_FILES =
 @ENABLE_PLUGIN_APPS_TRUE@am__EXEEXT_1 = apps.plugin$(EXEEXT)
 @ENABLE_PLUGIN_FREEIPMI_TRUE@am__EXEEXT_2 = freeipmi.plugin$(EXEEXT)
+@ENABLE_PLUGIN_CGROUP_NETWORK_TRUE@am__EXEEXT_3 =  \
+@ENABLE_PLUGIN_CGROUP_NETWORK_TRUE@	cgroup-network$(EXEEXT)
 am__installdirs = "$(DESTDIR)$(pluginsdir)" "$(DESTDIR)$(sbindir)" \
 	"$(DESTDIR)$(cachedir)" "$(DESTDIR)$(logdir)" \
 	"$(DESTDIR)$(registrydir)" "$(DESTDIR)$(varlibdir)"
@@ -174,6 +178,11 @@ am_apps_plugin_OBJECTS = apps_plugin.$(OBJEXT) avl.$(OBJEXT) \
 apps_plugin_OBJECTS = $(am_apps_plugin_OBJECTS)
 am__DEPENDENCIES_1 =
 apps_plugin_DEPENDENCIES = $(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
+am_cgroup_network_OBJECTS = cgroup-network.$(OBJEXT) clocks.$(OBJEXT) \
+	common.$(OBJEXT) log.$(OBJEXT) procfile.$(OBJEXT)
+cgroup_network_OBJECTS = $(am_cgroup_network_OBJECTS)
+cgroup_network_DEPENDENCIES = $(am__DEPENDENCIES_1) \
+	$(am__DEPENDENCIES_1)
 am_freeipmi_plugin_OBJECTS = freeipmi_plugin.$(OBJEXT) \
 	clocks.$(OBJEXT) common.$(OBJEXT) log.$(OBJEXT) \
 	procfile.$(OBJEXT)
@@ -197,20 +206,19 @@ am__netdata_SOURCES_DIST = adaptive_resortable_list.c \
 	registry_url.c registry_url.h rrd.c rrd.h rrd2json.c \
 	rrd2json.h rrd2json_api_old.c rrd2json_api_old.h rrdcalc.c \
 	rrdcalctemplate.c rrddim.c rrddimvar.c rrdfamily.c rrdhost.c \
-	rrdpush.c rrdpush.h rrdset.c rrdsetvar.c rrdvar.c \
-	simple_pattern.c simple_pattern.h socket.c socket.h \
+	rrdpush.c rrdpush.h rrdset.c rrdsetvar.c rrdvar.c signals.c \
+	signals.h simple_pattern.c simple_pattern.h socket.c socket.h \
 	statistical.c statistical.h statsd.c statsd.h storage_number.c \
 	storage_number.h sys_devices_system_edac_mc.c \
-	sys_devices_system_node.c sys_fs_cgroup.c unit_test.c \
-	unit_test.h url.c url.h web_api_old.c web_api_old.h \
-	web_api_v1.c web_api_v1.h web_buffer.c web_buffer.h \
-	web_buffer_svg.c web_buffer_svg.h web_client.c web_client.h \
-	web_server.c web_server.h plugin_freebsd.c plugin_freebsd.h \
-	freebsd_sysctl.c freebsd_getmntinfo.c freebsd_getifaddrs.c \
-	freebsd_devstat.c zfs_common.c zfs_common.h \
-	freebsd_kstat_zfs.c freebsd_ipfw.c plugin_macos.c \
-	plugin_macos.h macos_sysctl.c macos_mach_smi.c macos_fw.c \
-	ipc.c ipc.h plugin_proc.c plugin_proc.h \
+	sys_devices_system_node.c unit_test.c unit_test.h url.c url.h \
+	web_api_old.c web_api_old.h web_api_v1.c web_api_v1.h \
+	web_buffer.c web_buffer.h web_buffer_svg.c web_buffer_svg.h \
+	web_client.c web_client.h web_server.c web_server.h \
+	plugin_freebsd.c plugin_freebsd.h freebsd_sysctl.c \
+	freebsd_getmntinfo.c freebsd_getifaddrs.c freebsd_devstat.c \
+	zfs_common.c zfs_common.h freebsd_kstat_zfs.c freebsd_ipfw.c \
+	plugin_macos.c plugin_macos.h macos_sysctl.c macos_mach_smi.c \
+	macos_fw.c ipc.c ipc.h plugin_proc.c plugin_proc.h \
 	plugin_proc_diskspace.c plugin_proc_diskspace.h \
 	proc_diskstats.c proc_interrupts.c proc_softirqs.c \
 	proc_loadavg.c proc_meminfo.c proc_net_dev.c \
@@ -219,7 +227,7 @@ am__netdata_SOURCES_DIST = adaptive_resortable_list.c \
 	proc_net_softnet_stat.c proc_net_stat_conntrack.c \
 	proc_net_stat_synproxy.c proc_spl_kstat_zfs.c proc_stat.c \
 	proc_sys_kernel_random_entropy_avail.c proc_vmstat.c \
-	proc_uptime.c sys_kernel_mm_ksm.c
+	proc_uptime.c sys_kernel_mm_ksm.c sys_fs_cgroup.c
 @FREEBSD_TRUE@am__objects_2 = plugin_freebsd.$(OBJEXT) \
 @FREEBSD_TRUE@	freebsd_sysctl.$(OBJEXT) \
 @FREEBSD_TRUE@	freebsd_getmntinfo.$(OBJEXT) \
@@ -255,7 +263,8 @@ am__netdata_SOURCES_DIST = adaptive_resortable_list.c \
 @FREEBSD_FALSE@@MACOS_FALSE@	proc_sys_kernel_random_entropy_avail.$(OBJEXT) \
 @FREEBSD_FALSE@@MACOS_FALSE@	proc_vmstat.$(OBJEXT) \
 @FREEBSD_FALSE@@MACOS_FALSE@	proc_uptime.$(OBJEXT) \
-@FREEBSD_FALSE@@MACOS_FALSE@	sys_kernel_mm_ksm.$(OBJEXT)
+@FREEBSD_FALSE@@MACOS_FALSE@	sys_kernel_mm_ksm.$(OBJEXT) \
+@FREEBSD_FALSE@@MACOS_FALSE@	sys_fs_cgroup.$(OBJEXT)
 am_netdata_OBJECTS = adaptive_resortable_list.$(OBJEXT) \
 	appconfig.$(OBJEXT) avl.$(OBJEXT) backend_prometheus.$(OBJEXT) \
 	backends.$(OBJEXT) clocks.$(OBJEXT) common.$(OBJEXT) \
@@ -275,15 +284,14 @@ am_netdata_OBJECTS = adaptive_resortable_list.$(OBJEXT) \
 	rrdcalc.$(OBJEXT) rrdcalctemplate.$(OBJEXT) rrddim.$(OBJEXT) \
 	rrddimvar.$(OBJEXT) rrdfamily.$(OBJEXT) rrdhost.$(OBJEXT) \
 	rrdpush.$(OBJEXT) rrdset.$(OBJEXT) rrdsetvar.$(OBJEXT) \
-	rrdvar.$(OBJEXT) simple_pattern.$(OBJEXT) socket.$(OBJEXT) \
-	statistical.$(OBJEXT) statsd.$(OBJEXT) \
+	rrdvar.$(OBJEXT) signals.$(OBJEXT) simple_pattern.$(OBJEXT) \
+	socket.$(OBJEXT) statistical.$(OBJEXT) statsd.$(OBJEXT) \
 	storage_number.$(OBJEXT) sys_devices_system_edac_mc.$(OBJEXT) \
-	sys_devices_system_node.$(OBJEXT) sys_fs_cgroup.$(OBJEXT) \
-	unit_test.$(OBJEXT) url.$(OBJEXT) web_api_old.$(OBJEXT) \
-	web_api_v1.$(OBJEXT) web_buffer.$(OBJEXT) \
-	web_buffer_svg.$(OBJEXT) web_client.$(OBJEXT) \
-	web_server.$(OBJEXT) $(am__objects_2) $(am__objects_3) \
-	$(am__objects_4)
+	sys_devices_system_node.$(OBJEXT) unit_test.$(OBJEXT) \
+	url.$(OBJEXT) web_api_old.$(OBJEXT) web_api_v1.$(OBJEXT) \
+	web_buffer.$(OBJEXT) web_buffer_svg.$(OBJEXT) \
+	web_client.$(OBJEXT) web_server.$(OBJEXT) $(am__objects_2) \
+	$(am__objects_3) $(am__objects_4)
 netdata_OBJECTS = $(am_netdata_OBJECTS)
 netdata_DEPENDENCIES = $(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1) \
 	$(am__DEPENDENCIES_1) $(am__DEPENDENCIES_1)
@@ -315,10 +323,11 @@ AM_V_CCLD = $(am__v_CCLD_@AM_V@)
 am__v_CCLD_ = $(am__v_CCLD_@AM_DEFAULT_V@)
 am__v_CCLD_0 = @echo "  CCLD    " $@;
 am__v_CCLD_1 = 
-SOURCES = $(apps_plugin_SOURCES) $(freeipmi_plugin_SOURCES) \
-	$(netdata_SOURCES)
+SOURCES = $(apps_plugin_SOURCES) $(cgroup_network_SOURCES) \
+	$(freeipmi_plugin_SOURCES) $(netdata_SOURCES)
 DIST_SOURCES = $(am__apps_plugin_SOURCES_DIST) \
-	$(freeipmi_plugin_SOURCES) $(am__netdata_SOURCES_DIST)
+	$(cgroup_network_SOURCES) $(freeipmi_plugin_SOURCES) \
+	$(am__netdata_SOURCES_DIST)
 am__can_run_installinfo = \
   case $$AM_UPDATE_INFO_DIR in \
     n|no|NO) false;; \
@@ -563,16 +572,15 @@ netdata_SOURCES = adaptive_resortable_list.c \
 	registry_url.c registry_url.h rrd.c rrd.h rrd2json.c \
 	rrd2json.h rrd2json_api_old.c rrd2json_api_old.h rrdcalc.c \
 	rrdcalctemplate.c rrddim.c rrddimvar.c rrdfamily.c rrdhost.c \
-	rrdpush.c rrdpush.h rrdset.c rrdsetvar.c rrdvar.c \
-	simple_pattern.c simple_pattern.h socket.c socket.h \
+	rrdpush.c rrdpush.h rrdset.c rrdsetvar.c rrdvar.c signals.c \
+	signals.h simple_pattern.c simple_pattern.h socket.c socket.h \
 	statistical.c statistical.h statsd.c statsd.h storage_number.c \
 	storage_number.h sys_devices_system_edac_mc.c \
-	sys_devices_system_node.c sys_fs_cgroup.c unit_test.c \
-	unit_test.h url.c url.h web_api_old.c web_api_old.h \
-	web_api_v1.c web_api_v1.h web_buffer.c web_buffer.h \
-	web_buffer_svg.c web_buffer_svg.h web_client.c web_client.h \
-	web_server.c web_server.h $(NULL) $(am__append_3) \
-	$(am__append_4) $(am__append_5)
+	sys_devices_system_node.c unit_test.c unit_test.h url.c url.h \
+	web_api_old.c web_api_old.h web_api_v1.c web_api_v1.h \
+	web_buffer.c web_buffer.h web_buffer_svg.c web_buffer_svg.h \
+	web_client.c web_client.h web_server.c web_server.h $(NULL) \
+	$(am__append_4) $(am__append_5) $(am__append_6)
 netdata_LDADD = \
 	$(OPTIONAL_MATH_LIBS) \
 	$(OPTIONAL_NFACCT_LIBS) \
@@ -582,7 +590,7 @@ netdata_LDADD = \
 
 apps_plugin_SOURCES = apps_plugin.c avl.c avl.h clocks.c clocks.h \
 	common.c common.h inlined.h log.c log.h procfile.c procfile.h \
-	web_buffer.c web_buffer.h $(NULL) $(am__append_6)
+	web_buffer.c web_buffer.h $(NULL) $(am__append_7)
 apps_plugin_LDADD = \
 	$(OPTIONAL_MATH_LIBS) \
 	$(OPTIONAL_LIBCAP_LIBS) \
@@ -601,6 +609,20 @@ freeipmi_plugin_LDADD = \
 	$(OPTIONAL_IPMIMONITORING_LIBS) \
 	$(NULL)
 
+cgroup_network_SOURCES = \
+    cgroup-network.c \
+	clocks.c clocks.h \
+    common.c common.h \
+    inlined.h \
+    log.c log.h \
+	procfile.c procfile.h \
+    $(NULL)
+
+cgroup_network_LDADD = \
+	$(OPTIONAL_MATH_LIBS) \
+	$(OPTIONAL_LIBCAP_LIBS) \
+	$(NULL)
+
 all: all-am
 
 .SUFFIXES:
@@ -724,6 +746,10 @@ apps.plugin$(EXEEXT): $(apps_plugin_OBJECTS) $(apps_plugin_DEPENDENCIES) $(EXTRA
 	@rm -f apps.plugin$(EXEEXT)
 	$(AM_V_CCLD)$(LINK) $(apps_plugin_OBJECTS) $(apps_plugin_LDADD) $(LIBS)
 
+cgroup-network$(EXEEXT): $(cgroup_network_OBJECTS) $(cgroup_network_DEPENDENCIES) $(EXTRA_cgroup_network_DEPENDENCIES) 
+	@rm -f cgroup-network$(EXEEXT)
+	$(AM_V_CCLD)$(LINK) $(cgroup_network_OBJECTS) $(cgroup_network_LDADD) $(LIBS)
+
 freeipmi.plugin$(EXEEXT): $(freeipmi_plugin_OBJECTS) $(freeipmi_plugin_DEPENDENCIES) $(EXTRA_freeipmi_plugin_DEPENDENCIES) 
 	@rm -f freeipmi.plugin$(EXEEXT)
 	$(AM_V_CCLD)$(LINK) $(freeipmi_plugin_OBJECTS) $(freeipmi_plugin_LDADD) $(LIBS)
@@ -744,6 +770,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/avl.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/backend_prometheus.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/backends.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cgroup-network.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/clocks.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/common.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/daemon.Po@am__quote@
@@ -820,6 +847,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rrdset.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rrdsetvar.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rrdvar.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/signals.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/simple_pattern.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/socket.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/statistical.Po@am__quote@
diff --git a/src/appconfig.c b/src/appconfig.c
index 91c4c5c5..2c7721b8 100644
--- a/src/appconfig.c
+++ b/src/appconfig.c
@@ -317,7 +317,7 @@ int appconfig_get_boolean(struct config *root, const char *section, const char *
     s = appconfig_get(root, section, name, s);
     if(!s) return value;
 
-    if(!strcmp(s, "yes") || !strcmp(s, "auto") || !strcmp(s, "on demand")) return 1;
+    if(!strcasecmp(s, "yes") || !strcasecmp(s, "true") || !strcasecmp(s, "on") || !strcasecmp(s, "auto") || !strcasecmp(s, "on demand")) return 1;
     return 0;
 }
 
diff --git a/src/apps_plugin.c b/src/apps_plugin.c
index ecb6aaea..c0eb5c08 100644
--- a/src/apps_plugin.c
+++ b/src/apps_plugin.c
@@ -3197,7 +3197,7 @@ static void parse_args(int argc, char **argv)
             }
         }
 
-        if(strcmp("version", argv[i]) == 0 || strcmp("-v", argv[i]) == 0 || strcmp("-V", argv[i]) == 0) {
+        if(strcmp("version", argv[i]) == 0 || strcmp("-version", argv[i]) == 0 || strcmp("--version", argv[i]) == 0 || strcmp("-v", argv[i]) == 0 || strcmp("-V", argv[i]) == 0) {
             printf("apps.plugin %s\n", VERSION);
             exit(0);
         }
diff --git a/src/cgroup-network.c b/src/cgroup-network.c
new file mode 100644
index 00000000..8894d60e
--- /dev/null
+++ b/src/cgroup-network.c
@@ -0,0 +1,340 @@
+#include "common.h"
+
+#ifdef HAVE_SETNS
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE             /* See feature_test_macros(7) */
+#endif
+#include <sched.h>
+#endif
+
+// ----------------------------------------------------------------------------
+// callback required by fatal()
+
+void netdata_cleanup_and_exit(int ret) {
+    exit(ret);
+}
+
+struct iface {
+    const char *device;
+    uint32_t hash;
+
+    unsigned int ifindex;
+    unsigned int iflink;
+
+    struct iface *next;
+};
+
+unsigned int read_iface_iflink(const char *prefix, const char *iface) {
+    char filename[FILENAME_MAX + 1];
+    snprintfz(filename, FILENAME_MAX, "%s/sys/class/net/%s/iflink", prefix?prefix:"", iface);
+
+    unsigned long long iflink = 0;
+    int ret = read_single_number_file(filename, &iflink);
+    if(ret) error("Cannot read '%s'.", filename);
+
+    return (unsigned int)iflink;
+}
+
+unsigned int read_iface_ifindex(const char *prefix, const char *iface) {
+    char filename[FILENAME_MAX + 1];
+    snprintfz(filename, FILENAME_MAX, "%s/sys/class/net/%s/ifindex", prefix?prefix:"", iface);
+
+    unsigned long long ifindex = 0;
+    int ret = read_single_number_file(filename, &ifindex);
+    if(ret) error("Cannot read '%s'.", filename);
+
+    return (unsigned int)ifindex;
+}
+
+struct iface *read_proc_net_dev(const char *prefix) {
+    procfile *ff = NULL;
+    char filename[FILENAME_MAX + 1];
+
+    snprintfz(filename, FILENAME_MAX, "%s%s", prefix?prefix:"", "/proc/net/dev");
+    ff = procfile_open(filename, " \t,:|", PROCFILE_FLAG_DEFAULT);
+    if(unlikely(!ff)) {
+        error("Cannot open file '%s'", filename);
+        return NULL;
+    }
+
+    ff = procfile_readall(ff);
+    if(unlikely(!ff)) {
+        error("Cannot read file '%s'", filename);
+        return NULL;
+    }
+
+    size_t lines = procfile_lines(ff), l;
+    struct iface *root = NULL;
+    for(l = 2; l < lines ;l++) {
+        if (unlikely(procfile_linewords(ff, l) < 1)) continue;
+
+        struct iface *t = callocz(1, sizeof(struct iface));
+        t->device = strdupz(procfile_lineword(ff, l, 0));
+        t->hash = simple_hash(t->device);
+        t->ifindex = read_iface_ifindex(prefix, t->device);
+        t->iflink  = read_iface_iflink(prefix, t->device);
+        t->next = root;
+        root = t;
+    }
+
+    procfile_close(ff);
+
+    return root;
+}
+
+int iface_is_eligible(struct iface *iface) {
+    if(iface->iflink != iface->ifindex)
+        return 1;
+
+    return 0;
+}
+
+int eligible_ifaces(struct iface *root) {
+    int eligible = 0;
+
+    struct iface *t;
+    for(t = root; t ; t = t->next)
+        if(iface_is_eligible(t))
+            eligible++;
+
+    return eligible;
+}
+
+static void continue_as_child(void) {
+    pid_t child = fork();
+    int status;
+    pid_t ret;
+
+    if (child < 0)
+        error("fork() failed");
+
+    /* Only the child returns */
+    if (child == 0)
+        return;
+
+    for (;;) {
+        ret = waitpid(child, &status, WUNTRACED);
+        if ((ret == child) && (WIFSTOPPED(status))) {
+            /* The child suspended so suspend us as well */
+            kill(getpid(), SIGSTOP);
+            kill(child, SIGCONT);
+        } else {
+            break;
+        }
+    }
+
+    /* Return the child's exit code if possible */
+    if (WIFEXITED(status)) {
+        exit(WEXITSTATUS(status));
+    } else if (WIFSIGNALED(status)) {
+        kill(getpid(), WTERMSIG(status));
+    }
+
+    exit(EXIT_FAILURE);
+}
+
+int proc_pid_fd(const char *prefix, const char *ns, pid_t pid) {
+    char filename[FILENAME_MAX + 1];
+    snprintfz(filename, FILENAME_MAX, "%s/proc/%d/%s", prefix?prefix:"", (int)pid, ns);
+    int fd = open(filename, O_RDONLY);
+
+    if(fd == -1)
+        error("Cannot open file '%s'", filename);
+
+    return fd;
+}
+
+static struct ns {
+    int nstype;
+    int fd;
+    int status;
+    const char *name;
+    const char *path;
+} all_ns[] = {
+        // { .nstype = CLONE_NEWUSER,   .fd = -1, .status = -1, .name = "user",    .path = "ns/user"   },
+        // { .nstype = CLONE_NEWCGROUP, .fd = -1, .status = -1, .name = "cgroup",  .path = "ns/cgroup" },
+        // { .nstype = CLONE_NEWIPC,    .fd = -1, .status = -1, .name = "ipc",     .path = "ns/ipc"    },
+        // { .nstype = CLONE_NEWUTS,    .fd = -1, .status = -1, .name = "uts",     .path = "ns/uts"    },
+        { .nstype = CLONE_NEWNET,    .fd = -1, .status = -1, .name = "network", .path = "ns/net"    },
+        { .nstype = CLONE_NEWPID,    .fd = -1, .status = -1, .name = "pid",     .path = "ns/pid"    },
+        { .nstype = CLONE_NEWNS,     .fd = -1, .status = -1, .name = "mount",   .path = "ns/mnt"    },
+
+        // terminator
+        { .nstype = 0,               .fd = -1, .status = -1, .name = NULL,      .path = NULL        }
+};
+
+int switch_namespace(const char *prefix, pid_t pid) {
+#ifdef HAVE_SETNS
+
+    int i;
+    for(i = 0; all_ns[i].name ; i++)
+        all_ns[i].fd = proc_pid_fd(prefix, all_ns[i].path, pid);
+
+    int root_fd = proc_pid_fd(prefix, "root", pid);
+    int cwd_fd  = proc_pid_fd(prefix, "cwd", pid);
+
+    setgroups(0, NULL);
+
+    // 2 passes - found it at nsenter source code
+    // this is related CLONE_NEWUSER functionality
+
+    // FIXME: this code cannot switch user namespace
+    // Fortunately, we don't need it.
+
+    int pass, errors = 0;
+    for(pass = 0; pass < 2 ;pass++) {
+        for(i = 0; all_ns[i].name ; i++) {
+            if (all_ns[i].fd != -1 && all_ns[i].status == -1) {
+                if(setns(all_ns[i].fd, all_ns[i].nstype) == -1) {
+                    if(pass == 1) {
+                        all_ns[i].status = 0;
+                        error("Cannot switch to %s namespace of pid %d", all_ns[i].name, (int) pid);
+                        errors++;
+                    }
+                }
+                else
+                    all_ns[i].status = 1;
+            }
+        }
+    }
+
+    setgroups(0, NULL);
+
+    if(root_fd != -1) {
+        if(fchdir(root_fd) < 0)
+            error("Cannot fchdir() to pid %d root directory", (int)pid);
+
+        if(chroot(".") < 0)
+            error("Cannot chroot() to pid %d root directory", (int)pid);
+
+        close(root_fd);
+    }
+
+    if(cwd_fd != -1) {
+        if(fchdir(cwd_fd) < 0)
+            error("Cannot fchdir() to pid %d current working directory", (int)pid);
+
+        close(cwd_fd);
+    }
+
+    int do_fork = 0;
+    for(i = 0; all_ns[i].name ; i++)
+        if(all_ns[i].fd != -1) {
+
+            // CLONE_NEWPID requires a fork() to become effective
+            if(all_ns[i].nstype == CLONE_NEWPID && all_ns[i].status)
+                do_fork = 1;
+
+            close(all_ns[i].fd);
+        }
+
+    if(do_fork)
+        continue_as_child();
+
+    return 0;
+
+#else
+
+    errno = ENOSYS;
+    error("setns() is missing on this system.");
+    return 1;
+
+#endif
+}
+
+pid_t read_pid_from_cgroup(const char *path) {
+    char buffer[FILENAME_MAX + 1];
+
+    snprintfz(buffer, FILENAME_MAX, "%s/cgroup.procs", path);
+    FILE *fp = fopen(buffer, "r");
+    if(!fp) {
+        error("Cannot read file '%s'.", buffer);
+        snprintfz(buffer, FILENAME_MAX, "%s/tasks", path);
+        fp = fopen(buffer, "r");
+    }
+
+    if(!fp) {
+        error("Cannot read file '%s'.", buffer);
+        return 0;
+    }
+
+    pid_t pid = 0;
+    char *s;
+    while((s = fgets(buffer, FILENAME_MAX, fp))) {
+        pid = atoi(s);
+        if(pid > 0) break;
+    }
+
+    fclose(fp);
+    return pid;
+}
+
+void usage(void) {
+    fprintf(stderr, "%s [ -p PID | --pid PID | --cgroup /path/to/cgroup ]\n", program_name);
+    exit(1);
+}
+
+int main(int argc, char **argv) {
+    pid_t pid = 0;
+
+    program_name = argv[0];
+    program_version = VERSION;
+    error_log_syslog = 0;
+
+    if(argc == 2 && (!strcmp(argv[1], "version") || !strcmp(argv[1], "-version") || !strcmp(argv[1], "--version") || !strcmp(argv[1], "-v") || !strcmp(argv[1], "-V"))) {
+        fprintf(stderr, "cgroup-network %s\n", VERSION);
+        exit(0);
+    }
+
+    if(argc != 3)
+        usage();
+
+    if(!strcmp(argv[1], "-p") || !strcmp(argv[1], "--pid")) {
+        pid = atoi(argv[2]);
+    }
+    else if(!strcmp(argv[1], "--cgroup")) {
+        pid = read_pid_from_cgroup(argv[2]);
+    }
+    else
+        usage();
+
+    if(pid <= 0)
+        fatal("Invalid pid %d", (int)pid);
+
+    struct iface *host, *cgroup, *h, *c;
+    const char *prefix = getenv("NETDATA_HOST_PREFIX");
+
+    host = read_proc_net_dev(prefix);
+    if(!host)
+        fatal("cannot read host interface list.");
+
+    if(!eligible_ifaces(host))
+        fatal("there are no double-linked host interfaces available.");
+
+    if(switch_namespace(prefix, pid))
+        fatal("cannot switch to the namespace of pid %u", (unsigned int)pid);
+
+    cgroup = read_proc_net_dev(NULL);
+    if(!cgroup)
+        fatal("cannot read cgroup interface list.");
+
+    if(!eligible_ifaces(cgroup))
+        fatal("there are not double-linked cgroup interfaces available.");
+
+    int found = 0;
+    for(h = host; h ; h = h->next) {
+        if(iface_is_eligible(h)) {
+            for (c = cgroup; c; c = c->next) {
+                if(iface_is_eligible(c) && h->ifindex == c->iflink && h->iflink == c->ifindex) {
+                    printf("%s %s\n", h->device, c->device);
+                    found++;
+                }
+            }
+        }
+    }
+
+    if(!found)
+        return 1;
+
+    return 0;
+}
diff --git a/src/common.c b/src/common.c
index aa75c198..5a953672 100644
--- a/src/common.c
+++ b/src/common.c
@@ -227,9 +227,18 @@ void json_escape_string(char *dst, const char *src, size_t size) {
 }
 
 void json_fix_string(char *s) {
-    for( ; *s ;s++) {
-        if(unlikely(*s == '\\')) *s = '/';
-        else if(unlikely(*s == '"')) *s = '\'';
+    unsigned char c;
+    while((c = (unsigned char)*s)) {
+        if(unlikely(c == '\\'))
+            *s++ = '/';
+        else if(unlikely(c == '"'))
+            *s++ = '\'';
+        else if(unlikely(isspace(c) || iscntrl(c)))
+            *s++ = ' ';
+        else if(unlikely(!isprint(c) || c > 127))
+            *s++ = '_';
+        else
+            s++;
     }
 }
 
diff --git a/src/common.h b/src/common.h
index efeebf16..51d2bba5 100644
--- a/src/common.h
+++ b/src/common.h
@@ -80,6 +80,7 @@
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <sys/un.h>
 #include <time.h>
 #include <unistd.h>
 #include <uuid/uuid.h>
@@ -215,6 +216,7 @@
 #include "web_client.h"
 #include "web_server.h"
 #include "registry.h"
+#include "signals.h"
 #include "daemon.h"
 #include "main.h"
 #include "unit_test.h"
@@ -309,4 +311,6 @@ extern const char *program_version;
 #endif
 #endif
 
+#define BITS_IN_A_KILOBIT 1000
+
 #endif /* NETDATA_COMMON_H */
diff --git a/src/daemon.c b/src/daemon.c
index bc02446e..5c5333a3 100644
--- a/src/daemon.c
+++ b/src/daemon.c
@@ -3,45 +3,6 @@
 
 char pidfile[FILENAME_MAX + 1] = "";
 
-void sig_handler_exit(int signo)
-{
-    if(signo) {
-        error_log_limit_unlimited();
-        error("Received signal %d. Exiting...", signo);
-        netdata_exit = 1;
-    }
-}
-
-void sig_handler_logrotate(int signo)
-{
-    if(signo) {
-        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_unlimited();
-        info("Received signal %d to save the database...", signo);
-        rrdhost_save_all();
-        error_log_limit_reset();
-    }
-}
-
-void sig_handler_reload_health(int signo)
-{
-    if(signo) {
-        error_log_limit_unlimited();
-        info("Received signal %d to reload health configuration...", signo);
-        health_reload();
-        error_log_limit_reset();
-    }
-}
-
 static void chown_open_file(int fd, uid_t uid, gid_t gid) {
     if(fd == -1) return;
 
@@ -167,34 +128,70 @@ int become_user(const char *username, int pid_fd) {
 #endif
 
 static void oom_score_adj(void) {
-    char buf[10 + 1];
-    snprintfz(buf, 10, "%d", OOM_SCORE_ADJ_MAX);
+    char buf[30 + 1];
+    long long int old_score, wanted_score = OOM_SCORE_ADJ_MAX, final_score = 0;
+
+    // read the existing score
+    if(read_single_signed_number_file("/proc/self/oom_score_adj", &old_score)) {
+        error("Out-Of-Memory (OOM) score setting is not supported on this system.");
+        return;
+    }
+
+    if(old_score != 0)
+        wanted_score = old_score;
 
     // check the environment
     char *s = getenv("OOMScoreAdjust");
-    if(!s || !*s) s = buf;
+    if(!s || !*s) {
+        snprintfz(buf, 30, "%d", (int)wanted_score);
+        s = buf;
+    }
 
     // check netdata.conf configuration
     s = config_get(CONFIG_SECTION_GLOBAL, "OOM score", s);
-    if(!s || !*s) s = buf;
+    if(s && *s && (isdigit(*s) || *s == '-' || *s == '+'))
+        wanted_score = atoll(s);
+    else {
+        info("Out-Of-Memory (OOM) score not changed due to non-numeric setting: '%s' (running with %d)", s, (int)old_score);
+        return;
+    }
 
-    if(!isdigit(*s) && *s != '-' && *s != '+') {
-        info("Out-Of-Memory score not changed due to setting: '%s'", s);
+    if(wanted_score < OOM_SCORE_ADJ_MIN) {
+        error("Wanted Out-Of-Memory (OOM) score %d is too small. Using %d", (int)wanted_score, (int)OOM_SCORE_ADJ_MIN);
+        wanted_score = OOM_SCORE_ADJ_MIN;
+    }
+
+    if(wanted_score > OOM_SCORE_ADJ_MAX) {
+        error("Wanted Out-Of-Memory (OOM) score %d is too big. Using %d", (int)wanted_score, (int)OOM_SCORE_ADJ_MAX);
+        wanted_score = OOM_SCORE_ADJ_MAX;
+    }
+
+    if(old_score == wanted_score) {
+        info("Out-Of-Memory (OOM) score is already set to the wanted value %d", (int)old_score);
         return;
     }
 
-    int done = 0;
+    int written = 0;
     int fd = open("/proc/self/oom_score_adj", O_WRONLY);
     if(fd != -1) {
-        ssize_t len = strlen(s);
-        if(len > 0 && write(fd, buf, (size_t)len) == len) done = 1;
+        snprintfz(buf, 30, "%d", (int)wanted_score);
+        ssize_t len = strlen(buf);
+        if(len > 0 && write(fd, buf, (size_t)len) == len) written = 1;
         close(fd);
-    }
 
-    if(!done)
-        error("Cannot adjust my Out-Of-Memory score to '%s'.", s);
+        if(written) {
+            if(read_single_signed_number_file("/proc/self/oom_score_adj", &final_score))
+                error("Adjusted my Out-Of-Memory (OOM) score to %d, but cannot verify it.", (int)wanted_score);
+            else if(final_score == wanted_score)
+                info("Adjusted my Out-Of-Memory (OOM) score from %d to %d.", (int)old_score, (int)final_score);
+            else
+                error("Adjusted my Out-Of-Memory (OOM) score from %d to %d, but it has been set to %d.", (int)old_score, (int)wanted_score, (int)final_score);
+        }
+        else
+            error("Failed to adjust my Out-Of-Memory (OOM) score to %d. Running with %d. (systemd systems may change it via netdata.service)", (int)wanted_score, (int)old_score);
+    }
     else
-        info("Adjusted my Out-Of-Memory score to '%s'.", s);
+        error("Failed to adjust my Out-Of-Memory (OOM) score. Cannot open /proc/self/oom_score_adj for writing.");
 }
 
 static void process_nice_level(void) {
diff --git a/src/daemon.h b/src/daemon.h
index b193602d..150d74e3 100644
--- a/src/daemon.h
+++ b/src/daemon.h
@@ -1,11 +1,6 @@
 #ifndef NETDATA_DAEMON_H
 #define NETDATA_DAEMON_H 1
 
-extern void sig_handler_exit(int signo);
-extern void sig_handler_save(int signo);
-extern void sig_handler_logrotate(int signo);
-extern void sig_handler_reload_health(int signo);
-
 extern int become_user(const char *username, int pid_fd);
 
 extern int become_daemon(int dont_fork, const char *user);
diff --git a/src/freebsd_getifaddrs.c b/src/freebsd_getifaddrs.c
index 7355fac9..1a4448bd 100644
--- a/src/freebsd_getifaddrs.c
+++ b/src/freebsd_getifaddrs.c
@@ -2,7 +2,7 @@
 
 #include <ifaddrs.h>
 
-struct network_interface {
+struct cgroup_network_interface {
     char *name;
     uint32_t hash;
     size_t len;
@@ -41,14 +41,14 @@ struct network_interface {
     RRDSET *st_events;
     RRDDIM *rd_events_coll;
 
-    struct network_interface *next;
+    struct cgroup_network_interface *next;
 };
 
-static struct network_interface *network_interfaces_root = NULL, *network_interfaces_last_used = NULL;
+static struct cgroup_network_interface *network_interfaces_root = NULL, *network_interfaces_last_used = NULL;
 
 static size_t network_interfaces_added = 0, network_interfaces_found = 0;
 
-static void network_interface_free(struct network_interface *ifm) {
+static void network_interface_free(struct cgroup_network_interface *ifm) {
     if (likely(ifm->st_bandwidth))
         rrdset_is_obsolete(ifm->st_bandwidth);
     if (likely(ifm->st_packets))
@@ -68,7 +68,7 @@ static void network_interface_free(struct network_interface *ifm) {
 static void network_interfaces_cleanup() {
     if (likely(network_interfaces_found == network_interfaces_added)) return;
 
-    struct network_interface *ifm = network_interfaces_root, *last = NULL;
+    struct cgroup_network_interface *ifm = network_interfaces_root, *last = NULL;
     while(ifm) {
         if (unlikely(!ifm->updated)) {
             // info("Removing network interface '%s', linked after '%s'", ifm->name, last?last->name:"ROOT");
@@ -76,7 +76,7 @@ static void network_interfaces_cleanup() {
             if (network_interfaces_last_used == ifm)
                 network_interfaces_last_used = last;
 
-            struct network_interface *t = ifm;
+            struct cgroup_network_interface *t = ifm;
 
             if (ifm == network_interfaces_root || !last)
                 network_interfaces_root = ifm = ifm->next;
@@ -95,8 +95,8 @@ static void network_interfaces_cleanup() {
     }
 }
 
-static struct network_interface *get_network_interface(const char *name) {
-    struct network_interface *ifm;
+static struct cgroup_network_interface *get_network_interface(const char *name) {
+    struct cgroup_network_interface *ifm;
 
     uint32_t hash = simple_hash(name);
 
@@ -117,7 +117,7 @@ static struct network_interface *get_network_interface(const char *name) {
     }
 
     // create a new one
-    ifm = callocz(1, sizeof(struct network_interface));
+    ifm = callocz(1, sizeof(struct cgroup_network_interface));
     ifm->name = strdupz(name);
     ifm->hash = simple_hash(ifm->name);
     ifm->len = strlen(ifm->name);
@@ -125,7 +125,7 @@ static struct network_interface *get_network_interface(const char *name) {
 
     // link it to the end
     if (network_interfaces_root) {
-        struct network_interface *e;
+        struct cgroup_network_interface *e;
         for(e = network_interfaces_root; e->next ; e = e->next) ;
         e->next = ifm;
     }
@@ -233,8 +233,8 @@ int do_getifaddrs(int update_every, usec_t dt) {
                                                  RRDSET_TYPE_AREA
                     );
 
-                    rd_in  = rrddim_add(st, "InOctets",  "received", 8, KILO_FACTOR, RRD_ALGORITHM_INCREMENTAL);
-                    rd_out = rrddim_add(st, "OutOctets", "sent",    -8, KILO_FACTOR, RRD_ALGORITHM_INCREMENTAL);
+                    rd_in  = rrddim_add(st, "InOctets",  "received", 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                    rd_out = rrddim_add(st, "OutOctets", "sent",    -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                 } else
                     rrdset_next(st);
 
@@ -270,8 +270,8 @@ int do_getifaddrs(int update_every, usec_t dt) {
                                                  RRDSET_TYPE_AREA
                     );
 
-                    rd_in  = rrddim_add(st, "received", NULL,  8, KILO_FACTOR, RRD_ALGORITHM_INCREMENTAL);
-                    rd_out = rrddim_add(st, "sent",     NULL, -8, KILO_FACTOR, RRD_ALGORITHM_INCREMENTAL);
+                    rd_in  = rrddim_add(st, "received", NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                    rd_out = rrddim_add(st, "sent",     NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                 } else
                     rrdset_next(st);
 
@@ -288,7 +288,7 @@ int do_getifaddrs(int update_every, usec_t dt) {
                 if (ifa->ifa_addr->sa_family != AF_LINK)
                     continue;
 
-                struct network_interface *ifm = get_network_interface(ifa->ifa_name);
+                struct cgroup_network_interface *ifm = get_network_interface(ifa->ifa_name);
                 ifm->updated = 1;
                 network_interfaces_found++;
 
@@ -338,10 +338,8 @@ int do_getifaddrs(int update_every, usec_t dt) {
                                                                     RRDSET_TYPE_AREA
                         );
 
-                        ifm->rd_bandwidth_in  = rrddim_add(ifm->st_bandwidth, "received", NULL,  8, KILO_FACTOR,
-                                                           RRD_ALGORITHM_INCREMENTAL);
-                        ifm->rd_bandwidth_out = rrddim_add(ifm->st_bandwidth, "sent",     NULL, -8, KILO_FACTOR,
-                                                           RRD_ALGORITHM_INCREMENTAL);
+                        ifm->rd_bandwidth_in  = rrddim_add(ifm->st_bandwidth, "received", NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                        ifm->rd_bandwidth_out = rrddim_add(ifm->st_bandwidth, "sent",     NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                     } else
                         rrdset_next(ifm->st_bandwidth);
 
diff --git a/src/freebsd_sysctl.c b/src/freebsd_sysctl.c
index d2f0eaa8..a87b872d 100644
--- a/src/freebsd_sysctl.c
+++ b/src/freebsd_sysctl.c
@@ -373,6 +373,76 @@ int do_kern_cp_times(int update_every, usec_t dt) {
 }
 
 // --------------------------------------------------------------------------------------------------------------------
+// dev.cpu.temperature
+
+int do_dev_cpu_temperature(int update_every, usec_t dt) {
+    (void)dt;
+
+    int i;
+    static int *mib = NULL;
+    static int *pcpu_temperature = NULL;
+    static int old_number_of_cpus = 0;
+    char char_mib[MAX_INT_DIGITS + 21];
+    char char_rd[MAX_INT_DIGITS + 9];
+
+    if (unlikely(number_of_cpus != old_number_of_cpus)) {
+        pcpu_temperature = reallocz(pcpu_temperature, sizeof(int) * number_of_cpus);
+        mib = reallocz(mib, sizeof(int) * number_of_cpus * 4);
+        if (unlikely(number_of_cpus > old_number_of_cpus))
+            memset(&mib[old_number_of_cpus * 4], 0, sizeof(RRDDIM) * (number_of_cpus - old_number_of_cpus));
+    }
+    for (i = 0; i < number_of_cpus; i++) {
+        if (unlikely(!(mib[i * 4])))
+            sprintf(char_mib, "dev.cpu.%d.temperature", i);
+        if (unlikely(getsysctl_simple(char_mib, &mib[i * 4], 4, &pcpu_temperature[i], sizeof(int)))) {
+            error("DISABLED: cpu.temperature chart");
+            error("DISABLED: dev.cpu.temperature module");
+            return 1;
+        }
+    }
+
+    // --------------------------------------------------------------------
+
+    static RRDSET *st;
+    static RRDDIM **rd_pcpu_temperature;
+
+    if (unlikely(number_of_cpus != old_number_of_cpus)) {
+        rd_pcpu_temperature = reallocz(rd_pcpu_temperature, sizeof(RRDDIM) * number_of_cpus);
+        if (unlikely(number_of_cpus > old_number_of_cpus))
+            memset(&rd_pcpu_temperature[old_number_of_cpus], 0, sizeof(RRDDIM) * (number_of_cpus - old_number_of_cpus));
+    }
+
+    if (unlikely(!st)) {
+        st = rrdset_create_localhost("cpu",
+                                     "temperature",
+                                     NULL,
+                                     "temperature",
+                                     "cpu.temperatute",
+                                     "Core temperature",
+                                     "degree",
+                                     1050,
+                                     update_every,
+                                     RRDSET_TYPE_LINE
+        );
+    } else rrdset_next(st);
+
+    for (i = 0; i < number_of_cpus; i++) {
+        if (unlikely(!rd_pcpu_temperature[i])) {
+            sprintf(char_rd, "cpu%d.temp", i);
+            rd_pcpu_temperature[i] = rrddim_add(st, char_rd, NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+        }
+
+        rrddim_set_by_pointer(st, rd_pcpu_temperature[i], (collected_number) ((double)pcpu_temperature[i] / 10 - 273.15));
+    }
+
+    rrdset_done(st);
+
+    old_number_of_cpus = number_of_cpus;
+
+    return 0;
+}
+
+// --------------------------------------------------------------------------------------------------------------------
 // hw.intrcnt
 
 int do_hw_intcnt(int update_every, usec_t dt) {
@@ -1985,7 +2055,7 @@ int do_net_inet_icmp_stats(int update_every, usec_t dt) {
                 static RRDDIM *rd_in_reps = NULL, *rd_out_reps = NULL, *rd_in = NULL, *rd_out = NULL;
 
                 if (unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "icmpmsg", NULL, "icmp", NULL, "IPv4 ICMP Messsages",
+                    st = rrdset_create_localhost("ipv4", "icmpmsg", NULL, "icmp", NULL, "IPv4 ICMP Messages",
                                                  "packets/s", 2604, update_every, RRDSET_TYPE_LINE);
 
                     rd_in_reps  = rrddim_add(st, "InEchoReps",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
diff --git a/src/freeipmi_plugin.c b/src/freeipmi_plugin.c
index 146268a5..42a1ac01 100644
--- a/src/freeipmi_plugin.c
+++ b/src/freeipmi_plugin.c
@@ -1433,7 +1433,7 @@ int main (int argc, char **argv) {
                 continue;
             }
         }
-        else if(strcmp("version", argv[i]) == 0 || strcmp("-v", argv[i]) == 0 || strcmp("-V", argv[i]) == 0) {
+        else if(strcmp("version", argv[i]) == 0 || strcmp("-version", argv[i]) == 0 || strcmp("--version", argv[i]) == 0 || strcmp("-v", argv[i]) == 0 || strcmp("-V", argv[i]) == 0) {
             printf("freeipmi.plugin %s\n", VERSION);
             exit(0);
         }
diff --git a/src/global_statistics.c b/src/global_statistics.c
index 8575061a..88688908 100644
--- a/src/global_statistics.c
+++ b/src/global_statistics.c
@@ -199,8 +199,8 @@ void global_statistics_charts(void) {
         stbytes = rrdset_create_localhost("netdata", "net", NULL, "netdata", NULL, "NetData Network Traffic"
                                           , "kilobits/s", 130000, localhost->rrd_update_every, RRDSET_TYPE_AREA);
 
-        rrddim_add(stbytes, "in", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-        rrddim_add(stbytes, "out", NULL, -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+        rrddim_add(stbytes, "in",  NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+        rrddim_add(stbytes, "out", NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
     } else rrdset_next(stbytes);
 
     rrddim_set(stbytes, "in", (collected_number) gs.bytes_received);
diff --git a/src/health.c b/src/health.c
index cc470f81..136a1ecd 100644
--- a/src/health.c
+++ b/src/health.c
@@ -204,14 +204,13 @@ static inline void health_process_notifications(RRDHOST *host, ALARM_ENTRY *ae)
 }
 
 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 = now_realtime_sec();
 
     netdata_rwlock_rdlock(&host->health_log.alarm_log_rwlock);
 
     ALARM_ENTRY *ae;
-    for(ae = host->health_log.alarms; ae && ae->unique_id >= stop_at_id ; ae = ae->next) {
+    for(ae = host->health_log.alarms; ae && ae->unique_id >= host->health_last_processed_id ; ae = ae->next) {
         if(unlikely(
             !(ae->flags & HEALTH_ENTRY_FLAG_PROCESSED) &&
             !(ae->flags & HEALTH_ENTRY_FLAG_UPDATED)
@@ -226,7 +225,7 @@ static inline void health_alarm_log_process(RRDHOST *host) {
     }
 
     // remember this for the next iteration
-    stop_at_id = first_waiting;
+    host->health_last_processed_id = first_waiting;
 
     netdata_rwlock_unlock(&host->health_log.alarm_log_rwlock);
 
@@ -323,6 +322,23 @@ static inline int rrdcalc_isrunnable(RRDCALC *rc, time_t now, time_t *next_run)
     return 1;
 }
 
+static inline int check_if_resumed_from_suspention(void) {
+    static usec_t last_realtime = 0, last_monotonic = 0;
+    usec_t realtime = now_realtime_usec(), monotonic = now_monotonic_usec();
+    int ret = 0;
+
+    // detect if monotonic and realtime have twice the difference
+    // in which case we assume the system was just waken from hibernation
+
+    if(last_realtime && last_monotonic && realtime - last_realtime > 2 * (monotonic - last_monotonic))
+        ret = 1;
+
+    last_realtime = realtime;
+    last_monotonic = monotonic;
+
+    return ret;
+}
+
 void *health_main(void *ptr) {
     struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
 
@@ -339,11 +355,8 @@ void *health_main(void *ptr) {
 
     BUFFER *wb = buffer_create(100);
 
-    time_t now               = now_realtime_sec();
-    time_t now_boottime      = now_boottime_sec();
-    time_t last_now          = now;
-    time_t last_now_boottime = now_boottime;
-    time_t hibernation_delay = config_get_number(CONFIG_SECTION_HEALTH, "postpone alarms during hibernation for seconds", 60);
+    time_t now                = now_realtime_sec();
+    time_t hibernation_delay  = config_get_number(CONFIG_SECTION_HEALTH, "postpone alarms during hibernation for seconds", 60);
 
     unsigned int loop = 0;
     while(!netdata_exit) {
@@ -354,21 +367,14 @@ void *health_main(void *ptr) {
         time_t next_run = now + min_run_every;
         RRDCALC *rc;
 
-        // detect if boottime and realtime have twice the difference
-        // in which case we assume the system was just waken from hibernation
-        if(unlikely(now - last_now > 2 * (now_boottime - last_now_boottime))) {
+        if(unlikely(check_if_resumed_from_suspention())) {
             apply_hibernation_delay = 1;
 
-            info("Postponing alarm checks for %ld seconds, due to boottime discrepancy (realtime dt: %ld, boottime dt: %ld)."
+            info("Postponing alarm checks for %ld seconds, because it seems that the system was just resumed from suspension."
             , hibernation_delay
-            , (long)(now - last_now)
-            , (long)(now_boottime - last_now_boottime)
             );
         }
 
-        last_now = now;
-        last_now_boottime = now_boottime;
-
         if(unlikely(pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &oldstate) != 0))
             error("Cannot set pthread cancel state to DISABLE.");
 
@@ -381,7 +387,7 @@ void *health_main(void *ptr) {
 
             if(unlikely(apply_hibernation_delay)) {
 
-                info("Postponing alarm checks for %ld seconds, on host '%s'."
+                info("Postponing health checks for %ld seconds, on host '%s'."
                      , hibernation_delay
                      , host->hostname
                 );
@@ -389,8 +395,13 @@ void *health_main(void *ptr) {
                 host->health_delay_up_to = now + hibernation_delay;
             }
 
-            if(unlikely(!host->health_enabled || now < host->health_delay_up_to))
-                continue;
+            if(unlikely(host->health_delay_up_to)) {
+                if(unlikely(now < host->health_delay_up_to))
+                    continue;
+
+                info("Resuming health checks on host '%s'.", host->hostname);
+                host->health_delay_up_to = 0;
+            }
 
             rrdhost_rdlock(host);
 
@@ -726,8 +737,6 @@ void *health_main(void *ptr) {
         else
             debug(D_HEALTH, "Health monitoring iteration no %u done. Next iteration now", loop);
 
-        now_boottime = now_boottime_sec();
-
     } // forever
 
     buffer_free(wb);
diff --git a/src/health_config.c b/src/health_config.c
index b4655dc7..2ead82ef 100644
--- a/src/health_config.c
+++ b/src/health_config.c
@@ -6,6 +6,8 @@
 #define HEALTH_ALARM_KEY "alarm"
 #define HEALTH_TEMPLATE_KEY "template"
 #define HEALTH_ON_KEY "on"
+#define HEALTH_HOST_KEY "hosts"
+#define HEALTH_OS_KEY "os"
 #define HEALTH_FAMILIES_KEY "families"
 #define HEALTH_LOOKUP_KEY "lookup"
 #define HEALTH_CALC_KEY "calc"
@@ -88,7 +90,10 @@ static inline int rrdcalctemplate_add_template_from_config(RRDHOST *host, RRDCAL
 
     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))) {
+        if(unlikely(t->hash_name == rt->hash_name
+                    && !strcmp(t->name, rt->name)
+                    && !strcmp(t->family_match?t->family_match:"*", rt->family_match?rt->family_match:"*")
+        )) {
             error("Health configuration template '%s' already exists for host '%s'.", rt->name, host->hostname);
             return 0;
         }
@@ -400,7 +405,9 @@ int health_readfile(RRDHOST *host, const char *path, const char *filename) {
     static uint32_t
             hash_alarm = 0,
             hash_template = 0,
+            hash_os = 0,
             hash_on = 0,
+            hash_host = 0,
             hash_families = 0,
             hash_calc = 0,
             hash_green = 0,
@@ -422,6 +429,8 @@ int health_readfile(RRDHOST *host, const char *path, const char *filename) {
         hash_alarm = simple_uhash(HEALTH_ALARM_KEY);
         hash_template = simple_uhash(HEALTH_TEMPLATE_KEY);
         hash_on = simple_uhash(HEALTH_ON_KEY);
+        hash_os = simple_uhash(HEALTH_OS_KEY);
+        hash_host = simple_uhash(HEALTH_HOST_KEY);
         hash_families = simple_uhash(HEALTH_FAMILIES_KEY);
         hash_calc = simple_uhash(HEALTH_CALC_KEY);
         hash_lookup = simple_uhash(HEALTH_LOOKUP_KEY);
@@ -448,6 +457,7 @@ int health_readfile(RRDHOST *host, const char *path, const char *filename) {
     RRDCALC *rc = NULL;
     RRDCALCTEMPLATE *rt = NULL;
 
+    int ignore_this = 0;
     size_t line = 0, append = 0;
     char *s;
     while((s = fgets(&buffer[append], (int)(HEALTH_CONF_MAX_LINE - append), fp)) || append) {
@@ -494,11 +504,11 @@ int health_readfile(RRDHOST *host, const char *path, const char *filename) {
         uint32_t hash = simple_uhash(key);
 
         if(hash == hash_alarm && !strcasecmp(key, HEALTH_ALARM_KEY)) {
-            if(rc && !rrdcalc_add_alarm_from_config(host, rc))
+            if (rc && (ignore_this || !rrdcalc_add_alarm_from_config(host, rc)))
                 rrdcalc_free(host, rc);
 
             if(rt) {
-                if (!rrdcalctemplate_add_template_from_config(host, rt))
+                if (ignore_this || !rrdcalctemplate_add_template_from_config(host, rt))
                     rrdcalctemplate_free(host, rt);
                 rt = NULL;
             }
@@ -516,15 +526,17 @@ int health_readfile(RRDHOST *host, const char *path, const char *filename) {
 
             if(rrdvar_fix_name(rc->name))
                 error("Health configuration renamed alarm '%s' to '%s'", value, rc->name);
+
+            ignore_this = 0;
         }
         else if(hash == hash_template && !strcasecmp(key, HEALTH_TEMPLATE_KEY)) {
             if(rc) {
-                if(!rrdcalc_add_alarm_from_config(host, rc))
+                if(ignore_this || !rrdcalc_add_alarm_from_config(host, rc))
                     rrdcalc_free(host, rc);
                 rc = NULL;
             }
 
-            if(rt && !rrdcalctemplate_add_template_from_config(host, rt))
+            if(rt && (ignore_this || !rrdcalctemplate_add_template_from_config(host, rt)))
                 rrdcalctemplate_free(host, rt);
 
             rt = callocz(1, sizeof(RRDCALCTEMPLATE));
@@ -537,6 +549,40 @@ int health_readfile(RRDHOST *host, const char *path, const char *filename) {
 
             if(rrdvar_fix_name(rt->name))
                 error("Health configuration renamed template '%s' to '%s'", value, rt->name);
+
+            ignore_this = 0;
+        }
+        else if(hash == hash_os && !strcasecmp(key, HEALTH_OS_KEY)) {
+            char *os_match = value;
+            SIMPLE_PATTERN *os_pattern = simple_pattern_create(os_match, SIMPLE_PATTERN_EXACT);
+
+            if(!simple_pattern_matches(os_pattern, host->os)) {
+                if(rc)
+                    debug(D_HEALTH, "HEALTH on '%s' ignoring alarm '%s' defined at %zu@%s/%s: host O/S does not match '%s'", host->hostname, rc->name, line, path, filename, os_match);
+
+                if(rt)
+                    debug(D_HEALTH, "HEALTH on '%s' ignoring template '%s' defined at %zu@%s/%s: host O/S does not match '%s'", host->hostname, rt->name, line, path, filename, os_match);
+
+                ignore_this = 1;
+            }
+
+            simple_pattern_free(os_pattern);
+        }
+        else if(hash == hash_host && !strcasecmp(key, HEALTH_HOST_KEY)) {
+            char *host_match = value;
+            SIMPLE_PATTERN *host_pattern = simple_pattern_create(host_match, SIMPLE_PATTERN_EXACT);
+
+            if(!simple_pattern_matches(host_pattern, host->hostname)) {
+                if(rc)
+                    debug(D_HEALTH, "HEALTH on '%s' ignoring alarm '%s' defined at %zu@%s/%s: hostname does not match '%s'", host->hostname, rc->name, line, path, filename, host_match);
+
+                if(rt)
+                    debug(D_HEALTH, "HEALTH on '%s' ignoring template '%s' defined at %zu@%s/%s: hostname does not match '%s'", host->hostname, rt->name, line, path, filename, host_match);
+
+                ignore_this = 1;
+            }
+
+            simple_pattern_free(host_pattern);
         }
         else if(rc) {
             if(hash == hash_on && !strcasecmp(key, HEALTH_ON_KEY)) {
@@ -786,10 +832,10 @@ int health_readfile(RRDHOST *host, const char *path, const char *filename) {
         }
     }
 
-    if(rc && !rrdcalc_add_alarm_from_config(host, rc))
+    if(rc && (ignore_this || !rrdcalc_add_alarm_from_config(host, rc)))
         rrdcalc_free(host, rc);
 
-    if(rt && !rrdcalctemplate_add_template_from_config(host, rt))
+    if(rt && (ignore_this || !rrdcalctemplate_add_template_from_config(host, rt)))
         rrdcalctemplate_free(host, rt);
 
     fclose(fp);
diff --git a/src/health_log.c b/src/health_log.c
index 95abcfe5..9881d35d 100644
--- a/src/health_log.c
+++ b/src/health_log.c
@@ -121,8 +121,6 @@ inline void health_alarm_log_save(RRDHOST *host, ALARM_ENTRY *ae) {
 }
 
 inline ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filename) {
-    static uint32_t max_unique_id = 0, max_alarm_id = 0;
-
     errno = 0;
 
     char *s, *buf = mallocz(65536 + 1);
@@ -271,7 +269,7 @@ inline ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filena
             ae->new_value   = str2l(pointers[25]);
             ae->old_value   = str2l(pointers[26]);
 
-            static char value_string[100 + 1];
+            char value_string[100 + 1];
             freez(ae->old_value_string);
             freez(ae->new_value_string);
             ae->old_value_string = strdupz(format_value_and_unit(value_string, 100, ae->old_value, ae->units, -1));
@@ -285,11 +283,11 @@ inline ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filena
             }
             else updated++;
 
-            if(unlikely(ae->unique_id > max_unique_id))
-                max_unique_id = ae->unique_id;
+            if(unlikely(ae->unique_id > host->health_max_unique_id))
+                host->health_max_unique_id = ae->unique_id;
 
-            if(unlikely(ae->alarm_id >= max_alarm_id))
-                max_alarm_id = ae->alarm_id;
+            if(unlikely(ae->alarm_id >= host->health_max_alarm_id))
+                host->health_max_alarm_id = ae->alarm_id;
         }
         else {
             error("HEALTH [%s]: line %zu of file '%s' is invalid (unrecognized entry type '%s').", host->hostname, line, filename, pointers[0]);
@@ -301,11 +299,11 @@ inline ssize_t health_alarm_log_read(RRDHOST *host, FILE *fp, const char *filena
 
     freez(buf);
 
-    if(!max_unique_id) max_unique_id = (uint32_t)now_realtime_sec();
-    if(!max_alarm_id)  max_alarm_id  = (uint32_t)now_realtime_sec();
+    if(!host->health_max_unique_id) host->health_max_unique_id = (uint32_t)now_realtime_sec();
+    if(!host->health_max_alarm_id)  host->health_max_alarm_id  = (uint32_t)now_realtime_sec();
 
-    host->health_log.next_log_id = max_unique_id + 1;
-    host->health_log.next_alarm_id = max_alarm_id + 1;
+    host->health_log.next_log_id = host->health_max_unique_id + 1;
+    host->health_log.next_alarm_id = host->health_max_alarm_id + 1;
 
     debug(D_HEALTH, "HEALTH [%s]: loaded file '%s' with %zd new alarm entries, updated %zd alarms, errors %zd entries, duplicate %zd", host->hostname, filename, loaded, updated, errored, duplicate);
     return loaded;
@@ -388,7 +386,7 @@ inline void health_alarm_log(
     ae->old_value = old_value;
     ae->new_value = new_value;
 
-    static char value_string[100 + 1];
+    char value_string[100 + 1];
     ae->old_value_string = strdupz(format_value_and_unit(value_string, 100, ae->old_value, ae->units, -1));
     ae->new_value_string = strdupz(format_value_and_unit(value_string, 100, ae->new_value, ae->units, -1));
 
diff --git a/src/inlined.h b/src/inlined.h
index f1812ba1..9ab2dca7 100644
--- a/src/inlined.h
+++ b/src/inlined.h
@@ -244,26 +244,48 @@ static inline char *strncpyz(char *dst, const char *src, size_t n) {
     return p;
 }
 
-static inline int read_single_number_file(const char *filename, unsigned long long *result) {
-    char buffer[30 + 1];
-
+static inline int read_file(const char *filename, char *buffer, size_t size) {
     int fd = open(filename, O_RDONLY, 0666);
-    if(unlikely(fd == -1)) {
-        *result = 0;
+    if(unlikely(fd == -1))
         return 1;
-    }
 
-    ssize_t r = read(fd, buffer, 30);
+    ssize_t r = read(fd, buffer, size);
     if(unlikely(r == -1)) {
-        *result = 0;
         close(fd);
         return 2;
     }
+    buffer[r] = '\0';
 
     close(fd);
+    return 0;
+}
+
+static inline int read_single_number_file(const char *filename, unsigned long long *result) {
+    char buffer[30 + 1];
+
+    int ret = read_file(filename, buffer, 30);
+    if(unlikely(ret)) {
+        *result = 0;
+        return ret;
+    }
+
     buffer[30] = '\0';
     *result = str2ull(buffer);
     return 0;
 }
 
+static inline int read_single_signed_number_file(const char *filename, long long *result) {
+    char buffer[30 + 1];
+
+    int ret = read_file(filename, buffer, 30);
+    if(unlikely(ret)) {
+        *result = 0;
+        return ret;
+    }
+
+    buffer[30] = '\0';
+    *result = atoll(buffer);
+    return 0;
+}
+
 #endif //NETDATA_INLINED_H
diff --git a/src/macos_fw.c b/src/macos_fw.c
index c47da52f..fa103e11 100644
--- a/src/macos_fw.c
+++ b/src/macos_fw.c
@@ -420,8 +420,8 @@ int do_macos_iokit(int update_every, usec_t dt) {
                     st = rrdset_create_localhost("net", ifa->ifa_name, NULL, ifa->ifa_name, "net.net", "Bandwidth"
                                                  , "kilobits/s", 7000, update_every, RRDSET_TYPE_AREA);
 
-                    rrddim_add(st, "received", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "sent", NULL, -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+                    rrddim_add(st, "received", NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                    rrddim_add(st, "sent",     NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
diff --git a/src/macos_sysctl.c b/src/macos_sysctl.c
index af229fb6..843aceae 100644
--- a/src/macos_sysctl.c
+++ b/src/macos_sysctl.c
@@ -299,8 +299,8 @@ int do_macos_sysctl(int update_every, usec_t dt) {
                     st = rrdset_create_localhost("system", "ipv4", NULL, "network", NULL, "IPv4 Bandwidth", "kilobits/s"
                                                  , 500, update_every, RRDSET_TYPE_AREA);
 
-                    rrddim_add(st, "InOctets", "received", 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "OutOctets", "sent", -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+                    rrddim_add(st, "InOctets",  "received", 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                    rrddim_add(st, "OutOctets", "sent",    -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                 }
                 else rrdset_next(st);
 
@@ -588,7 +588,7 @@ int do_macos_sysctl(int update_every, usec_t dt) {
             if (likely(do_icmpmsg)) {
                 st = rrdset_find_localhost("ipv4.icmpmsg");
                 if (unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "icmpmsg", NULL, "icmp", NULL, "IPv4 ICMP Messsages"
+                    st = rrdset_create_localhost("ipv4", "icmpmsg", NULL, "icmp", NULL, "IPv4 ICMP Messages"
                                                  , "packets/s", 2604, update_every, RRDSET_TYPE_LINE);
 
                     rrddim_add(st, "InEchoReps", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
diff --git a/src/main.c b/src/main.c
index bf5d787a..89ca828a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -172,7 +172,7 @@ void kill_childs()
         // it is detached
         // pthread_join(w->thread, NULL);
 
-        w->obsolete = 1;
+        WEB_CLIENT_IS_OBSOLETE(w);
     }
 
     int i;
@@ -635,6 +635,7 @@ int main(int argc, char **argv) {
                         char* debug_flags_string = "debug_flags=";
 
                         if(strcmp(optarg, "unittest") == 0) {
+                            if(unit_test_buffer()) exit(1);
                             if(unit_test_str2ld()) exit(1);
                             //default_rrd_update_every = 1;
                             //default_rrd_memory_mode = RRD_MEMORY_MODE_RAM;
@@ -854,47 +855,10 @@ int main(int argc, char **argv) {
 
         // block signals while initializing threads.
         // this causes the threads to block signals.
-        sigset_t sigset;
-        sigfillset(&sigset);
-        if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1)
-            error("Could not block signals for threads");
+        signals_block();
 
-        // Catch signals which we want to use
-        struct sigaction sa;
-        sa.sa_flags = 0;
-
-        // ingore all signals while we run in a signal handler
-        sigfillset(&sa.sa_mask);
-
-        // INFO: If we add signals here we have to unblock them
-        // at popen.c when running a external plugin.
-
-        // Ignore SIGPIPE completely.
-        sa.sa_handler = SIG_IGN;
-        if(sigaction(SIGPIPE, &sa, NULL) == -1)
-            error("Failed to change signal handler for SIGPIPE");
-
-        sa.sa_handler = sig_handler_exit;
-        if(sigaction(SIGINT, &sa, NULL) == -1)
-            error("Failed to change signal handler for SIGINT");
-
-        sa.sa_handler = sig_handler_exit;
-        if(sigaction(SIGTERM, &sa, NULL) == -1)
-            error("Failed to change signal handler for SIGTERM");
-
-        sa.sa_handler = sig_handler_logrotate;
-        if(sigaction(SIGHUP, &sa, NULL) == -1)
-            error("Failed to change signal handler for SIGHUP");
-
-        // save database on SIGUSR1
-        sa.sa_handler = sig_handler_save;
-        if(sigaction(SIGUSR1, &sa, NULL) == -1)
-            error("Failed to change signal handler for SIGUSR1");
-
-        // reload health configuration on SIGUSR2
-        sa.sa_handler = sig_handler_reload_health;
-        if(sigaction(SIGUSR2, &sa, NULL) == -1)
-            error("Failed to change signal handler for SIGUSR2");
+        // setup the signals we want to use
+        signals_init();
 
 
         // --------------------------------------------------------------------
@@ -939,11 +903,6 @@ int main(int argc, char **argv) {
             user = config_get(CONFIG_SECTION_GLOBAL, "run as user", (passwd && passwd->pw_name)?passwd->pw_name:"");
         }
 
-        // IMPORTANT: these have to run once, while single threaded
-        web_files_uid(); // IMPORTANT: web_files_uid() before web_files_gid()
-        web_files_gid();
-
-
         // --------------------------------------------------------------------
         // create the listening sockets
 
@@ -974,6 +933,11 @@ int main(int argc, char **argv) {
 
     info("netdata started on pid %d.", getpid());
 
+    // IMPORTANT: these have to run once, while single threaded
+    // but after we have switched user
+    web_files_uid();
+    web_files_gid();
+
 
     // ------------------------------------------------------------------------
     // set default pthread stack size - after we have forked
@@ -1025,21 +989,12 @@ int main(int argc, char **argv) {
 
 
     // ------------------------------------------------------------------------
-    // block signals while initializing threads.
-    sigset_t sigset;
-    sigfillset(&sigset);
+    // unblock signals
 
-    if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) {
-        error("Could not unblock signals for threads");
-    }
+    signals_unblock();
 
-    // Handle flags set in the signal handler.
-    while(1) {
-        pause();
-        if(netdata_exit) {
-            debug(D_EXIT, "Exit main loop of netdata.");
-            netdata_cleanup_and_exit(0);
-            exit(0);
-        }
-    }
+    // ------------------------------------------------------------------------
+    // Handle signals
+
+    signals_handle();
 }
diff --git a/src/plugin_freebsd.c b/src/plugin_freebsd.c
index 020fdb41..c09b28a5 100644
--- a/src/plugin_freebsd.c
+++ b/src/plugin_freebsd.c
@@ -36,6 +36,7 @@ static struct freebsd_module {
 
         // CPU metrics
         { .name = "kern.cp_times",         .dim = "cp_times",       .enabled = 1, .func = do_kern_cp_times },
+        { .name = "dev.cpu.temperature",   .dim = "cpu_temperature", .enabled = 1, .func = do_dev_cpu_temperature },
 
         // disk metrics
         { .name = "kern.devstat",          .dim = "kern_devstat",   .enabled = 1, .func = do_kern_devstat },
diff --git a/src/plugin_freebsd.h b/src/plugin_freebsd.h
index 541bf852..78fe33d7 100644
--- a/src/plugin_freebsd.h
+++ b/src/plugin_freebsd.h
@@ -17,6 +17,7 @@ extern int do_vm_loadavg(int update_every, usec_t dt);
 extern int do_vm_vmtotal(int update_every, usec_t dt);
 extern int do_kern_cp_time(int update_every, usec_t dt);
 extern int do_kern_cp_times(int update_every, usec_t dt);
+extern int do_dev_cpu_temperature(int update_every, usec_t dt);
 extern int do_hw_intcnt(int update_every, usec_t dt);
 extern int do_vm_stats_sys_v_intr(int update_every, usec_t dt);
 extern int do_vm_stats_sys_v_soft(int update_every, usec_t dt);
diff --git a/src/plugin_proc.h b/src/plugin_proc.h
index 688b23de..72cfc6aa 100644
--- a/src/plugin_proc.h
+++ b/src/plugin_proc.h
@@ -32,4 +32,8 @@ extern int get_numa_node_count(void);
 // metrics that need to be shared among data collectors
 extern unsigned long long tcpext_TCPSynRetrans;
 
+// netdev renames
+extern void netdev_rename_device_add(const char *host_device, const char *container_device, const char *container_name);
+extern void netdev_rename_device_del(const char *host_device);
+
 #endif /* NETDATA_PLUGIN_PROC_H */
diff --git a/src/plugin_proc_diskspace.c b/src/plugin_proc_diskspace.c
index 750086a2..52c1f5ae 100644
--- a/src/plugin_proc_diskspace.c
+++ b/src/plugin_proc_diskspace.c
@@ -6,6 +6,7 @@
 
 static struct mountinfo *disk_mountinfo_root = NULL;
 static int check_for_new_mountpoints_every = 15;
+static int cleanup_mount_points = 1;
 
 static inline void mountinfo_reload(int force) {
     static time_t last_loaded = 0;
@@ -58,7 +59,7 @@ int mount_point_cleanup(void *entry, void *data) {
         return 0;
     }
 
-    if(likely(mp->collected)) {
+    if(likely(cleanup_mount_points && mp->collected)) {
         mp->collected = 0;
         mp->updated = 0;
         mp->shown_error = 0;
@@ -328,6 +329,8 @@ void *proc_diskspace_main(void *ptr) {
 
     int vdo_cpu_netdata = config_get_boolean("plugin:proc", "netdata server resources", 1);
 
+    cleanup_mount_points = config_get_boolean(CONFIG_SECTION_DISKSPACE, "remove charts of unmounted disks" , cleanup_mount_points);
+
     int update_every = (int)config_get_number(CONFIG_SECTION_DISKSPACE, "update every", localhost->rrd_update_every);
     if(update_every < localhost->rrd_update_every)
         update_every = localhost->rrd_update_every;
@@ -370,7 +373,8 @@ void *proc_diskspace_main(void *ptr) {
 
         if(unlikely(netdata_exit)) break;
 
-        dictionary_get_all(dict_mountpoints, mount_point_cleanup, NULL);
+        if(dict_mountpoints)
+            dictionary_get_all(dict_mountpoints, mount_point_cleanup, NULL);
 
         if(vdo_cpu_netdata) {
             static RRDSET *stcpu_thread = NULL, *st_duration = NULL;
diff --git a/src/plugin_tc.c b/src/plugin_tc.c
index 6bf5782a..c928e61b 100644
--- a/src/plugin_tc.c
+++ b/src/plugin_tc.c
@@ -392,7 +392,7 @@ static inline void tc_device_commit(struct tc_device *d) {
             if(unlikely(!c->render)) continue;
 
             if(unlikely(!c->rd_bytes))
-                c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
+                c->rd_bytes = rrddim_add(d->st_bytes, c->id, c->name?c->name:c->id, 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
             else if(unlikely(c->name_updated))
                 rrddim_set_name(d->st_bytes, c->rd_bytes, c->name);
 
diff --git a/src/plugins_d.c b/src/plugins_d.c
index 9eb10277..42433b55 100644
--- a/src/plugins_d.c
+++ b/src/plugins_d.c
@@ -217,47 +217,63 @@ inline size_t pluginsd_process(RRDHOST *host, struct plugind *cd, FILE *fp, int
             st = NULL;
         }
         else if(likely(hash == CHART_HASH && !strcmp(s, PLUGINSD_KEYWORD_CHART))) {
-            int noname = 0;
             st = NULL;
 
-            if((words[1]) != NULL && (words[2]) != NULL && strcmp(words[1], words[2]) == 0)
-                noname = 1;
+            char *type           = words[1];
+            char *name           = words[2];
+            char *title          = words[3];
+            char *units          = words[4];
+            char *family         = words[5];
+            char *context        = words[6];
+            char *chart          = words[7];
+            char *priority_s     = words[8];
+            char *update_every_s = words[9];
+            char *options        = words[10];
 
-            char *type = words[1];
+            // parse the id from type
             char *id = NULL;
-            if(likely(type)) {
-                id = strchr(type, '.');
-                if(likely(id)) { *id = '\0'; id++; }
+            if(likely(type && (id = strchr(type, '.')))) {
+                *id = '\0';
+                id++;
             }
-            char *name = words[2];
-            char *title = words[3];
-            char *units = words[4];
-            char *family = words[5];
-            char *context = words[6];
-            char *chart = words[7];
-            char *priority_s = words[8];
-            char *update_every_s = words[9];
-            char *options = words[10];
 
+            // make sure we have the required variables
             if(unlikely(!type || !*type || !id || !*id)) {
                 error("PLUGINSD: '%s' is requesting a CHART, without a type.id, on host '%s'. Disabling it.", cd->fullfilename, host->hostname);
                 enabled = 0;
                 break;
             }
 
+            // parse the name, and make sure it does not include 'type.'
+            if(unlikely(name && *name)) {
+                // when data are coming from slaves
+                // name will be type.name
+                // so we have to remove 'type.' from name too
+                size_t len = strlen(type);
+                if(strncmp(type, name, len) == 0 && name[len] == '.')
+                    name = &name[len + 1];
+
+                // if the name is the same with the id,
+                // or is just 'NULL', clear it.
+                if(unlikely(strcmp(name, id) == 0 || strcasecmp(name, "NULL") == 0 || strcasecmp(name, "(NULL)") == 0))
+                    name = NULL;
+            }
+
             int priority = 1000;
-            if(likely(priority_s)) priority = str2i(priority_s);
+            if(likely(priority_s && *priority_s)) priority = str2i(priority_s);
 
             int update_every = cd->update_every;
-            if(likely(update_every_s)) update_every = str2i(update_every_s);
+            if(likely(update_every_s && *update_every_s)) update_every = str2i(update_every_s);
             if(unlikely(!update_every)) update_every = cd->update_every;
 
             RRDSET_TYPE chart_type = RRDSET_TYPE_LINE;
             if(unlikely(chart)) chart_type = rrdset_type_id(chart);
 
-            if(unlikely(noname || !name || !*name || strcasecmp(name, "NULL") == 0 || strcasecmp(name, "(NULL)") == 0)) name = NULL;
-            if(unlikely(!family || !*family)) family = NULL;
-            if(unlikely(!context || !*context)) context = NULL;
+            if(unlikely(name && !*name)) name = NULL;
+            if(unlikely(family && !*family)) family = NULL;
+            if(unlikely(context && !*context)) context = NULL;
+            if(unlikely(!title)) title = "";
+            if(unlikely(!units)) units = "unknown";
 
             st = rrdset_find_bytype(host, type, id);
             if(unlikely(!st)) {
diff --git a/src/popen.c b/src/popen.c
index 8448b731..27be6177 100644
--- a/src/popen.c
+++ b/src/popen.c
@@ -105,38 +105,8 @@ FILE *mypopen(const char *command, pid_t *pidptr)
 #endif
 
     // reset all signals
-    {
-        sigset_t sigset;
-        sigfillset(&sigset);
-
-        if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1)
-            error("pre-execution of command '%s' on pid %d: could not unblock signals for threads.", command, getpid());
-        
-        // We only need to reset ignored signals.
-        // Signals with signal handlers are reset by default.
-        struct sigaction sa;
-        sigemptyset(&sa.sa_mask);
-        sa.sa_handler = SIG_DFL;
-        sa.sa_flags = 0;
-
-        if(sigaction(SIGINT, &sa, NULL) == -1)
-            error("pre-execution of command '%s' on pid %d: failed to set default signal handler for SIGINT.", command, getpid());
-
-        if(sigaction(SIGTERM, &sa, NULL) == -1)
-            error("pre-execution of command '%s' on pid %d: failed to set default signal handler for SIGTERM.", command, getpid());
-
-        if(sigaction(SIGPIPE, &sa, NULL) == -1)
-            error("pre-execution of command '%s' on pid %d: failed to set default signal handler for SIGPIPE.", command, getpid());
-
-        if(sigaction(SIGHUP, &sa, NULL) == -1)
-            error("pre-execution of command '%s' on pid %d: failed to set default signal handler for SIGHUP.", command, getpid());
-
-        if(sigaction(SIGUSR1, &sa, NULL) == -1)
-            error("pre-execution of command '%s' on pid %d: failed to set default signal handler for SIGUSR1.", command, getpid());
-
-        if(sigaction(SIGUSR2, &sa, NULL) == -1)
-            error("pre-execution of command '%s' on pid %d: failed to set default signal handler for SIGUSR2.", command, getpid());
-    }
+    signals_unblock();
+    signals_reset();
 
     debug(D_CHILDS, "executing command: '%s' on pid %d.", command, getpid());
     execl("/bin/sh", "sh", "-c", command, NULL);
diff --git a/src/proc_diskstats.c b/src/proc_diskstats.c
index d3fed5a6..4a32ec94 100644
--- a/src/proc_diskstats.c
+++ b/src/proc_diskstats.c
@@ -273,7 +273,8 @@ int do_proc_diskstats(int update_every, usec_t dt) {
                 global_do_qops = CONFIG_BOOLEAN_AUTO,
                 global_do_util = CONFIG_BOOLEAN_AUTO,
                 global_do_backlog = CONFIG_BOOLEAN_AUTO,
-                globals_initialized = 0;
+                globals_initialized = 0,
+                global_cleanup_removed_disks = 1;
 
     if(unlikely(!globals_initialized)) {
         globals_initialized = 1;
@@ -291,6 +292,8 @@ int do_proc_diskstats(int update_every, usec_t dt) {
         global_do_util    = config_get_boolean_ondemand(CONFIG_SECTION_DISKSTATS, "utilization percentage for all disks", global_do_util);
         global_do_backlog = config_get_boolean_ondemand(CONFIG_SECTION_DISKSTATS, "backlog for all disks", global_do_backlog);
 
+        global_cleanup_removed_disks = config_get_boolean(CONFIG_SECTION_DISKSTATS, "remove charts of removed disks" , global_cleanup_removed_disks);
+        
         char buffer[FILENAME_MAX + 1];
 
         snprintfz(buffer, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/dev/block/%lu:%lu/%s");
@@ -806,7 +809,7 @@ int do_proc_diskstats(int update_every, usec_t dt) {
 
     struct disk *d = disk_root, *last = NULL;
     while(d) {
-        if(unlikely(!d->updated)) {
+        if(unlikely(global_cleanup_removed_disks && !d->updated)) {
             struct disk *t = d;
 
             rrdset_obsolete_and_pointer_null(d->st_avgsz);
diff --git a/src/proc_interrupts.c b/src/proc_interrupts.c
index 082e1f57..b9f3941d 100644
--- a/src/proc_interrupts.c
+++ b/src/proc_interrupts.c
@@ -18,10 +18,10 @@ struct interrupt {
 
 // since each interrupt is variable in size
 // we use this to calculate its record size
-#define recordsize(cpus) (sizeof(struct interrupt) + (cpus * sizeof(struct cpu_interrupt)))
+#define recordsize(cpus) (sizeof(struct interrupt) + ((cpus) * sizeof(struct cpu_interrupt)))
 
 // given a base, get a pointer to each record
-#define irrindex(base, line, cpus) ((struct interrupt *)&((char *)(base))[line * recordsize(cpus)])
+#define irrindex(base, line, cpus) ((struct interrupt *)&((char *)(base))[(line) * recordsize(cpus)])
 
 static inline struct interrupt *get_interrupts_array(size_t lines, int cpus) {
     static struct interrupt *irrs = NULL;
@@ -142,68 +142,106 @@ int do_proc_interrupts(int update_every, usec_t dt) {
         irr->used = 1;
     }
 
-    RRDSET *st;
-
     // --------------------------------------------------------------------
 
-    st = rrdset_find_bytype_localhost("system", "interrupts");
-    if(unlikely(!st)) st = rrdset_create_localhost("system", "interrupts", NULL, "interrupts", NULL, "System interrupts"
-                                                   , "interrupts/s", 1000, update_every, RRDSET_TYPE_STACKED);
-    else rrdset_next(st);
+    static RRDSET *st_system_interrupts = NULL;
+    if(unlikely(!st_system_interrupts))
+        st_system_interrupts = rrdset_create_localhost(
+                "system"
+                , "interrupts"
+                , NULL
+                , "interrupts"
+                , NULL
+                , "System interrupts"
+                , "interrupts/s"
+                , 1000
+                , update_every
+                , RRDSET_TYPE_STACKED
+        );
+    else
+        rrdset_next(st_system_interrupts);
 
     for(l = 0; l < lines ;l++) {
         struct interrupt *irr = irrindex(irrs, l, cpus);
         if(unlikely(!irr->used)) continue;
+
         // some interrupt may have changed without changing the total number of lines
         // if the same number of interrupts have been added and removed between two
         // calls of this function.
         if(unlikely(!irr->rd || strncmp(irr->rd->name, irr->name, MAX_INTERRUPT_NAME) != 0)) {
-            irr->rd = rrddim_find(st, irr->id);
+            irr->rd = rrddim_find(st_system_interrupts, irr->id);
+
             if(unlikely(!irr->rd))
-                irr->rd = rrddim_add(st, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                irr->rd = rrddim_add(st_system_interrupts, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
             else
-                rrddim_set_name(st, irr->rd, irr->name);
+                rrddim_set_name(st_system_interrupts, irr->rd, irr->name);
 
             // also reset per cpu RRDDIMs to avoid repeating strncmp() in the per core loop
             if(likely(do_per_core)) {
                 int c;
-                for (c = 0; c < cpus ;c++)
-                    irr->cpu[c].rd = NULL;
+                for (c = 0; c < cpus ;c++) irr->cpu[c].rd = NULL;
             }
         }
-        rrddim_set_by_pointer(st, irr->rd, irr->total);
+
+        rrddim_set_by_pointer(st_system_interrupts, irr->rd, irr->total);
     }
-    rrdset_done(st);
+
+    rrdset_done(st_system_interrupts);
+
+    // --------------------------------------------------------------------
 
     if(likely(do_per_core)) {
+        static RRDSET **core_st = NULL;
+        static int old_cpus = 0;
+
+        if(old_cpus < cpus) {
+            core_st = reallocz(core_st, sizeof(RRDSET *) * cpus);
+            memset(&core_st[old_cpus], 0, sizeof(RRDSET *) * (cpus - old_cpus));
+            old_cpus = cpus;
+        }
+
         int c;
 
         for(c = 0; c < cpus ;c++) {
-            char id[50+1];
-            snprintfz(id, 50, "cpu%d_interrupts", c);
+            if(unlikely(!core_st[c])) {
+                char id[50+1];
+                snprintfz(id, 50, "cpu%d_interrupts", c);
 
-            st = rrdset_find_bytype_localhost("cpu", id);
-            if(unlikely(!st)) {
                 char title[100+1];
                 snprintfz(title, 100, "CPU%d Interrupts", c);
-                st = rrdset_create_localhost("cpu", id, NULL, "interrupts", "cpu.interrupts", title, "interrupts/s",
-                        1100 + c, update_every, RRDSET_TYPE_STACKED);
+                core_st[c] = rrdset_create_localhost(
+                        "cpu"
+                        , id
+                        , NULL
+                        , "interrupts"
+                        , "cpu.interrupts"
+                        , title
+                        , "interrupts/s"
+                        , 1100 + c
+                        , update_every
+                        , RRDSET_TYPE_STACKED
+                );
             }
-            else rrdset_next(st);
+            else rrdset_next(core_st[c]);
 
             for(l = 0; l < lines ;l++) {
                 struct interrupt *irr = irrindex(irrs, l, cpus);
+
                 if(unlikely(!irr->used)) continue;
+
                 if(unlikely(!irr->cpu[c].rd)) {
-                    irr->cpu[c].rd = rrddim_find(st, irr->id);
+                    irr->cpu[c].rd = rrddim_find(core_st[c], irr->id);
+
                     if(unlikely(!irr->cpu[c].rd))
-                        irr->cpu[c].rd = rrddim_add(st, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                        irr->cpu[c].rd = rrddim_add(core_st[c], irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
                     else
-                        rrddim_set_name(st, irr->cpu[c].rd, irr->name);
+                        rrddim_set_name(core_st[c], irr->cpu[c].rd, irr->name);
                 }
-                rrddim_set_by_pointer(st, irr->cpu[c].rd, irr->cpu[c].value);
+
+                rrddim_set_by_pointer(core_st[c], irr->cpu[c].rd, irr->cpu[c].value);
             }
-            rrdset_done(st);
+
+            rrdset_done(core_st[c]);
         }
     }
 
diff --git a/src/proc_loadavg.c b/src/proc_loadavg.c
index a48801b3..54fc545a 100644
--- a/src/proc_loadavg.c
+++ b/src/proc_loadavg.c
@@ -7,7 +7,6 @@ int do_proc_loadavg(int update_every, usec_t dt) {
     static procfile *ff = NULL;
     static int do_loadavg = -1, do_all_processes = -1;
     static usec_t next_loadavg_dt = 0;
-    static RRDSET *load_chart = NULL, *processes_chart = NULL;
 
     if(unlikely(!ff)) {
         char filename[FILENAME_MAX + 1];
@@ -49,24 +48,33 @@ int do_proc_loadavg(int update_every, usec_t dt) {
 
     if(next_loadavg_dt <= dt) {
         if(likely(do_loadavg)) {
+            static RRDSET *load_chart = NULL;
+            static RRDDIM *rd_load1 = NULL, *rd_load5 = NULL, *rd_load15 = NULL;
+
             if(unlikely(!load_chart)) {
-                load_chart = rrdset_find_byname_localhost("system.load");
-                if(unlikely(!load_chart)) {
-                    load_chart = rrdset_create_localhost("system", "load", NULL, "load", NULL, "System Load Average"
-                                                         , "load", 100, (update_every < MIN_LOADAVG_UPDATE_EVERY)
-                                                                        ? MIN_LOADAVG_UPDATE_EVERY : update_every
-                                                         , RRDSET_TYPE_LINE);
-                    rrddim_add(load_chart, "load1", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
-                    rrddim_add(load_chart, "load5", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
-                    rrddim_add(load_chart, "load15", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
-                }
+                load_chart = rrdset_create_localhost(
+                        "system"
+                        , "load"
+                        , NULL
+                        , "load"
+                        , NULL
+                        , "System Load Average"
+                        , "load"
+                        , 100
+                        , (update_every < MIN_LOADAVG_UPDATE_EVERY) ? MIN_LOADAVG_UPDATE_EVERY : update_every
+                        , RRDSET_TYPE_LINE
+                );
+
+                rd_load1  = rrddim_add(load_chart, "load1",  NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
+                rd_load5  = rrddim_add(load_chart, "load5",  NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
+                rd_load15 = rrddim_add(load_chart, "load15", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
             }
             else
                 rrdset_next(load_chart);
 
-            rrddim_set(load_chart, "load1", (collected_number) (load1 * 1000));
-            rrddim_set(load_chart, "load5", (collected_number) (load5 * 1000));
-            rrddim_set(load_chart, "load15", (collected_number) (load15 * 1000));
+            rrddim_set_by_pointer(load_chart, rd_load1, (collected_number) (load1 * 1000));
+            rrddim_set_by_pointer(load_chart, rd_load5, (collected_number) (load5 * 1000));
+            rrddim_set_by_pointer(load_chart, rd_load15, (collected_number) (load15 * 1000));
             rrdset_done(load_chart);
 
             next_loadavg_dt = load_chart->update_every * USEC_PER_SEC;
@@ -78,18 +86,28 @@ int do_proc_loadavg(int update_every, usec_t dt) {
     // --------------------------------------------------------------------
 
     if(likely(do_all_processes)) {
+        static RRDSET *processes_chart = NULL;
+        static RRDDIM *rd_active = NULL;
+
         if(unlikely(!processes_chart)) {
-            processes_chart = rrdset_find_byname_localhost("system.active_processes");
-            if(unlikely(!processes_chart)) {
-                processes_chart = rrdset_create_localhost("system", "active_processes", NULL, "processes", NULL
-                                                          , "System Active Processes", "processes", 750, update_every
-                                                          , RRDSET_TYPE_LINE);
-                rrddim_add(processes_chart, "active", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
-            }
+            processes_chart = rrdset_create_localhost(
+                    "system"
+                    , "active_processes"
+                    , NULL
+                    , "processes"
+                    , NULL
+                    , "System Active Processes"
+                    , "processes"
+                    , 750
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rd_active = rrddim_add(processes_chart, "active", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
         }
         else rrdset_next(processes_chart);
 
-        rrddim_set(processes_chart, "active", active_processes);
+        rrddim_set_by_pointer(processes_chart, rd_active, active_processes);
         rrdset_done(processes_chart);
     }
 
diff --git a/src/proc_meminfo.c b/src/proc_meminfo.c
index 6b0219cc..152a6366 100644
--- a/src/proc_meminfo.c
+++ b/src/proc_meminfo.c
@@ -132,54 +132,79 @@ int do_proc_meminfo(int update_every, usec_t dt) {
                 procfile_lineword(ff, l, 1)))) break;
     }
 
-    RRDSET *st;
-
     // --------------------------------------------------------------------
 
     // http://stackoverflow.com/questions/3019748/how-to-reliably-measure-available-memory-in-linux
     unsigned long long MemUsed = MemTotal - MemFree - Cached - Buffers;
 
     if(do_ram) {
-        st = rrdset_find_localhost("system.ram");
-        if(!st) {
-            st = rrdset_create_localhost("system", "ram", NULL, "ram", NULL, "System RAM", "MB", 200, update_every
-                                         , RRDSET_TYPE_STACKED);
-
-            rrddim_add(st, "free",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "used",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "cached",  NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "buffers", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+        static RRDSET *st_system_ram = NULL;
+        static RRDDIM *rd_free = NULL, *rd_used = NULL, *rd_cached = NULL, *rd_buffers = NULL;
+
+        if(unlikely(!st_system_ram)) {
+            st_system_ram = rrdset_create_localhost(
+                    "system"
+                    , "ram"
+                    , NULL
+                    , "ram"
+                    , NULL
+                    , "System RAM"
+                    , "MB"
+                    , 200
+                    , update_every
+                    , RRDSET_TYPE_STACKED
+            );
+
+            rd_free    = rrddim_add(st_system_ram, "free",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_used    = rrddim_add(st_system_ram, "used",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_cached  = rrddim_add(st_system_ram, "cached",  NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_buffers = rrddim_add(st_system_ram, "buffers", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
         }
-        else rrdset_next(st);
+        else rrdset_next(st_system_ram);
+
+        rrddim_set_by_pointer(st_system_ram, rd_free,    MemFree);
+        rrddim_set_by_pointer(st_system_ram, rd_used,    MemUsed);
+        rrddim_set_by_pointer(st_system_ram, rd_cached,  Cached);
+        rrddim_set_by_pointer(st_system_ram, rd_buffers, Buffers);
 
-        rrddim_set(st, "free", MemFree);
-        rrddim_set(st, "used", MemUsed);
-        rrddim_set(st, "cached", Cached);
-        rrddim_set(st, "buffers", Buffers);
-        rrdset_done(st);
+        rrdset_done(st_system_ram);
     }
 
     // --------------------------------------------------------------------
 
     unsigned long long SwapUsed = SwapTotal - SwapFree;
 
-    if(SwapTotal || SwapUsed || SwapFree || do_swap == CONFIG_BOOLEAN_YES) {
+    if(do_swap == CONFIG_BOOLEAN_YES || SwapTotal || SwapUsed || SwapFree) {
         do_swap = CONFIG_BOOLEAN_YES;
 
-        st = rrdset_find_localhost("system.swap");
-        if(!st) {
-            st = rrdset_create_localhost("system", "swap", NULL, "swap", NULL, "System Swap", "MB", 201, update_every
-                                         , RRDSET_TYPE_STACKED);
-            rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-            rrddim_add(st, "free",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "used",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+        static RRDSET *st_system_swap = NULL;
+        static RRDDIM *rd_free = NULL, *rd_used = NULL;
+
+        if(unlikely(!st_system_swap)) {
+            st_system_swap = rrdset_create_localhost(
+                    "system"
+                    , "swap"
+                    , NULL
+                    , "swap"
+                    , NULL
+                    , "System Swap"
+                    , "MB"
+                    , 201
+                    , update_every
+                    , RRDSET_TYPE_STACKED
+            );
+
+            rrdset_flag_set(st_system_swap, RRDSET_FLAG_DETAIL);
+
+            rd_free = rrddim_add(st_system_swap, "free",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_used = rrddim_add(st_system_swap, "used",    NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
         }
-        else rrdset_next(st);
+        else rrdset_next(st_system_swap);
 
-        rrddim_set(st, "used", SwapUsed);
-        rrddim_set(st, "free", SwapFree);
-        rrdset_done(st);
+        rrddim_set_by_pointer(st_system_swap, rd_used, SwapUsed);
+        rrddim_set_by_pointer(st_system_swap, rd_free, SwapFree);
+
+        rrdset_done(st_system_swap);
     }
 
     // --------------------------------------------------------------------
@@ -187,102 +212,171 @@ int do_proc_meminfo(int update_every, usec_t dt) {
     if(arl_hwcorrupted->flags & ARL_ENTRY_FLAG_FOUND && (do_hwcorrupt == CONFIG_BOOLEAN_YES || (do_hwcorrupt == CONFIG_BOOLEAN_AUTO && HardwareCorrupted > 0))) {
         do_hwcorrupt = CONFIG_BOOLEAN_YES;
 
-        st = rrdset_find_localhost("mem.hwcorrupt");
-        if(!st) {
-            st = rrdset_create_localhost("mem", "hwcorrupt", NULL, "ecc", NULL, "Hardware Corrupted ECC", "MB", 9000
-                                         , update_every, RRDSET_TYPE_LINE);
-            rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-            rrddim_add(st, "HardwareCorrupted", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+        static RRDSET *st_mem_hwcorrupt = NULL;
+        static RRDDIM *rd_corrupted = NULL;
+
+        if(unlikely(!st_mem_hwcorrupt)) {
+            st_mem_hwcorrupt = rrdset_create_localhost(
+                    "mem"
+                    , "hwcorrupt"
+                    , NULL
+                    , "ecc"
+                    , NULL
+                    , "Corrupted Memory, detected by ECC"
+                    , "MB"
+                    , 9000
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rrdset_flag_set(st_mem_hwcorrupt, RRDSET_FLAG_DETAIL);
+
+            rd_corrupted = rrddim_add(st_mem_hwcorrupt, "HardwareCorrupted", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
         }
-        else rrdset_next(st);
+        else rrdset_next(st_mem_hwcorrupt);
+
+        rrddim_set_by_pointer(st_mem_hwcorrupt, rd_corrupted, HardwareCorrupted);
 
-        rrddim_set(st, "HardwareCorrupted", HardwareCorrupted);
-        rrdset_done(st);
+        rrdset_done(st_mem_hwcorrupt);
     }
 
     // --------------------------------------------------------------------
 
     if(do_committed) {
-        st = rrdset_find_localhost("mem.committed");
-        if(!st) {
-            st = rrdset_create_localhost("mem", "committed", NULL, "system", NULL, "Committed (Allocated) Memory", "MB"
-                                         , 5000, update_every, RRDSET_TYPE_AREA);
-            rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-            rrddim_add(st, "Committed_AS", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+        static RRDSET *st_mem_committed = NULL;
+        static RRDDIM *rd_committed = NULL;
+
+        if(unlikely(!st_mem_committed)) {
+            st_mem_committed = rrdset_create_localhost(
+                    "mem"
+                    , "committed"
+                    , NULL
+                    , "system"
+                    , NULL
+                    , "Committed (Allocated) Memory"
+                    , "MB"
+                    , 5000
+                    , update_every
+                    , RRDSET_TYPE_AREA
+            );
+
+            rrdset_flag_set(st_mem_committed, RRDSET_FLAG_DETAIL);
+
+            rd_committed = rrddim_add(st_mem_committed, "Committed_AS", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
         }
-        else rrdset_next(st);
+        else rrdset_next(st_mem_committed);
+
+        rrddim_set_by_pointer(st_mem_committed, rd_committed, Committed_AS);
 
-        rrddim_set(st, "Committed_AS", Committed_AS);
-        rrdset_done(st);
+        rrdset_done(st_mem_committed);
     }
 
     // --------------------------------------------------------------------
 
     if(do_writeback) {
-        st = rrdset_find_localhost("mem.writeback");
-        if(!st) {
-            st = rrdset_create_localhost("mem", "writeback", NULL, "kernel", NULL, "Writeback Memory", "MB", 4000
-                                         , update_every, RRDSET_TYPE_LINE);
-            rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-            rrddim_add(st, "Dirty", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "Writeback", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "FuseWriteback", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "NfsWriteback", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "Bounce", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+        static RRDSET *st_mem_writeback = NULL;
+        static RRDDIM *rd_dirty = NULL, *rd_writeback = NULL, *rd_fusewriteback = NULL, *rd_nfs_writeback = NULL, *rd_bounce = NULL;
+
+        if(unlikely(!st_mem_writeback)) {
+            st_mem_writeback = rrdset_create_localhost(
+                    "mem"
+                    , "writeback"
+                    , NULL
+                    , "kernel"
+                    , NULL
+                    , "Writeback Memory"
+                    , "MB"
+                    , 4000
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+            rrdset_flag_set(st_mem_writeback, RRDSET_FLAG_DETAIL);
+
+            rd_dirty         = rrddim_add(st_mem_writeback, "Dirty",         NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_writeback     = rrddim_add(st_mem_writeback, "Writeback",     NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_fusewriteback = rrddim_add(st_mem_writeback, "FuseWriteback", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_nfs_writeback = rrddim_add(st_mem_writeback, "NfsWriteback",  NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_bounce        = rrddim_add(st_mem_writeback, "Bounce",        NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
         }
-        else rrdset_next(st);
-
-        rrddim_set(st, "Dirty", Dirty);
-        rrddim_set(st, "Writeback", Writeback);
-        rrddim_set(st, "FuseWriteback", WritebackTmp);
-        rrddim_set(st, "NfsWriteback", NFS_Unstable);
-        rrddim_set(st, "Bounce", Bounce);
-        rrdset_done(st);
+        else rrdset_next(st_mem_writeback);
+
+        rrddim_set_by_pointer(st_mem_writeback, rd_dirty,         Dirty);
+        rrddim_set_by_pointer(st_mem_writeback, rd_writeback,     Writeback);
+        rrddim_set_by_pointer(st_mem_writeback, rd_fusewriteback, WritebackTmp);
+        rrddim_set_by_pointer(st_mem_writeback, rd_nfs_writeback, NFS_Unstable);
+        rrddim_set_by_pointer(st_mem_writeback, rd_bounce,        Bounce);
+
+        rrdset_done(st_mem_writeback);
     }
 
     // --------------------------------------------------------------------
 
     if(do_kernel) {
-        st = rrdset_find_localhost("mem.kernel");
-        if(!st) {
-            st = rrdset_create_localhost("mem", "kernel", NULL, "kernel", NULL, "Memory Used by Kernel", "MB", 6000
-                                         , update_every, RRDSET_TYPE_STACKED);
-            rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-            rrddim_add(st, "Slab", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "KernelStack", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "PageTables", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "VmallocUsed", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+        static RRDSET *st_mem_kernel = NULL;
+        static RRDDIM *rd_slab = NULL, *rd_kernelstack = NULL, *rd_pagetables = NULL, *rd_vmallocused = NULL;
+
+        if(unlikely(!st_mem_kernel)) {
+            st_mem_kernel = rrdset_create_localhost(
+                    "mem"
+                    , "kernel"
+                    , NULL
+                    , "kernel"
+                    , NULL
+                    , "Memory Used by Kernel"
+                    , "MB"
+                    , 6000
+                    , update_every
+                    , RRDSET_TYPE_STACKED
+            );
+
+            rrdset_flag_set(st_mem_kernel, RRDSET_FLAG_DETAIL);
+
+            rd_slab        = rrddim_add(st_mem_kernel, "Slab",        NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_kernelstack = rrddim_add(st_mem_kernel, "KernelStack", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_pagetables  = rrddim_add(st_mem_kernel, "PageTables",  NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_vmallocused = rrddim_add(st_mem_kernel, "VmallocUsed", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
         }
-        else rrdset_next(st);
+        else rrdset_next(st_mem_kernel);
+
+        rrddim_set_by_pointer(st_mem_kernel, rd_slab,        Slab);
+        rrddim_set_by_pointer(st_mem_kernel, rd_kernelstack, KernelStack);
+        rrddim_set_by_pointer(st_mem_kernel, rd_pagetables,  PageTables);
+        rrddim_set_by_pointer(st_mem_kernel, rd_vmallocused, VmallocUsed);
 
-        rrddim_set(st, "KernelStack", KernelStack);
-        rrddim_set(st, "Slab", Slab);
-        rrddim_set(st, "PageTables", PageTables);
-        rrddim_set(st, "VmallocUsed", VmallocUsed);
-        rrdset_done(st);
+        rrdset_done(st_mem_kernel);
     }
 
     // --------------------------------------------------------------------
 
     if(do_slab) {
-        st = rrdset_find_localhost("mem.slab");
-        if(!st) {
-            st = rrdset_create_localhost("mem", "slab", NULL, "slab", NULL, "Reclaimable Kernel Memory", "MB", 6500
-                                         , update_every, RRDSET_TYPE_STACKED);
-            rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-            rrddim_add(st, "reclaimable", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "unreclaimable", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+        static RRDSET *st_mem_slab = NULL;
+        static RRDDIM *rd_reclaimable = NULL, *rd_unreclaimable = NULL;
+
+        if(unlikely(!st_mem_slab)) {
+            st_mem_slab = rrdset_create_localhost(
+                    "mem"
+                    , "slab"
+                    , NULL
+                    , "slab"
+                    , NULL
+                    , "Reclaimable Kernel Memory"
+                    , "MB"
+                    , 6500
+                    , update_every
+                    , RRDSET_TYPE_STACKED
+            );
+
+            rrdset_flag_set(st_mem_slab, RRDSET_FLAG_DETAIL);
+
+            rd_reclaimable   = rrddim_add(st_mem_slab, "reclaimable",   NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_unreclaimable = rrddim_add(st_mem_slab, "unreclaimable", NULL, 1, 1024, RRD_ALGORITHM_ABSOLUTE);
         }
-        else rrdset_next(st);
+        else rrdset_next(st_mem_slab);
+
+        rrddim_set_by_pointer(st_mem_slab, rd_reclaimable, SReclaimable);
+        rrddim_set_by_pointer(st_mem_slab, rd_unreclaimable, SUnreclaim);
 
-        rrddim_set(st, "reclaimable", SReclaimable);
-        rrddim_set(st, "unreclaimable", SUnreclaim);
-        rrdset_done(st);
+        rrdset_done(st_mem_slab);
     }
 
     return 0;
diff --git a/src/proc_net_dev.c b/src/proc_net_dev.c
index ee758899..6e12fc5d 100644
--- a/src/proc_net_dev.c
+++ b/src/proc_net_dev.c
@@ -1,6 +1,9 @@
 #include "common.h"
 
-struct netdev {
+// ----------------------------------------------------------------------------
+// netdev list
+
+static struct netdev {
     char *name;
     uint32_t hash;
     size_t len;
@@ -18,6 +21,27 @@ struct netdev {
     int do_compressed;
     int do_events;
 
+    const char *chart_type_net_bytes;
+    const char *chart_type_net_packets;
+    const char *chart_type_net_errors;
+    const char *chart_type_net_fifo;
+    const char *chart_type_net_events;
+    const char *chart_type_net_drops;
+    const char *chart_type_net_compressed;
+
+    const char *chart_id_net_bytes;
+    const char *chart_id_net_packets;
+    const char *chart_id_net_errors;
+    const char *chart_id_net_fifo;
+    const char *chart_id_net_events;
+    const char *chart_id_net_drops;
+    const char *chart_id_net_compressed;
+
+    const char *chart_family;
+
+    int flipped;
+    unsigned long priority;
+
     // data collected
     kernel_uint_t rbytes;
     kernel_uint_t rpackets;
@@ -66,13 +90,13 @@ struct netdev {
     RRDDIM *rd_tcompressed;
 
     struct netdev *next;
-};
-
-static struct netdev *netdev_root = NULL, *netdev_last_used = NULL;
+} *netdev_root = NULL, *netdev_last_used = NULL;
 
 static size_t netdev_added = 0, netdev_found = 0;
 
-static void netdev_free(struct netdev *d) {
+// ----------------------------------------------------------------------------
+
+static void netdev_charts_release(struct netdev *d) {
     if(d->st_bandwidth)  rrdset_is_obsolete(d->st_bandwidth);
     if(d->st_packets)    rrdset_is_obsolete(d->st_packets);
     if(d->st_errors)     rrdset_is_obsolete(d->st_errors);
@@ -81,11 +105,229 @@ static void netdev_free(struct netdev *d) {
     if(d->st_compressed) rrdset_is_obsolete(d->st_compressed);
     if(d->st_events)     rrdset_is_obsolete(d->st_events);
 
+    d->st_bandwidth   = NULL;
+    d->st_compressed  = NULL;
+    d->st_drops       = NULL;
+    d->st_errors      = NULL;
+    d->st_events      = NULL;
+    d->st_fifo        = NULL;
+    d->st_packets     = NULL;
+
+    d->rd_rbytes      = NULL;
+    d->rd_rpackets    = NULL;
+    d->rd_rerrors     = NULL;
+    d->rd_rdrops      = NULL;
+    d->rd_rfifo       = NULL;
+    d->rd_rframe      = NULL;
+    d->rd_rcompressed = NULL;
+    d->rd_rmulticast  = NULL;
+
+    d->rd_tbytes      = NULL;
+    d->rd_tpackets    = NULL;
+    d->rd_terrors     = NULL;
+    d->rd_tdrops      = NULL;
+    d->rd_tfifo       = NULL;
+    d->rd_tcollisions = NULL;
+    d->rd_tcarrier    = NULL;
+    d->rd_tcompressed = NULL;
+}
+
+static void netdev_free_strings(struct netdev *d) {
+    freez((void *)d->chart_type_net_bytes);
+    freez((void *)d->chart_type_net_compressed);
+    freez((void *)d->chart_type_net_drops);
+    freez((void *)d->chart_type_net_errors);
+    freez((void *)d->chart_type_net_events);
+    freez((void *)d->chart_type_net_fifo);
+    freez((void *)d->chart_type_net_packets);
+
+    freez((void *)d->chart_id_net_bytes);
+    freez((void *)d->chart_id_net_compressed);
+    freez((void *)d->chart_id_net_drops);
+    freez((void *)d->chart_id_net_errors);
+    freez((void *)d->chart_id_net_events);
+    freez((void *)d->chart_id_net_fifo);
+    freez((void *)d->chart_id_net_packets);
+
+    freez((void *)d->chart_family);
+}
+
+static void netdev_free(struct netdev *d) {
+    netdev_charts_release(d);
+    netdev_free_strings(d);
+
+    freez((void *)d->name);
+    freez((void *)d);
     netdev_added--;
-    freez(d->name);
-    freez(d);
 }
 
+
+// ----------------------------------------------------------------------------
+// netdev renames
+
+static struct netdev_rename {
+    const char *host_device;
+    uint32_t hash;
+
+    const char *container_device;
+    const char *container_name;
+
+    int processed;
+
+    struct netdev_rename *next;
+} *netdev_rename_root = NULL;
+
+static int netdev_pending_renames = 0;
+static netdata_mutex_t netdev_rename_mutex = NETDATA_MUTEX_INITIALIZER;
+
+static struct netdev_rename *netdev_rename_find(const char *host_device, uint32_t hash) {
+    struct netdev_rename *r;
+
+    for(r = netdev_rename_root; r ; r = r->next)
+        if(r->hash == hash && !strcmp(host_device, r->host_device))
+            return r;
+
+    return NULL;
+}
+
+// other threads can call this function to register a rename to a netdev
+void netdev_rename_device_add(const char *host_device, const char *container_device, const char *container_name) {
+    netdata_mutex_lock(&netdev_rename_mutex);
+
+    uint32_t hash = simple_hash(host_device);
+    struct netdev_rename *r = netdev_rename_find(host_device, hash);
+    if(!r) {
+        r = callocz(1, sizeof(struct netdev_rename));
+        r->host_device      = strdupz(host_device);
+        r->container_device = strdupz(container_device);
+        r->container_name   = strdupz(container_name);
+        r->hash             = hash;
+        r->next             = netdev_rename_root;
+        r->processed        = 0;
+        netdev_rename_root  = r;
+        netdev_pending_renames++;
+        info("CGROUP: registered network interface rename for '%s' as '%s' under '%s'", r->host_device, r->container_device, r->container_name);
+    }
+    else {
+        if(strcmp(r->container_device, container_device) != 0 || strcmp(r->container_name, container_name) != 0) {
+            freez((void *) r->container_device);
+            freez((void *) r->container_name);
+
+            r->container_device = strdupz(container_device);
+            r->container_name   = strdupz(container_name);
+            r->processed        = 0;
+            netdev_pending_renames++;
+            info("CGROUP: altered network interface rename for '%s' as '%s' under '%s'", r->host_device, r->container_device, r->container_name);
+        }
+    }
+
+    netdata_mutex_unlock(&netdev_rename_mutex);
+}
+
+// other threads can call this function to delete a rename to a netdev
+void netdev_rename_device_del(const char *host_device) {
+    netdata_mutex_lock(&netdev_rename_mutex);
+
+    struct netdev_rename *r, *last = NULL;
+
+    uint32_t hash = simple_hash(host_device);
+    for(r = netdev_rename_root; r ; last = r, r = r->next) {
+        if (r->hash == hash && !strcmp(host_device, r->host_device)) {
+            if (netdev_rename_root == r)
+                netdev_rename_root = r->next;
+            else if (last)
+                last->next = r->next;
+
+            if(!r->processed)
+                netdev_pending_renames--;
+
+            info("CGROUP: unregistered network interface rename for '%s' as '%s' under '%s'", r->host_device, r->container_device, r->container_name);
+
+            freez((void *) r->host_device);
+            freez((void *) r->container_name);
+            freez((void *) r->container_device);
+            freez((void *) r);
+            break;
+        }
+    }
+
+    netdata_mutex_unlock(&netdev_rename_mutex);
+}
+
+static inline void netdev_rename_cgroup(struct netdev *d, struct netdev_rename *r) {
+    info("CGROUP: renaming network interface '%s' as '%s' under '%s'", r->host_device, r->container_device, r->container_name);
+
+    netdev_charts_release(d);
+    netdev_free_strings(d);
+
+    char buffer[RRD_ID_LENGTH_MAX + 1];
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "cgroup_%s", r->container_name);
+    d->chart_type_net_bytes      = strdupz(buffer);
+    d->chart_type_net_compressed = strdupz(buffer);
+    d->chart_type_net_drops      = strdupz(buffer);
+    d->chart_type_net_errors     = strdupz(buffer);
+    d->chart_type_net_events     = strdupz(buffer);
+    d->chart_type_net_fifo       = strdupz(buffer);
+    d->chart_type_net_packets    = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net_%s", r->container_device);
+    d->chart_id_net_bytes      = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net_compressed_%s", r->container_device);
+    d->chart_id_net_compressed = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net_drops_%s", r->container_device);
+    d->chart_id_net_drops      = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net_errors_%s", r->container_device);
+    d->chart_id_net_errors     = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net_events_%s", r->container_device);
+    d->chart_id_net_events     = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net_fifo_%s", r->container_device);
+    d->chart_id_net_fifo       = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net_packets_%s", r->container_device);
+    d->chart_id_net_packets    = strdupz(buffer);
+
+    snprintfz(buffer, RRD_ID_LENGTH_MAX, "net %s", r->container_device);
+    d->chart_family = strdupz(buffer);
+
+    d->priority = 43000;
+    d->flipped = 1;
+}
+
+static inline void netdev_rename(struct netdev *d) {
+    struct netdev_rename *r = netdev_rename_find(d->name, d->hash);
+    if(unlikely(r && !r->processed)) {
+        netdev_rename_cgroup(d, r);
+        r->processed = 1;
+        netdev_pending_renames--;
+    }
+}
+
+static inline void netdev_rename_lock(struct netdev *d) {
+    netdata_mutex_lock(&netdev_rename_mutex);
+    netdev_rename(d);
+    netdata_mutex_unlock(&netdev_rename_mutex);
+}
+
+static inline void netdev_rename_all_lock(void) {
+    netdata_mutex_lock(&netdev_rename_mutex);
+
+    struct netdev *d;
+    for(d = netdev_root; d ; d = d->next)
+        netdev_rename(d);
+
+    netdev_pending_renames = 0;
+    netdata_mutex_unlock(&netdev_rename_mutex);
+}
+
+// ----------------------------------------------------------------------------
+// netdev data collection
+
 static void netdev_cleanup() {
     if(likely(netdev_found == netdev_added)) return;
 
@@ -144,6 +386,28 @@ static struct netdev *get_netdev(const char *name) {
     d->name = strdupz(name);
     d->hash = simple_hash(d->name);
     d->len = strlen(d->name);
+
+    d->chart_type_net_bytes      = strdupz("net");
+    d->chart_type_net_compressed = strdupz("net_compressed");
+    d->chart_type_net_drops      = strdupz("net_drops");
+    d->chart_type_net_errors     = strdupz("net_errors");
+    d->chart_type_net_events     = strdupz("net_events");
+    d->chart_type_net_fifo       = strdupz("net_fifo");
+    d->chart_type_net_packets    = strdupz("net_packets");
+
+    d->chart_id_net_bytes      = strdupz(d->name);
+    d->chart_id_net_compressed = strdupz(d->name);
+    d->chart_id_net_drops      = strdupz(d->name);
+    d->chart_id_net_errors     = strdupz(d->name);
+    d->chart_id_net_events     = strdupz(d->name);
+    d->chart_id_net_fifo       = strdupz(d->name);
+    d->chart_id_net_packets    = strdupz(d->name);
+
+    d->chart_family = strdupz(d->name);
+    d->priority = 7000;
+
+    netdev_rename_lock(d);
+
     netdev_added++;
 
     // link it to the end
@@ -176,9 +440,7 @@ int do_proc_net_dev(int update_every, usec_t dt) {
         do_compressed   = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "compressed packets for all interfaces", CONFIG_BOOLEAN_AUTO);
         do_events       = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "frames, collisions, carrier counters for all interfaces", CONFIG_BOOLEAN_AUTO);
 
-        disabled_list = simple_pattern_create(
-                config_get("plugin:proc:/proc/net/dev", "disable by default interfaces matching", "lo fireqos* *-ifb")
-                , SIMPLE_PATTERN_EXACT);
+        disabled_list = simple_pattern_create(config_get("plugin:proc:/proc/net/dev", "disable by default interfaces matching", "lo fireqos* *-ifb"), SIMPLE_PATTERN_EXACT);
     }
 
     if(unlikely(!ff)) {
@@ -191,6 +453,10 @@ int do_proc_net_dev(int update_every, usec_t dt) {
     ff = procfile_readall(ff);
     if(unlikely(!ff)) return 0; // we return 0, so that we will retry to open it next time
 
+    // rename all the devices, if we have pending renames
+    if(unlikely(netdev_pending_renames))
+        netdev_rename_all_lock();
+
     netdev_found = 0;
 
     size_t lines = procfile_lines(ff), l;
@@ -220,13 +486,13 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(d->enabled == CONFIG_BOOLEAN_NO)
                 continue;
 
-            d->do_bandwidth  = config_get_boolean_ondemand(var_name, "bandwidth", do_bandwidth);
-            d->do_packets    = config_get_boolean_ondemand(var_name, "packets", do_packets);
-            d->do_errors     = config_get_boolean_ondemand(var_name, "errors", do_errors);
-            d->do_drops      = config_get_boolean_ondemand(var_name, "drops", do_drops);
-            d->do_fifo       = config_get_boolean_ondemand(var_name, "fifo", do_fifo);
+            d->do_bandwidth  = config_get_boolean_ondemand(var_name, "bandwidth",  do_bandwidth);
+            d->do_packets    = config_get_boolean_ondemand(var_name, "packets",    do_packets);
+            d->do_errors     = config_get_boolean_ondemand(var_name, "errors",     do_errors);
+            d->do_drops      = config_get_boolean_ondemand(var_name, "drops",      do_drops);
+            d->do_fifo       = config_get_boolean_ondemand(var_name, "fifo",       do_fifo);
             d->do_compressed = config_get_boolean_ondemand(var_name, "compressed", do_compressed);
-            d->do_events     = config_get_boolean_ondemand(var_name, "events", do_events);
+            d->do_events     = config_get_boolean_ondemand(var_name, "events",     do_events);
         }
 
         if(unlikely(!d->enabled))
@@ -278,20 +544,28 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(unlikely(!d->st_bandwidth)) {
 
                 d->st_bandwidth = rrdset_create_localhost(
-                        "net"
-                        , d->name
+                        d->chart_type_net_bytes
+                        , d->chart_id_net_bytes
                         , NULL
-                        , d->name
+                        , d->chart_family
                         , "net.net"
                         , "Bandwidth"
                         , "kilobits/s"
-                        , 7000
+                        , d->priority
                         , update_every
                         , RRDSET_TYPE_AREA
                 );
 
-                d->rd_rbytes = rrddim_add(d->st_bandwidth, "received", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-                d->rd_tbytes = rrddim_add(d->st_bandwidth, "sent", NULL, -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rbytes = rrddim_add(d->st_bandwidth, "received", NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_tbytes = rrddim_add(d->st_bandwidth, "sent",     NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+
+                if(d->flipped) {
+                    // flip receive/trasmit
+
+                    RRDDIM *td = d->rd_rbytes;
+                    d->rd_rbytes = d->rd_tbytes;
+                    d->rd_tbytes = td;
+                }
             }
             else rrdset_next(d->st_bandwidth);
 
@@ -309,23 +583,31 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(unlikely(!d->st_packets)) {
 
                 d->st_packets = rrdset_create_localhost(
-                        "net_packets"
-                        , d->name
+                        d->chart_type_net_packets
+                        , d->chart_id_net_packets
                         , NULL
-                        , d->name
+                        , d->chart_family
                         , "net.packets"
                         , "Packets"
                         , "packets/s"
-                        , 7001
+                        , d->priority + 1
                         , update_every
                         , RRDSET_TYPE_LINE
                 );
 
                 rrdset_flag_set(d->st_packets, RRDSET_FLAG_DETAIL);
 
-                d->rd_rpackets = rrddim_add(d->st_packets, "received", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                d->rd_tpackets = rrddim_add(d->st_packets, "sent", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
-                d->rd_rmulticast = rrddim_add(d->st_packets, "multicast", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rpackets   = rrddim_add(d->st_packets, "received",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_tpackets   = rrddim_add(d->st_packets, "sent",      NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rmulticast = rrddim_add(d->st_packets, "multicast", NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                if(d->flipped) {
+                    // flip receive/trasmit
+
+                    RRDDIM *td = d->rd_rpackets;
+                    d->rd_rpackets = d->rd_tpackets;
+                    d->rd_tpackets = td;
+                }
             }
             else rrdset_next(d->st_packets);
 
@@ -344,22 +626,30 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(unlikely(!d->st_errors)) {
 
                 d->st_errors = rrdset_create_localhost(
-                        "net_errors"
-                        , d->name
+                        d->chart_type_net_errors
+                        , d->chart_id_net_errors
                         , NULL
-                        , d->name
+                        , d->chart_family
                         , "net.errors"
                         , "Interface Errors"
                         , "errors/s"
-                        , 7002
+                        , d->priority + 2
                         , update_every
                         , RRDSET_TYPE_LINE
                 );
 
                 rrdset_flag_set(d->st_errors, RRDSET_FLAG_DETAIL);
 
-                d->rd_rerrors = rrddim_add(d->st_errors, "inbound", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rerrors = rrddim_add(d->st_errors, "inbound",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
                 d->rd_terrors = rrddim_add(d->st_errors, "outbound", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                if(d->flipped) {
+                    // flip receive/trasmit
+
+                    RRDDIM *td = d->rd_rerrors;
+                    d->rd_rerrors = d->rd_terrors;
+                    d->rd_terrors = td;
+                }
             }
             else rrdset_next(d->st_errors);
 
@@ -377,22 +667,30 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(unlikely(!d->st_drops)) {
 
                 d->st_drops = rrdset_create_localhost(
-                        "net_drops"
-                        , d->name
+                        d->chart_type_net_drops
+                        , d->chart_id_net_drops
                         , NULL
-                        , d->name
+                        , d->chart_family
                         , "net.drops"
                         , "Interface Drops"
                         , "drops/s"
-                        , 7003
+                        , d->priority + 3
                         , update_every
                         , RRDSET_TYPE_LINE
                 );
 
                 rrdset_flag_set(d->st_drops, RRDSET_FLAG_DETAIL);
 
-                d->rd_rdrops = rrddim_add(d->st_drops, "inbound", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rdrops = rrddim_add(d->st_drops, "inbound",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
                 d->rd_tdrops = rrddim_add(d->st_drops, "outbound", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                if(d->flipped) {
+                    // flip receive/trasmit
+
+                    RRDDIM *td = d->rd_rdrops;
+                    d->rd_rdrops = d->rd_tdrops;
+                    d->rd_tdrops = td;
+                }
             }
             else rrdset_next(d->st_drops);
 
@@ -410,22 +708,30 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(unlikely(!d->st_fifo)) {
 
                 d->st_fifo = rrdset_create_localhost(
-                        "net_fifo"
-                        , d->name
+                        d->chart_type_net_fifo
+                        , d->chart_id_net_fifo
                         , NULL
-                        , d->name
+                        , d->chart_family
                         , "net.fifo"
                         , "Interface FIFO Buffer Errors"
                         , "errors"
-                        , 7004
+                        , d->priority + 4
                         , update_every
                         , RRDSET_TYPE_LINE
                 );
 
                 rrdset_flag_set(d->st_fifo, RRDSET_FLAG_DETAIL);
 
-                d->rd_rfifo = rrddim_add(d->st_fifo, "receive", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rfifo = rrddim_add(d->st_fifo, "receive",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
                 d->rd_tfifo = rrddim_add(d->st_fifo, "transmit", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                if(d->flipped) {
+                    // flip receive/trasmit
+
+                    RRDDIM *td = d->rd_rfifo;
+                    d->rd_rfifo = d->rd_tfifo;
+                    d->rd_tfifo = td;
+                }
             }
             else rrdset_next(d->st_fifo);
 
@@ -443,22 +749,30 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(unlikely(!d->st_compressed)) {
 
                 d->st_compressed = rrdset_create_localhost(
-                        "net_compressed"
-                        , d->name
+                        d->chart_type_net_compressed
+                        , d->chart_id_net_compressed
                         , NULL
-                        , d->name
+                        , d->chart_family
                         , "net.compressed"
                         , "Compressed Packets"
                         , "packets/s"
-                        , 7005
+                        , d->priority + 5
                         , update_every
                         , RRDSET_TYPE_LINE
                 );
 
                 rrdset_flag_set(d->st_compressed, RRDSET_FLAG_DETAIL);
 
-                d->rd_rcompressed = rrddim_add(d->st_compressed, "received", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                d->rd_tcompressed = rrddim_add(d->st_compressed, "sent", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rcompressed = rrddim_add(d->st_compressed, "received", NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_tcompressed = rrddim_add(d->st_compressed, "sent",     NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                if(d->flipped) {
+                    // flip receive/trasmit
+
+                    RRDDIM *td = d->rd_rcompressed;
+                    d->rd_rcompressed = d->rd_tcompressed;
+                    d->rd_tcompressed = td;
+                }
             }
             else rrdset_next(d->st_compressed);
 
@@ -476,23 +790,23 @@ int do_proc_net_dev(int update_every, usec_t dt) {
             if(unlikely(!d->st_events)) {
 
                 d->st_events = rrdset_create_localhost(
-                        "net_events"
-                        , d->name
+                        d->chart_type_net_events
+                        , d->chart_id_net_events
                         , NULL
-                        , d->name
+                        , d->chart_family
                         , "net.events"
                         , "Network Interface Events"
                         , "events/s"
-                        , 7006
+                        , d->priority + 6
                         , update_every
                         , RRDSET_TYPE_LINE
                 );
 
                 rrdset_flag_set(d->st_events, RRDSET_FLAG_DETAIL);
 
-                d->rd_rframe      = rrddim_add(d->st_events, "frames", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_rframe      = rrddim_add(d->st_events, "frames",     NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
                 d->rd_tcollisions = rrddim_add(d->st_events, "collisions", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
-                d->rd_tcarrier    = rrddim_add(d->st_events, "carrier", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+                d->rd_tcarrier    = rrddim_add(d->st_events, "carrier",    NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
             }
             else rrdset_next(d->st_events);
 
diff --git a/src/proc_net_ip_vs_stats.c b/src/proc_net_ip_vs_stats.c
index 16a3234d..aa806b46 100644
--- a/src/proc_net_ip_vs_stats.c
+++ b/src/proc_net_ip_vs_stats.c
@@ -80,8 +80,8 @@ int do_proc_net_ip_vs_stats(int update_every, usec_t dt) {
             st = rrdset_create_localhost(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, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st, "sent", NULL, -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "received", NULL, 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "sent", NULL,    -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st);
 
diff --git a/src/proc_net_netstat.c b/src/proc_net_netstat.c
index 322e51d1..e01b81d2 100644
--- a/src/proc_net_netstat.c
+++ b/src/proc_net_netstat.c
@@ -232,151 +232,255 @@ int do_proc_net_netstat(int update_every, usec_t dt) {
 
             parse_line_pair(ff, arl_ipext, h, l);
 
-            RRDSET *st;
-
             // --------------------------------------------------------------------
 
             if(do_bandwidth == CONFIG_BOOLEAN_YES || (do_bandwidth == CONFIG_BOOLEAN_AUTO && (ipext_InOctets || ipext_OutOctets))) {
                 do_bandwidth = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("system.ipv4");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("system", "ipv4", NULL, "network", NULL, "IPv4 Bandwidth", "kilobits/s"
-                                                 , 500, update_every, RRDSET_TYPE_AREA);
-
-                    rrddim_add(st, "InOctets", "received", 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "OutOctets", "sent", -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+                static RRDSET *st_system_ipv4 = NULL;
+                static RRDDIM *rd_in = NULL, *rd_out = NULL;
+
+                if(unlikely(!st_system_ipv4)) {
+                    st_system_ipv4 = rrdset_create_localhost(
+                            "system"
+                            , "ipv4"
+                            , NULL
+                            , "network"
+                            , NULL
+                            , "IPv4 Bandwidth"
+                            , "kilobits/s"
+                            , 500
+                            , update_every
+                            , RRDSET_TYPE_AREA
+                    );
+
+                    rd_in  = rrddim_add(st_system_ipv4, "InOctets",  "received", 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                    rd_out = rrddim_add(st_system_ipv4, "OutOctets", "sent",    -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_system_ipv4);
 
-                rrddim_set(st, "InOctets", ipext_InOctets);
-                rrddim_set(st, "OutOctets", ipext_OutOctets);
-                rrdset_done(st);
+                rrddim_set_by_pointer(st_system_ipv4, rd_in,  ipext_InOctets);
+                rrddim_set_by_pointer(st_system_ipv4, rd_out, ipext_OutOctets);
+
+                rrdset_done(st_system_ipv4);
             }
 
             // --------------------------------------------------------------------
 
             if(do_inerrors == CONFIG_BOOLEAN_YES || (do_inerrors == CONFIG_BOOLEAN_AUTO && (ipext_InNoRoutes || ipext_InTruncatedPkts))) {
                 do_inerrors = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.inerrors");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "inerrors", NULL, "errors", NULL, "IPv4 Input Errors"
-                                                 , "packets/s", 4000, update_every, RRDSET_TYPE_LINE);
-                    rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-                    rrddim_add(st, "InNoRoutes", "noroutes", 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "InTruncatedPkts", "truncated", 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "InCsumErrors", "checksum", 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                static RRDSET *st_ipv4_inerrors = NULL;
+                static RRDDIM *rd_noroutes = NULL, *rd_truncated = NULL, *rd_checksum = NULL;
+
+                if(unlikely(!st_ipv4_inerrors)) {
+                    st_ipv4_inerrors = rrdset_create_localhost(
+                            "ipv4"
+                            , "inerrors"
+                            , NULL
+                            , "errors"
+                            , NULL
+                            , "IPv4 Input Errors"
+                            , "packets/s"
+                            , 4000
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rrdset_flag_set(st_ipv4_inerrors, RRDSET_FLAG_DETAIL);
+
+                    rd_noroutes  = rrddim_add(st_ipv4_inerrors, "InNoRoutes",      "noroutes",  1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_truncated = rrddim_add(st_ipv4_inerrors, "InTruncatedPkts", "truncated", 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_checksum  = rrddim_add(st_ipv4_inerrors, "InCsumErrors",    "checksum",  1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_ipv4_inerrors);
+
+                rrddim_set_by_pointer(st_ipv4_inerrors, rd_noroutes,  ipext_InNoRoutes);
+                rrddim_set_by_pointer(st_ipv4_inerrors, rd_truncated, ipext_InTruncatedPkts);
+                rrddim_set_by_pointer(st_ipv4_inerrors, rd_checksum,  ipext_InCsumErrors);
 
-                rrddim_set(st, "InNoRoutes", ipext_InNoRoutes);
-                rrddim_set(st, "InTruncatedPkts", ipext_InTruncatedPkts);
-                rrddim_set(st, "InCsumErrors", ipext_InCsumErrors);
-                rrdset_done(st);
+                rrdset_done(st_ipv4_inerrors);
             }
 
             // --------------------------------------------------------------------
 
             if(do_mcast == CONFIG_BOOLEAN_YES || (do_mcast == CONFIG_BOOLEAN_AUTO && (ipext_InMcastOctets || ipext_OutMcastOctets))) {
                 do_mcast = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.mcast");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "mcast", NULL, "multicast", NULL, "IPv4 Multicast Bandwidth"
-                                                 , "kilobits/s", 9000, update_every, RRDSET_TYPE_AREA);
-                    rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-                    rrddim_add(st, "InMcastOctets", "received", 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "OutMcastOctets", "sent", -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+                static RRDSET *st_ipv4_mcast = NULL;
+                static RRDDIM *rd_in = NULL, *rd_out = NULL;
+
+                if(unlikely(!st_ipv4_mcast)) {
+                    st_ipv4_mcast = rrdset_create_localhost(
+                            "ipv4"
+                            , "mcast"
+                            , NULL
+                            , "multicast"
+                            , NULL
+                            , "IPv4 Multicast Bandwidth"
+                            , "kilobits/s"
+                            , 9000
+                            , update_every
+                            , RRDSET_TYPE_AREA
+                    );
+
+                    rrdset_flag_set(st_ipv4_mcast, RRDSET_FLAG_DETAIL);
+
+                    rd_in  = rrddim_add(st_ipv4_mcast, "InMcastOctets",  "received", 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                    rd_out = rrddim_add(st_ipv4_mcast, "OutMcastOctets", "sent",    -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_ipv4_mcast);
 
-                rrddim_set(st, "InMcastOctets", ipext_InMcastOctets);
-                rrddim_set(st, "OutMcastOctets", ipext_OutMcastOctets);
-                rrdset_done(st);
+                rrddim_set_by_pointer(st_ipv4_mcast, rd_in,  ipext_InMcastOctets);
+                rrddim_set_by_pointer(st_ipv4_mcast, rd_out, ipext_OutMcastOctets);
+
+                rrdset_done(st_ipv4_mcast);
             }
 
             // --------------------------------------------------------------------
 
             if(do_bcast == CONFIG_BOOLEAN_YES || (do_bcast == CONFIG_BOOLEAN_AUTO && (ipext_InBcastOctets || ipext_OutBcastOctets))) {
                 do_bcast = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.bcast");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "bcast", NULL, "broadcast", NULL, "IPv4 Broadcast Bandwidth"
-                                                 , "kilobits/s", 8000, update_every, RRDSET_TYPE_AREA);
-                    rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-                    rrddim_add(st, "InBcastOctets", "received", 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "OutBcastOctets", "sent", -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_ipv4_bcast = NULL;
+                static RRDDIM *rd_in = NULL, *rd_out = NULL;
+
+                if(unlikely(!st_ipv4_bcast)) {
+                    st_ipv4_bcast = rrdset_create_localhost(
+                            "ipv4"
+                            , "bcast"
+                            , NULL
+                            , "broadcast"
+                            , NULL
+                            , "IPv4 Broadcast Bandwidth"
+                            , "kilobits/s"
+                            , 8000
+                            , update_every
+                            , RRDSET_TYPE_AREA
+                    );
+
+                    rrdset_flag_set(st_ipv4_bcast, RRDSET_FLAG_DETAIL);
+
+                    rd_in  = rrddim_add(st_ipv4_bcast, "InBcastOctets",  "received", 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+                    rd_out = rrddim_add(st_ipv4_bcast, "OutBcastOctets", "sent",    -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_ipv4_bcast);
+
+                rrddim_set_by_pointer(st_ipv4_bcast, rd_in,  ipext_InBcastOctets);
+                rrddim_set_by_pointer(st_ipv4_bcast, rd_out, ipext_OutBcastOctets);
 
-                rrddim_set(st, "InBcastOctets", ipext_InBcastOctets);
-                rrddim_set(st, "OutBcastOctets", ipext_OutBcastOctets);
-                rrdset_done(st);
+                rrdset_done(st_ipv4_bcast);
             }
 
             // --------------------------------------------------------------------
 
             if(do_mcast_p == CONFIG_BOOLEAN_YES || (do_mcast_p == CONFIG_BOOLEAN_AUTO && (ipext_InMcastPkts || ipext_OutMcastPkts))) {
                 do_mcast_p = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.mcastpkts");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "mcastpkts", NULL, "multicast", NULL, "IPv4 Multicast Packets"
-                                                 , "packets/s", 8600, update_every, RRDSET_TYPE_LINE);
-                    rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-                    rrddim_add(st, "InMcastPkts", "received", 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "OutMcastPkts", "sent", -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_ipv4_mcastpkts = NULL;
+                static RRDDIM *rd_in = NULL, *rd_out = NULL;
+
+                if(unlikely(!st_ipv4_mcastpkts)) {
+                    st_ipv4_mcastpkts = rrdset_create_localhost(
+                            "ipv4"
+                            , "mcastpkts"
+                            , NULL
+                            , "multicast"
+                            , NULL
+                            , "IPv4 Multicast Packets"
+                            , "packets/s"
+                            , 8600
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rrdset_flag_set(st_ipv4_mcastpkts, RRDSET_FLAG_DETAIL);
+
+                    rd_in  = rrddim_add(st_ipv4_mcastpkts, "InMcastPkts",  "received", 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_out = rrddim_add(st_ipv4_mcastpkts, "OutMcastPkts", "sent",    -1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else rrdset_next(st_ipv4_mcastpkts);
+
+                rrddim_set_by_pointer(st_ipv4_mcastpkts, rd_in,  ipext_InMcastPkts);
+                rrddim_set_by_pointer(st_ipv4_mcastpkts, rd_out, ipext_OutMcastPkts);
 
-                rrddim_set(st, "InMcastPkts", ipext_InMcastPkts);
-                rrddim_set(st, "OutMcastPkts", ipext_OutMcastPkts);
-                rrdset_done(st);
+                rrdset_done(st_ipv4_mcastpkts);
             }
 
             // --------------------------------------------------------------------
 
             if(do_bcast_p == CONFIG_BOOLEAN_YES || (do_bcast_p == CONFIG_BOOLEAN_AUTO && (ipext_InBcastPkts || ipext_OutBcastPkts))) {
                 do_bcast_p = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.bcastpkts");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "bcastpkts", NULL, "broadcast", NULL, "IPv4 Broadcast Packets"
-                                                 , "packets/s", 8500, update_every, RRDSET_TYPE_LINE);
-                    rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-                    rrddim_add(st, "InBcastPkts", "received", 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "OutBcastPkts", "sent", -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_ipv4_bcastpkts = NULL;
+                static RRDDIM *rd_in = NULL, *rd_out = NULL;
+
+                if(unlikely(!st_ipv4_bcastpkts)) {
+                    st_ipv4_bcastpkts = rrdset_create_localhost(
+                            "ipv4"
+                            , "bcastpkts"
+                            , NULL
+                            , "broadcast"
+                            , NULL
+                            , "IPv4 Broadcast Packets"
+                            , "packets/s"
+                            , 8500
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rrdset_flag_set(st_ipv4_bcastpkts, RRDSET_FLAG_DETAIL);
+
+                    rd_in  = rrddim_add(st_ipv4_bcastpkts, "InBcastPkts",  "received", 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_out = rrddim_add(st_ipv4_bcastpkts, "OutBcastPkts", "sent",    -1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_ipv4_bcastpkts);
 
-                rrddim_set(st, "InBcastPkts", ipext_InBcastPkts);
-                rrddim_set(st, "OutBcastPkts", ipext_OutBcastPkts);
-                rrdset_done(st);
+                rrddim_set_by_pointer(st_ipv4_bcastpkts, rd_in,  ipext_InBcastPkts);
+                rrddim_set_by_pointer(st_ipv4_bcastpkts, rd_out, ipext_OutBcastPkts);
+
+                rrdset_done(st_ipv4_bcastpkts);
             }
 
             // --------------------------------------------------------------------
 
             if(do_ecn == CONFIG_BOOLEAN_YES || (do_ecn == CONFIG_BOOLEAN_AUTO && (ipext_InCEPkts || ipext_InECT0Pkts || ipext_InECT1Pkts || ipext_InNoECTPkts))) {
                 do_ecn = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.ecnpkts");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "ecnpkts", NULL, "ecn", NULL, "IPv4 ECN Statistics"
-                                                 , "packets/s", 8700, update_every, RRDSET_TYPE_LINE);
-                    rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-                    rrddim_add(st, "InCEPkts", "CEP", 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "InNoECTPkts", "NoECTP", -1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "InECT0Pkts", "ECTP0", 1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "InECT1Pkts", "ECTP1", 1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_ecnpkts = NULL;
+                static RRDDIM *rd_cep = NULL, *rd_noectp = NULL, *rd_ectp0 = NULL, *rd_ectp1 = NULL;
+
+                if(unlikely(!st_ecnpkts)) {
+                    st_ecnpkts = rrdset_create_localhost(
+                            "ipv4"
+                            , "ecnpkts"
+                            , NULL
+                            , "ecn"
+                            , NULL
+                            , "IPv4 ECN Statistics"
+                            , "packets/s"
+                            , 8700
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rrdset_flag_set(st_ecnpkts, RRDSET_FLAG_DETAIL);
+
+                    rd_cep    = rrddim_add(st_ecnpkts, "InCEPkts",    "CEP",     1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_noectp = rrddim_add(st_ecnpkts, "InNoECTPkts", "NoECTP", -1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_ectp0  = rrddim_add(st_ecnpkts, "InECT0Pkts",  "ECTP0",   1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_ectp1  = rrddim_add(st_ecnpkts, "InECT1Pkts",  "ECTP1",   1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else rrdset_next(st_ecnpkts);
+
+                rrddim_set_by_pointer(st_ecnpkts, rd_cep,    ipext_InCEPkts);
+                rrddim_set_by_pointer(st_ecnpkts, rd_noectp, ipext_InNoECTPkts);
+                rrddim_set_by_pointer(st_ecnpkts, rd_ectp0,  ipext_InECT0Pkts);
+                rrddim_set_by_pointer(st_ecnpkts, rd_ectp1,  ipext_InECT1Pkts);
 
-                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);
+                rrdset_done(st_ecnpkts);
             }
         }
         else if(unlikely(hash == hash_tcpext && strcmp(key, "TcpExt") == 0)) {
@@ -390,117 +494,192 @@ int do_proc_net_netstat(int update_every, usec_t dt) {
 
             parse_line_pair(ff, arl_tcpext, h, l);
 
-            RRDSET *st;
-
             // --------------------------------------------------------------------
 
             if(do_tcpext_memory == CONFIG_BOOLEAN_YES || (do_tcpext_memory == CONFIG_BOOLEAN_AUTO && (tcpext_TCPMemoryPressures))) {
                 do_tcpext_memory = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.tcpmemorypressures");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "tcpmemorypressures", NULL, "tcp", NULL, "TCP Memory Pressures"
-                                                 , "events/s", 3000, update_every, RRDSET_TYPE_LINE);
 
-                    rrddim_add(st, "TCPMemoryPressures",   "pressures",  1, 1, RRD_ALGORITHM_INCREMENTAL);
+                static RRDSET *st_tcpmemorypressures = NULL;
+                static RRDDIM *rd_pressures = NULL;
+
+                if(unlikely(!st_tcpmemorypressures)) {
+                    st_tcpmemorypressures = rrdset_create_localhost(
+                            "ipv4"
+                            , "tcpmemorypressures"
+                            , NULL
+                            , "tcp"
+                            , NULL
+                            , "TCP Memory Pressures"
+                            , "events/s"
+                            , 3000
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rd_pressures = rrddim_add(st_tcpmemorypressures, "TCPMemoryPressures",   "pressures",  1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_tcpmemorypressures);
+
+                rrddim_set_by_pointer(st_tcpmemorypressures, rd_pressures, tcpext_TCPMemoryPressures);
 
-                rrddim_set(st, "TCPMemoryPressures", tcpext_TCPMemoryPressures);
-                rrdset_done(st);
+                rrdset_done(st_tcpmemorypressures);
             }
 
             // --------------------------------------------------------------------
 
             if(do_tcpext_connaborts == CONFIG_BOOLEAN_YES || (do_tcpext_connaborts == CONFIG_BOOLEAN_AUTO && (tcpext_TCPAbortOnData || tcpext_TCPAbortOnClose || tcpext_TCPAbortOnMemory || tcpext_TCPAbortOnTimeout || tcpext_TCPAbortOnLinger || tcpext_TCPAbortFailed))) {
                 do_tcpext_connaborts = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.tcpconnaborts");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "tcpconnaborts", NULL, "tcp", NULL, "TCP Connection Aborts"
-                                                 , "connections/s", 3010, update_every, RRDSET_TYPE_LINE);
-
-                    rrddim_add(st, "TCPAbortOnData",    "baddata",     1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPAbortOnClose",   "userclosed",  1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPAbortOnMemory",  "nomemory",    1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPAbortOnTimeout", "timeout",     1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPAbortOnLinger",  "linger",      1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPAbortFailed",    "failed",     -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_tcpconnaborts = NULL;
+                static RRDDIM *rd_baddata = NULL, *rd_userclosed = NULL, *rd_nomemory = NULL, *rd_timeout = NULL, *rd_linger = NULL, *rd_failed = NULL;
+
+                if(unlikely(!st_tcpconnaborts)) {
+                    st_tcpconnaborts = rrdset_create_localhost(
+                            "ipv4"
+                            , "tcpconnaborts"
+                            , NULL
+                            , "tcp"
+                            , NULL
+                            , "TCP Connection Aborts"
+                            , "connections/s"
+                            , 3010
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rd_baddata    = rrddim_add(st_tcpconnaborts, "TCPAbortOnData",    "baddata",     1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_userclosed = rrddim_add(st_tcpconnaborts, "TCPAbortOnClose",   "userclosed",  1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_nomemory   = rrddim_add(st_tcpconnaborts, "TCPAbortOnMemory",  "nomemory",    1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_timeout    = rrddim_add(st_tcpconnaborts, "TCPAbortOnTimeout", "timeout",     1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_linger     = rrddim_add(st_tcpconnaborts, "TCPAbortOnLinger",  "linger",      1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_failed     = rrddim_add(st_tcpconnaborts, "TCPAbortFailed",    "failed",     -1, 1, RRD_ALGORITHM_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);
+                else
+                    rrdset_next(st_tcpconnaborts);
+
+                rrddim_set_by_pointer(st_tcpconnaborts, rd_baddata,    tcpext_TCPAbortOnData);
+                rrddim_set_by_pointer(st_tcpconnaborts, rd_userclosed, tcpext_TCPAbortOnClose);
+                rrddim_set_by_pointer(st_tcpconnaborts, rd_nomemory,   tcpext_TCPAbortOnMemory);
+                rrddim_set_by_pointer(st_tcpconnaborts, rd_timeout,    tcpext_TCPAbortOnTimeout);
+                rrddim_set_by_pointer(st_tcpconnaborts, rd_linger,     tcpext_TCPAbortOnLinger);
+                rrddim_set_by_pointer(st_tcpconnaborts, rd_failed,     tcpext_TCPAbortFailed);
+
+                rrdset_done(st_tcpconnaborts);
             }
+
             // --------------------------------------------------------------------
 
             if(do_tcpext_reorder == CONFIG_BOOLEAN_YES || (do_tcpext_reorder == CONFIG_BOOLEAN_AUTO && (tcpext_TCPRenoReorder || tcpext_TCPFACKReorder || tcpext_TCPSACKReorder || tcpext_TCPTSReorder))) {
                 do_tcpext_reorder = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.tcpreorders");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("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, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPSACKReorder", "sack",        1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPFACKReorder", "fack",        1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPRenoReorder", "reno",        1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_tcpreorders = NULL;
+                static RRDDIM *rd_timestamp = NULL, *rd_sack = NULL, *rd_fack = NULL, *rd_reno = NULL;
+
+                if(unlikely(!st_tcpreorders)) {
+                    st_tcpreorders = rrdset_create_localhost(
+                            "ipv4"
+                            , "tcpreorders"
+                            , NULL
+                            , "tcp"
+                            , NULL
+                            , "TCP Reordered Packets by Detection Method"
+                            , "packets/s"
+                            , 3020
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rd_timestamp = rrddim_add(st_tcpreorders, "TCPTSReorder",   "timestamp",   1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_sack      = rrddim_add(st_tcpreorders, "TCPSACKReorder", "sack",        1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_fack      = rrddim_add(st_tcpreorders, "TCPFACKReorder", "fack",        1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_reno      = rrddim_add(st_tcpreorders, "TCPRenoReorder", "reno",        1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_tcpreorders);
+
+                rrddim_set_by_pointer(st_tcpreorders, rd_timestamp, tcpext_TCPTSReorder);
+                rrddim_set_by_pointer(st_tcpreorders, rd_sack,      tcpext_TCPSACKReorder);
+                rrddim_set_by_pointer(st_tcpreorders, rd_fack,      tcpext_TCPFACKReorder);
+                rrddim_set_by_pointer(st_tcpreorders, rd_reno,      tcpext_TCPRenoReorder);
 
-                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);
+                rrdset_done(st_tcpreorders);
             }
 
             // --------------------------------------------------------------------
 
             if(do_tcpext_ofo == CONFIG_BOOLEAN_YES || (do_tcpext_ofo == CONFIG_BOOLEAN_AUTO && (tcpext_TCPOFOQueue || tcpext_TCPOFODrop || tcpext_TCPOFOMerge))) {
                 do_tcpext_ofo = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.tcpofo");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("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, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPOFODrop",  "dropped", -1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "TCPOFOMerge", "merged",   1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "OfoPruned",   "pruned",  -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_ipv4_tcpofo = NULL;
+                static RRDDIM *rd_inqueue = NULL, *rd_dropped = NULL, *rd_merged = NULL, *rd_pruned = NULL;
+
+                if(unlikely(!st_ipv4_tcpofo)) {
+
+                    st_ipv4_tcpofo = rrdset_create_localhost(
+                            "ipv4"
+                            , "tcpofo"
+                            , NULL
+                            , "tcp"
+                            , NULL
+                            , "TCP Out-Of-Order Queue"
+                            , "packets/s"
+                            , 3050
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rd_inqueue = rrddim_add(st_ipv4_tcpofo, "TCPOFOQueue", "inqueue",  1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_dropped = rrddim_add(st_ipv4_tcpofo, "TCPOFODrop",  "dropped", -1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_merged  = rrddim_add(st_ipv4_tcpofo, "TCPOFOMerge", "merged",   1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_pruned  = rrddim_add(st_ipv4_tcpofo, "OfoPruned",   "pruned",  -1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_ipv4_tcpofo);
 
-                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);
+                rrddim_set_by_pointer(st_ipv4_tcpofo, rd_inqueue, tcpext_TCPOFOQueue);
+                rrddim_set_by_pointer(st_ipv4_tcpofo, rd_dropped, tcpext_TCPOFODrop);
+                rrddim_set_by_pointer(st_ipv4_tcpofo, rd_merged,  tcpext_TCPOFOMerge);
+                rrddim_set_by_pointer(st_ipv4_tcpofo, rd_pruned,  tcpext_OfoPruned);
+
+                rrdset_done(st_ipv4_tcpofo);
             }
 
             // --------------------------------------------------------------------
 
             if(do_tcpext_syscookies == CONFIG_BOOLEAN_YES || (do_tcpext_syscookies == CONFIG_BOOLEAN_AUTO && (tcpext_SyncookiesSent || tcpext_SyncookiesRecv || tcpext_SyncookiesFailed))) {
                 do_tcpext_syscookies = CONFIG_BOOLEAN_YES;
-                st = rrdset_find_localhost("ipv4.tcpsyncookies");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("ipv4", "tcpsyncookies", NULL, "tcp", NULL, "TCP SYN Cookies"
-                                                 , "packets/s", 3100, update_every, RRDSET_TYPE_LINE);
-
-                    rrddim_add(st, "SyncookiesRecv",   "received",  1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "SyncookiesSent",   "sent",     -1, 1, RRD_ALGORITHM_INCREMENTAL);
-                    rrddim_add(st, "SyncookiesFailed", "failed",   -1, 1, RRD_ALGORITHM_INCREMENTAL);
+
+                static RRDSET *st_syncookies = NULL;
+                static RRDDIM *rd_received = NULL, *rd_sent = NULL, *rd_failed = NULL;
+
+                if(unlikely(!st_syncookies)) {
+
+                    st_syncookies = rrdset_create_localhost(
+                            "ipv4"
+                            , "tcpsyncookies"
+                            , NULL
+                            , "tcp"
+                            , NULL
+                            , "TCP SYN Cookies"
+                            , "packets/s"
+                            , 3100
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rd_received = rrddim_add(st_syncookies, "SyncookiesRecv",   "received",  1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_sent     = rrddim_add(st_syncookies, "SyncookiesSent",   "sent",     -1, 1, RRD_ALGORITHM_INCREMENTAL);
+                    rd_failed   = rrddim_add(st_syncookies, "SyncookiesFailed", "failed",   -1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else
+                    rrdset_next(st_syncookies);
+
+                rrddim_set_by_pointer(st_syncookies, rd_received, tcpext_SyncookiesRecv);
+                rrddim_set_by_pointer(st_syncookies, rd_sent,     tcpext_SyncookiesSent);
+                rrddim_set_by_pointer(st_syncookies, rd_failed,   tcpext_SyncookiesFailed);
 
-                rrddim_set(st, "SyncookiesRecv",   tcpext_SyncookiesRecv);
-                rrddim_set(st, "SyncookiesSent",   tcpext_SyncookiesSent);
-                rrddim_set(st, "SyncookiesFailed", tcpext_SyncookiesFailed);
-                rrdset_done(st);
+                rrdset_done(st_syncookies);
             }
 
         }
diff --git a/src/proc_net_snmp.c b/src/proc_net_snmp.c
index 7c0fd9b4..817c964b 100644
--- a/src/proc_net_snmp.c
+++ b/src/proc_net_snmp.c
@@ -554,7 +554,7 @@ int do_proc_net_snmp(int update_every, usec_t dt) {
 
                 st = rrdset_find_localhost(RRD_TYPE_NET_SNMP ".icmpmsg");
                 if(!st) {
-                    st = rrdset_create_localhost(RRD_TYPE_NET_SNMP, "icmpmsg", NULL, "icmp", NULL, "IPv4 ICMP Messsages"
+                    st = rrdset_create_localhost(RRD_TYPE_NET_SNMP, "icmpmsg", NULL, "icmp", NULL, "IPv4 ICMP Messages"
                                                  , "packets/s", 2604, update_every, RRDSET_TYPE_LINE);
 
                     for(i = 0; icmpmsg_data[i].name ;i++)
diff --git a/src/proc_net_snmp6.c b/src/proc_net_snmp6.c
index aa9ab220..6649b7af 100644
--- a/src/proc_net_snmp6.c
+++ b/src/proc_net_snmp6.c
@@ -283,8 +283,8 @@ int do_proc_net_snmp6(int update_every, usec_t dt) {
             st = rrdset_create_localhost("system", "ipv6", NULL, "network", NULL, "IPv6 Bandwidth", "kilobits/s", 500
                                          , update_every, RRDSET_TYPE_AREA);
 
-            rrddim_add(st, "received", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st, "sent", NULL, -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "received", NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "sent",     NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st);
 
@@ -536,8 +536,8 @@ int do_proc_net_snmp6(int update_every, usec_t dt) {
                                          , RRDSET_TYPE_AREA);
             rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
 
-            rrddim_add(st, "received", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st, "sent", NULL, -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "received", NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "sent",     NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st);
 
@@ -557,8 +557,8 @@ int do_proc_net_snmp6(int update_every, usec_t dt) {
                                          , RRDSET_TYPE_AREA);
             rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
 
-            rrddim_add(st, "received", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st, "sent", NULL, -8, 1024, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "received", NULL,  8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+            rrddim_add(st, "sent",     NULL, -8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st);
 
diff --git a/src/proc_softirqs.c b/src/proc_softirqs.c
index 560e2acb..352407a4 100644
--- a/src/proc_softirqs.c
+++ b/src/proc_softirqs.c
@@ -124,77 +124,120 @@ int do_proc_softirqs(int update_every, usec_t dt) {
         irr->used = 1;
     }
 
-    RRDSET *st;
-
     // --------------------------------------------------------------------
 
-    st = rrdset_find_bytype_localhost("system", "softirqs");
-    if(unlikely(!st)) st = rrdset_create_localhost("system", "softirqs", NULL, "softirqs", NULL, "System softirqs"
-                                                   , "softirqs/s", 950, update_every, RRDSET_TYPE_STACKED);
-    else rrdset_next(st);
+    static RRDSET *st_system_softirqs = NULL;
+    if(unlikely(!st_system_softirqs))
+        st_system_softirqs = rrdset_create_localhost(
+                "system"
+                , "softirqs"
+                , NULL
+                , "softirqs"
+                , NULL
+                , "System softirqs"
+                , "softirqs/s"
+                , 950
+                , update_every
+                , RRDSET_TYPE_STACKED
+        );
+    else
+        rrdset_next(st_system_softirqs);
 
     for(l = 0; l < lines ;l++) {
         struct interrupt *irr = irrindex(irrs, l, cpus);
+
         if(unlikely(!irr->used)) continue;
+
         // some interrupt may have changed without changing the total number of lines
         // if the same number of interrupts have been added and removed between two
         // calls of this function.
         if(unlikely(!irr->rd || strncmp(irr->name, irr->rd->name, MAX_INTERRUPT_NAME) != 0)) {
-            irr->rd = rrddim_find(st, irr->id);
+            irr->rd = rrddim_find(st_system_softirqs, irr->id);
+
             if(unlikely(!irr->rd))
-                irr->rd = rrddim_add(st, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                irr->rd = rrddim_add(st_system_softirqs, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
             else
-                rrddim_set_name(st, irr->rd, irr->name);
+                rrddim_set_name(st_system_softirqs, irr->rd, irr->name);
 
             // also reset per cpu RRDDIMs to avoid repeating strncmp() in the per core loop
             if(likely(do_per_core)) {
                 int c;
-                for (c = 0; c < cpus ;c++)
-                    irr->cpu[c].rd = NULL;
+                for (c = 0; c < cpus ;c++) irr->cpu[c].rd = NULL;
             }
         }
-        rrddim_set_by_pointer(st, irr->rd, irr->total);
+
+        rrddim_set_by_pointer(st_system_softirqs, irr->rd, irr->total);
     }
-    rrdset_done(st);
+
+    rrdset_done(st_system_softirqs);
+
+    // --------------------------------------------------------------------
 
     if(do_per_core) {
+        static RRDSET **core_st = NULL;
+        static int old_cpus = 0;
+
+        if(old_cpus < cpus) {
+            core_st = reallocz(core_st, sizeof(RRDSET *) * cpus);
+            memset(&core_st[old_cpus], 0, sizeof(RRDSET *) * (cpus - old_cpus));
+            old_cpus = cpus;
+        }
+
         int c;
 
         for(c = 0; c < cpus ; c++) {
-            char id[50+1];
-            snprintfz(id, 50, "cpu%d_softirqs", c);
-
-            st = rrdset_find_bytype_localhost("cpu", id);
-            if(unlikely(!st)) {
-                // find if everything is zero
-                unsigned long long core_sum = 0 ;
-                for(l = 0; l < lines ;l++) {
+            if(unlikely(!core_st[c])) {
+                // find if everything is just zero
+                unsigned long long core_sum = 0;
+
+                for (l = 0; l < lines; l++) {
                     struct interrupt *irr = irrindex(irrs, l, cpus);
-                    if(unlikely(!irr->used)) continue;
+                    if (unlikely(!irr->used)) continue;
                     core_sum += irr->cpu[c].value;
                 }
-                if(unlikely(core_sum == 0)) continue; // try next core
 
-                char title[100+1];
+                if (unlikely(core_sum == 0)) continue; // try next core
+
+                char id[50 + 1];
+                snprintfz(id, 50, "cpu%d_softirqs", c);
+
+                char title[100 + 1];
                 snprintfz(title, 100, "CPU%d softirqs", c);
-                st = rrdset_create_localhost("cpu", id, NULL, "softirqs", "cpu.softirqs", title, "softirqs/s", 3000 + c
-                                             , update_every, RRDSET_TYPE_STACKED);
+
+                core_st[c] = rrdset_create_localhost(
+                        "cpu"
+                        , id
+                        , NULL
+                        , "softirqs"
+                        , "cpu.softirqs"
+                        , title
+                        , "softirqs/s"
+                        , 3000 + c
+                        , update_every
+                        , RRDSET_TYPE_STACKED
+                );
             }
-            else rrdset_next(st);
+            else
+                rrdset_next(core_st[c]);
 
             for(l = 0; l < lines ;l++) {
                 struct interrupt *irr = irrindex(irrs, l, cpus);
+
                 if(unlikely(!irr->used)) continue;
+
                 if(unlikely(!irr->cpu[c].rd)) {
-                    irr->cpu[c].rd = rrddim_find(st, irr->id);
+                    irr->cpu[c].rd = rrddim_find(core_st[c], irr->id);
+
                     if(unlikely(!irr->cpu[c].rd))
-                        irr->cpu[c].rd = rrddim_add(st, irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                        irr->cpu[c].rd = rrddim_add(core_st[c], irr->id, irr->name, 1, 1, RRD_ALGORITHM_INCREMENTAL);
                     else
-                        rrddim_set_name(st, irr->cpu[c].rd, irr->name);
+                        rrddim_set_name(core_st[c], irr->cpu[c].rd, irr->name);
                 }
-                rrddim_set_by_pointer(st, irr->cpu[c].rd, irr->cpu[c].value);
+
+                rrddim_set_by_pointer(core_st[c], irr->cpu[c].rd, irr->cpu[c].value);
             }
-            rrdset_done(st);
+
+            rrdset_done(core_st[c]);
         }
     }
 
diff --git a/src/proc_stat.c b/src/proc_stat.c
index 04f0896c..40bf5cfa 100644
--- a/src/proc_stat.c
+++ b/src/proc_stat.c
@@ -1,25 +1,171 @@
 #include "common.h"
 
+struct per_core_single_number_file {
+    char found:1;
+    const char *filename;
+    int fd;
+    collected_number value;
+    RRDDIM *rd;
+};
+
+#define CORE_THROTTLE_COUNT_INDEX    0
+#define PACKAGE_THROTTLE_COUNT_INDEX 1
+#define SCALING_CUR_FREQ_INDEX       2
+#define PER_CORE_FILES               3
+
+struct cpu_chart {
+    const char *id;
+
+    RRDSET *st;
+    RRDDIM *rd_user;
+    RRDDIM *rd_nice;
+    RRDDIM *rd_system;
+    RRDDIM *rd_idle;
+    RRDDIM *rd_iowait;
+    RRDDIM *rd_irq;
+    RRDDIM *rd_softirq;
+    RRDDIM *rd_steal;
+    RRDDIM *rd_guest;
+    RRDDIM *rd_guest_nice;
+
+    struct per_core_single_number_file files[PER_CORE_FILES];
+};
+
+static int keep_per_core_fds_open = CONFIG_BOOLEAN_YES;
+
+static int read_per_core_files(struct cpu_chart *all_cpu_charts, size_t len, size_t index) {
+    char buf[50 + 1];
+    size_t x, files_read = 0, files_nonzero = 0;
+
+    for(x = 0; x < len ; x++) {
+        struct per_core_single_number_file *f = &all_cpu_charts[x].files[index];
+
+        f->found = 0;
+
+        if(unlikely(!f->filename))
+            continue;
+
+        if(unlikely(f->fd == -1)) {
+            f->fd = open(f->filename, O_RDONLY);
+            if (unlikely(f->fd == -1)) {
+                error("Cannot open file '%s'", f->filename);
+                continue;
+            }
+        }
+
+        ssize_t ret = read(f->fd, buf, 50);
+        if(unlikely(ret == -1)) {
+            // cannot read that file
+
+            error("Cannot read file '%s'", f->filename);
+            close(f->fd);
+            f->fd = -1;
+            continue;
+        }
+        else {
+            // successful read
+
+            // terminate the buffer
+            buf[ret] = '\0';
+
+            if(unlikely(keep_per_core_fds_open != CONFIG_BOOLEAN_YES)) {
+                close(f->fd);
+                f->fd = -1;
+            }
+            else if(lseek(f->fd, 0, SEEK_SET) == -1) {
+                error("Cannot seek in file '%s'", f->filename);
+                close(f->fd);
+                f->fd = -1;
+            }
+        }
+
+        files_read++;
+        f->found = 1;
+
+        f->value = str2ll(buf, NULL);
+        // info("read '%s', parsed as " COLLECTED_NUMBER_FORMAT, buf, f->value);
+        if(likely(f->value != 0))
+            files_nonzero++;
+    }
+
+    if(files_read == 0)
+        return -1;
+
+    if(files_nonzero == 0)
+        return 0;
+
+    return (int)files_nonzero;
+}
+
+static void chart_per_core_files(struct cpu_chart *all_cpu_charts, size_t len, size_t index, RRDSET *st, collected_number multiplier, collected_number divisor, RRD_ALGORITHM algorithm) {
+    size_t x;
+    for(x = 0; x < len ; x++) {
+        struct per_core_single_number_file *f = &all_cpu_charts[x].files[index];
+
+        if(unlikely(!f->found))
+            continue;
+
+        if(unlikely(!f->rd))
+            f->rd = rrddim_add(st, all_cpu_charts[x].id, NULL, multiplier, divisor, algorithm);
+
+        rrddim_set_by_pointer(st, f->rd, f->value);
+    }
+}
+
 int do_proc_stat(int update_every, usec_t dt) {
     (void)dt;
 
+    static struct cpu_chart *all_cpu_charts = NULL;
+    static size_t all_cpu_charts_size = 0;
     static procfile *ff = NULL;
-    static int do_cpu = -1, do_cpu_cores = -1, do_interrupts = -1, do_context = -1, do_forks = -1, do_processes = -1;
+    static int do_cpu = -1, do_cpu_cores = -1, do_interrupts = -1, do_context = -1, do_forks = -1, do_processes = -1, do_core_throttle_count = -1, do_package_throttle_count = -1, do_scaling_cur_freq = -1;
     static uint32_t hash_intr, hash_ctxt, hash_processes, hash_procs_running, hash_procs_blocked;
+    static char *core_throttle_count_filename = NULL, *package_throttle_count_filename = NULL, *scaling_cur_freq_filename = NULL;
 
     if(unlikely(do_cpu == -1)) {
-        do_cpu          = config_get_boolean("plugin:proc:/proc/stat", "cpu utilization", 1);
-        do_cpu_cores    = config_get_boolean("plugin:proc:/proc/stat", "per cpu core utilization", 1);
-        do_interrupts   = config_get_boolean("plugin:proc:/proc/stat", "cpu interrupts", 1);
-        do_context      = config_get_boolean("plugin:proc:/proc/stat", "context switches", 1);
-        do_forks        = config_get_boolean("plugin:proc:/proc/stat", "processes started", 1);
-        do_processes    = config_get_boolean("plugin:proc:/proc/stat", "processes running", 1);
+        do_cpu                    = config_get_boolean("plugin:proc:/proc/stat", "cpu utilization", CONFIG_BOOLEAN_YES);
+        do_cpu_cores              = config_get_boolean("plugin:proc:/proc/stat", "per cpu core utilization", CONFIG_BOOLEAN_YES);
+        do_interrupts             = config_get_boolean("plugin:proc:/proc/stat", "cpu interrupts", CONFIG_BOOLEAN_YES);
+        do_context                = config_get_boolean("plugin:proc:/proc/stat", "context switches", CONFIG_BOOLEAN_YES);
+        do_forks                  = config_get_boolean("plugin:proc:/proc/stat", "processes started", CONFIG_BOOLEAN_YES);
+        do_processes              = config_get_boolean("plugin:proc:/proc/stat", "processes running", CONFIG_BOOLEAN_YES);
+
+        // give sane defaults based on the number of processors
+        if(processors > 50) {
+            // the system has too many processors
+            keep_per_core_fds_open = CONFIG_BOOLEAN_NO;
+            do_core_throttle_count = CONFIG_BOOLEAN_NO;
+            do_package_throttle_count = CONFIG_BOOLEAN_NO;
+            do_scaling_cur_freq = CONFIG_BOOLEAN_NO;
+        }
+        else {
+            // the system has a reasonable number of processors
+            keep_per_core_fds_open = CONFIG_BOOLEAN_YES;
+            do_core_throttle_count = CONFIG_BOOLEAN_AUTO;
+            do_package_throttle_count = CONFIG_BOOLEAN_NO;
+            do_scaling_cur_freq = CONFIG_BOOLEAN_NO;
+        }
+
+        keep_per_core_fds_open    = config_get_boolean("plugin:proc:/proc/stat", "keep per core files open", keep_per_core_fds_open);
+        do_core_throttle_count    = config_get_boolean_ondemand("plugin:proc:/proc/stat", "core_throttle_count", do_core_throttle_count);
+        do_package_throttle_count = config_get_boolean_ondemand("plugin:proc:/proc/stat", "package_throttle_count", do_package_throttle_count);
+        do_scaling_cur_freq       = config_get_boolean_ondemand("plugin:proc:/proc/stat", "scaling_cur_freq", do_scaling_cur_freq);
 
         hash_intr = simple_hash("intr");
         hash_ctxt = simple_hash("ctxt");
         hash_processes = simple_hash("processes");
         hash_procs_running = simple_hash("procs_running");
         hash_procs_blocked = simple_hash("procs_blocked");
+
+        char filename[FILENAME_MAX + 1];
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/devices/system/cpu/%s/thermal_throttle/core_throttle_count");
+        core_throttle_count_filename = config_get("plugin:proc:/proc/stat", "core_throttle_count filename to monitor", filename);
+
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/devices/system/cpu/%s/thermal_throttle/package_throttle_count");
+        package_throttle_count_filename = config_get("plugin:proc:/proc/stat", "package_throttle_count filename to monitor", filename);
+
+        snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/devices/system/cpu/%s/cpufreq/scaling_cur_freq");
+        scaling_cur_freq_filename = config_get("plugin:proc:/proc/stat", "scaling_cur_freq filename to monitor", filename);
     }
 
     if(unlikely(!ff)) {
@@ -36,7 +182,6 @@ int do_proc_stat(int update_every, usec_t dt) {
     size_t words;
 
     unsigned long long processes = 0, running = 0 , blocked = 0;
-    RRDSET *st;
 
     for(l = 0; l < lines ;l++) {
         char *row_key = procfile_lineword(ff, l, 0);
@@ -50,120 +195,189 @@ int do_proc_stat(int update_every, usec_t dt) {
                 continue;
             }
 
-            char *id;
-            unsigned long long user = 0, nice = 0, system = 0, idle = 0, iowait = 0, irq = 0, softirq = 0, steal = 0, guest = 0, guest_nice = 0;
-
-            id          = row_key;
-            user        = str2ull(procfile_lineword(ff, l, 1));
-            nice        = str2ull(procfile_lineword(ff, l, 2));
-            system      = str2ull(procfile_lineword(ff, l, 3));
-            idle        = str2ull(procfile_lineword(ff, l, 4));
-            iowait      = str2ull(procfile_lineword(ff, l, 5));
-            irq         = str2ull(procfile_lineword(ff, l, 6));
-            softirq     = str2ull(procfile_lineword(ff, l, 7));
-            steal       = str2ull(procfile_lineword(ff, l, 8));
-
-            guest       = str2ull(procfile_lineword(ff, l, 9));
-            user -= guest;
-
-            guest_nice  = str2ull(procfile_lineword(ff, l, 10));
-            nice -= guest_nice;
-
-            char *title, *type, *context, *family;
-            long priority;
-            int isthistotal;
-
-            if(unlikely(strcmp(id, "cpu")) == 0) {
-                title = "Total CPU utilization";
-                type = "system";
-                context = "system.cpu";
-                family = id;
-                priority = 100;
-                isthistotal = 1;
-            }
-            else {
-                title = "Core utilization";
-                type = "cpu";
-                context = "cpu.cpu";
-                family = "utilization";
-                priority = 1000;
-                isthistotal = 0;
-            }
+            size_t core    = (row_key[3] == '\0') ? 0 : str2ul(&row_key[3]) + 1;
+
+            if(likely((core == 0 && do_cpu) || (core > 0 && do_cpu_cores))) {
+                char *id;
+                unsigned long long user = 0, nice = 0, system = 0, idle = 0, iowait = 0, irq = 0, softirq = 0, steal = 0, guest = 0, guest_nice = 0;
 
-            if(likely((isthistotal && do_cpu) || (!isthistotal && do_cpu_cores))) {
-                st = rrdset_find_bytype_localhost(type, id);
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost(type, id, NULL, family, context, title, "percentage", priority
-                                                 , update_every, RRDSET_TYPE_STACKED);
+                id          = row_key;
+                user        = str2ull(procfile_lineword(ff, l, 1));
+                nice        = str2ull(procfile_lineword(ff, l, 2));
+                system      = str2ull(procfile_lineword(ff, l, 3));
+                idle        = str2ull(procfile_lineword(ff, l, 4));
+                iowait      = str2ull(procfile_lineword(ff, l, 5));
+                irq         = str2ull(procfile_lineword(ff, l, 6));
+                softirq     = str2ull(procfile_lineword(ff, l, 7));
+                steal       = str2ull(procfile_lineword(ff, l, 8));
+
+                guest       = str2ull(procfile_lineword(ff, l, 9));
+                user -= guest;
+
+                guest_nice  = str2ull(procfile_lineword(ff, l, 10));
+                nice -= guest_nice;
+
+                char *title, *type, *context, *family;
+                long priority;
+
+                if(core >= all_cpu_charts_size) {
+                    size_t old_cpu_charts_size = all_cpu_charts_size;
+                    all_cpu_charts_size = core + 1;
+                    all_cpu_charts = reallocz(all_cpu_charts, sizeof(struct cpu_chart) * all_cpu_charts_size);
+                    memset(&all_cpu_charts[old_cpu_charts_size], 0, sizeof(struct cpu_chart) * (all_cpu_charts_size - old_cpu_charts_size));
+                }
+                struct cpu_chart *cpu_chart = &all_cpu_charts[core];
+
+                if(unlikely(!cpu_chart->st)) {
+                    cpu_chart->id = strdupz(id);
+
+                    if(core == 0) {
+                        title = "Total CPU utilization";
+                        type = "system";
+                        context = "system.cpu";
+                        family = id;
+                        priority = 100;
+                    }
+                    else {
+                        title = "Core utilization";
+                        type = "cpu";
+                        context = "cpu.cpu";
+                        family = "utilization";
+                        priority = 1000;
+
+                        // FIXME: check for /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq
+                        // FIXME: check for /sys/devices/system/cpu/cpu*/cpufreq/stats/time_in_state
+
+                        char filename[FILENAME_MAX + 1];
+                        struct stat stbuf;
+
+                        if(do_core_throttle_count != CONFIG_BOOLEAN_NO) {
+                            snprintfz(filename, FILENAME_MAX, core_throttle_count_filename, id);
+                            if (stat(filename, &stbuf) == 0) {
+                                cpu_chart->files[CORE_THROTTLE_COUNT_INDEX].filename = strdupz(filename);
+                                cpu_chart->files[CORE_THROTTLE_COUNT_INDEX].fd = -1;
+                                do_core_throttle_count = CONFIG_BOOLEAN_YES;
+                            }
+                        }
+
+                        if(do_package_throttle_count != CONFIG_BOOLEAN_NO) {
+                            snprintfz(filename, FILENAME_MAX, package_throttle_count_filename, id);
+                            if (stat(filename, &stbuf) == 0) {
+                                cpu_chart->files[PACKAGE_THROTTLE_COUNT_INDEX].filename = strdupz(filename);
+                                cpu_chart->files[PACKAGE_THROTTLE_COUNT_INDEX].fd = -1;
+                                do_package_throttle_count = CONFIG_BOOLEAN_YES;
+                            }
+                        }
+
+                        if(do_scaling_cur_freq != CONFIG_BOOLEAN_NO) {
+                            snprintfz(filename, FILENAME_MAX, scaling_cur_freq_filename, id);
+                            if (stat(filename, &stbuf) == 0) {
+                                cpu_chart->files[SCALING_CUR_FREQ_INDEX].filename = strdupz(filename);
+                                cpu_chart->files[SCALING_CUR_FREQ_INDEX].fd = -1;
+                                do_scaling_cur_freq = CONFIG_BOOLEAN_YES;
+                            }
+                        }
+                    }
+
+                    cpu_chart->st = rrdset_create_localhost(
+                            type
+                            , id
+                            , NULL
+                            , family
+                            , context
+                            , title
+                            , "percentage"
+                            , priority
+                            , update_every
+                            , RRDSET_TYPE_STACKED
+                    );
 
                     long multiplier = 1;
                     long divisor = 1; // sysconf(_SC_CLK_TCK);
 
-                    rrddim_add(st, "guest_nice", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "guest", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "steal", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "softirq", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "irq", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "user", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "system", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "nice", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_add(st, "iowait", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-
-                    rrddim_add(st, "idle", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
-                    rrddim_hide(st, "idle");
+                    cpu_chart->rd_guest_nice = rrddim_add(cpu_chart->st, "guest_nice", NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_guest      = rrddim_add(cpu_chart->st, "guest",      NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_steal      = rrddim_add(cpu_chart->st, "steal",      NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_softirq    = rrddim_add(cpu_chart->st, "softirq",    NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_irq        = rrddim_add(cpu_chart->st, "irq",        NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_user       = rrddim_add(cpu_chart->st, "user",       NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_system     = rrddim_add(cpu_chart->st, "system",     NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_nice       = rrddim_add(cpu_chart->st, "nice",       NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_iowait     = rrddim_add(cpu_chart->st, "iowait",     NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    cpu_chart->rd_idle       = rrddim_add(cpu_chart->st, "idle",       NULL, multiplier, divisor, RRD_ALGORITHM_PCENT_OVER_DIFF_TOTAL);
+                    rrddim_hide(cpu_chart->st, "idle");
                 }
-                else rrdset_next(st);
-
-                rrddim_set(st, "user", user);
-                rrddim_set(st, "nice", nice);
-                rrddim_set(st, "system", system);
-                rrddim_set(st, "idle", idle);
-                rrddim_set(st, "iowait", iowait);
-                rrddim_set(st, "irq", irq);
-                rrddim_set(st, "softirq", softirq);
-                rrddim_set(st, "steal", steal);
-                rrddim_set(st, "guest", guest);
-                rrddim_set(st, "guest_nice", guest_nice);
-                rrdset_done(st);
+                else rrdset_next(cpu_chart->st);
+
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_user, user);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_nice, nice);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_system, system);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_idle, idle);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_iowait, iowait);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_irq, irq);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_softirq, softirq);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_steal, steal);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_guest, guest);
+                rrddim_set_by_pointer(cpu_chart->st, cpu_chart->rd_guest_nice, guest_nice);
+                rrdset_done(cpu_chart->st);
             }
         }
         else if(unlikely(hash == hash_intr && strcmp(row_key, "intr") == 0)) {
-            unsigned long long value = str2ull(procfile_lineword(ff, l, 1));
-
-            // --------------------------------------------------------------------
-
             if(likely(do_interrupts)) {
-                st = rrdset_find_bytype_localhost("system", "intr");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("system", "intr", NULL, "interrupts", NULL, "CPU Interrupts"
-                                                 , "interrupts/s", 900, update_every, RRDSET_TYPE_LINE);
-                    rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-                    rrddim_add(st, "interrupts", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                static RRDSET *st_intr = NULL;
+                static RRDDIM *rd_interrupts = NULL;
+                unsigned long long value = str2ull(procfile_lineword(ff, l, 1));
+
+                if(unlikely(!st_intr)) {
+                    st_intr = rrdset_create_localhost(
+                            "system"
+                            , "intr"
+                            , NULL
+                            , "interrupts"
+                            , NULL
+                            , "CPU Interrupts"
+                            , "interrupts/s"
+                            , 900
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rrdset_flag_set(st_intr, RRDSET_FLAG_DETAIL);
+
+                    rd_interrupts = rrddim_add(st_intr, "interrupts", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else rrdset_next(st_intr);
 
-                rrddim_set(st, "interrupts", value);
-                rrdset_done(st);
+                rrddim_set_by_pointer(st_intr, rd_interrupts, value);
+                rrdset_done(st_intr);
             }
         }
         else if(unlikely(hash == hash_ctxt && strcmp(row_key, "ctxt") == 0)) {
-            unsigned long long value = str2ull(procfile_lineword(ff, l, 1));
-
-            // --------------------------------------------------------------------
-
             if(likely(do_context)) {
-                st = rrdset_find_bytype_localhost("system", "ctxt");
-                if(unlikely(!st)) {
-                    st = rrdset_create_localhost("system", "ctxt", NULL, "processes", NULL, "CPU Context Switches"
-                                                 , "context switches/s", 800, update_every, RRDSET_TYPE_LINE);
-
-                    rrddim_add(st, "switches", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                static RRDSET *st_ctxt = NULL;
+                static RRDDIM *rd_switches = NULL;
+                unsigned long long value = str2ull(procfile_lineword(ff, l, 1));
+
+                if(unlikely(!st_ctxt)) {
+                    st_ctxt = rrdset_create_localhost(
+                            "system"
+                            , "ctxt"
+                            , NULL
+                            , "processes"
+                            , NULL
+                            , "CPU Context Switches"
+                            , "context switches/s"
+                            , 800
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+
+                    rd_switches = rrddim_add(st_ctxt, "switches", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
                 }
-                else rrdset_next(st);
+                else rrdset_next(st_ctxt);
 
-                rrddim_set(st, "switches", value);
-                rrdset_done(st);
+                rrddim_set_by_pointer(st_ctxt, rd_switches, value);
+                rrdset_done(st_ctxt);
             }
         }
         else if(unlikely(hash == hash_processes && !processes && strcmp(row_key, "processes") == 0)) {
@@ -180,36 +394,147 @@ int do_proc_stat(int update_every, usec_t dt) {
     // --------------------------------------------------------------------
 
     if(likely(do_forks)) {
-        st = rrdset_find_bytype_localhost("system", "forks");
-        if(unlikely(!st)) {
-            st = rrdset_create_localhost("system", "forks", NULL, "processes", NULL, "Started Processes", "processes/s"
-                                         , 700, update_every, RRDSET_TYPE_LINE);
-            rrdset_flag_set(st, RRDSET_FLAG_DETAIL);
-
-            rrddim_add(st, "started", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+        static RRDSET *st_forks = NULL;
+        static RRDDIM *rd_started = NULL;
+
+        if(unlikely(!st_forks)) {
+            st_forks = rrdset_create_localhost(
+                    "system"
+                    , "forks"
+                    , NULL
+                    , "processes"
+                    , NULL
+                    , "Started Processes"
+                    , "processes/s"
+                    , 700
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+            rrdset_flag_set(st_forks, RRDSET_FLAG_DETAIL);
+
+            rd_started = rrddim_add(st_forks, "started", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
         }
-        else rrdset_next(st);
+        else rrdset_next(st_forks);
 
-        rrddim_set(st, "started", processes);
-        rrdset_done(st);
+        rrddim_set_by_pointer(st_forks, rd_started, processes);
+        rrdset_done(st_forks);
     }
 
     // --------------------------------------------------------------------
 
     if(likely(do_processes)) {
-        st = rrdset_find_bytype_localhost("system", "processes");
-        if(unlikely(!st)) {
-            st = rrdset_create_localhost("system", "processes", NULL, "processes", NULL, "System Processes", "processes"
-                                         , 600, update_every, RRDSET_TYPE_LINE);
+        static RRDSET *st_processes = NULL;
+        static RRDDIM *rd_running = NULL;
+        static RRDDIM *rd_blocked = NULL;
+
+        if(unlikely(!st_processes)) {
+            st_processes = rrdset_create_localhost(
+                    "system"
+                    , "processes"
+                    , NULL
+                    , "processes"
+                    , NULL
+                    , "System Processes"
+                    , "processes"
+                    , 600
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rd_running = rrddim_add(st_processes, "running", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+            rd_blocked = rrddim_add(st_processes, "blocked", NULL, -1, 1, RRD_ALGORITHM_ABSOLUTE);
+        }
+        else rrdset_next(st_processes);
+
+        rrddim_set_by_pointer(st_processes, rd_running, running);
+        rrddim_set_by_pointer(st_processes, rd_blocked, blocked);
+        rrdset_done(st_processes);
+    }
 
-            rrddim_add(st, "running", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
-            rrddim_add(st, "blocked", NULL, -1, 1, RRD_ALGORITHM_ABSOLUTE);
+    if(likely(all_cpu_charts_size > 1)) {
+        if(likely(do_core_throttle_count != CONFIG_BOOLEAN_NO)) {
+            int r = read_per_core_files(&all_cpu_charts[1], all_cpu_charts_size - 1, CORE_THROTTLE_COUNT_INDEX);
+            if(likely(r != -1 && (do_core_throttle_count == CONFIG_BOOLEAN_YES || r > 0))) {
+                do_core_throttle_count = CONFIG_BOOLEAN_YES;
+
+                static RRDSET *st_core_throttle_count = NULL;
+
+                if (unlikely(!st_core_throttle_count))
+                    st_core_throttle_count = rrdset_create_localhost(
+                            "cpu"
+                            , "core_throttling"
+                            , NULL
+                            , "throttling"
+                            , "cpu.core_throttling"
+                            , "Core Thermal Throttling Events"
+                            , "events/s"
+                            , 5001
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+                else
+                    rrdset_next(st_core_throttle_count);
+
+                chart_per_core_files(&all_cpu_charts[1], all_cpu_charts_size - 1, CORE_THROTTLE_COUNT_INDEX, st_core_throttle_count, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                rrdset_done(st_core_throttle_count);
+            }
         }
-        else rrdset_next(st);
 
-        rrddim_set(st, "running", running);
-        rrddim_set(st, "blocked", blocked);
-        rrdset_done(st);
+        if(likely(do_package_throttle_count != CONFIG_BOOLEAN_NO)) {
+            int r = read_per_core_files(&all_cpu_charts[1], all_cpu_charts_size - 1, PACKAGE_THROTTLE_COUNT_INDEX);
+            if(likely(r != -1 && (do_package_throttle_count == CONFIG_BOOLEAN_YES || r > 0))) {
+                do_package_throttle_count = CONFIG_BOOLEAN_YES;
+
+                static RRDSET *st_package_throttle_count = NULL;
+
+                if(unlikely(!st_package_throttle_count))
+                    st_package_throttle_count = rrdset_create_localhost(
+                            "cpu"
+                            , "package_throttling"
+                            , NULL
+                            , "throttling"
+                            , "cpu.package_throttling"
+                            , "Package Thermal Throttling Events"
+                            , "events/s"
+                            , 5002
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+                else
+                    rrdset_next(st_package_throttle_count);
+
+                chart_per_core_files(&all_cpu_charts[1], all_cpu_charts_size - 1, PACKAGE_THROTTLE_COUNT_INDEX, st_package_throttle_count, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+                rrdset_done(st_package_throttle_count);
+            }
+        }
+
+        if(likely(do_scaling_cur_freq != CONFIG_BOOLEAN_NO)) {
+            int r = read_per_core_files(&all_cpu_charts[1], all_cpu_charts_size - 1, SCALING_CUR_FREQ_INDEX);
+            if(likely(r != -1 && (do_scaling_cur_freq == CONFIG_BOOLEAN_YES || r > 0))) {
+                do_scaling_cur_freq = CONFIG_BOOLEAN_YES;
+
+                static RRDSET *st_scaling_cur_freq = NULL;
+
+                if(unlikely(!st_scaling_cur_freq))
+                    st_scaling_cur_freq = rrdset_create_localhost(
+                            "cpu"
+                            , "scaling_cur_freq"
+                            , NULL
+                            , "cpufreq"
+                            , "cpu.scaling_cur_freq"
+                            , "Per CPU Core, Current CPU Scaling Frequency"
+                            , "MHz"
+                            , 5003
+                            , update_every
+                            , RRDSET_TYPE_LINE
+                    );
+                else
+                    rrdset_next(st_scaling_cur_freq);
+
+                chart_per_core_files(&all_cpu_charts[1], all_cpu_charts_size - 1, SCALING_CUR_FREQ_INDEX, st_scaling_cur_freq, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
+                rrdset_done(st_scaling_cur_freq);
+            }
+        }
     }
 
     return 0;
diff --git a/src/proc_sys_kernel_random_entropy_avail.c b/src/proc_sys_kernel_random_entropy_avail.c
index fea8900d..267ea271 100644
--- a/src/proc_sys_kernel_random_entropy_avail.c
+++ b/src/proc_sys_kernel_random_entropy_avail.c
@@ -17,15 +17,28 @@ int do_proc_sys_kernel_random_entropy_avail(int update_every, usec_t dt) {
 
     unsigned long long entropy = str2ull(procfile_lineword(ff, 0, 0));
 
-    RRDSET *st = rrdset_find_bytype_localhost("system", "entropy");
+    static RRDSET *st = NULL;
+    static RRDDIM *rd = NULL;
+
     if(unlikely(!st)) {
-        st = rrdset_create_localhost("system", "entropy", NULL, "entropy", NULL, "Available Entropy", "entropy", 1000
-                                     , update_every, RRDSET_TYPE_LINE);
-        rrddim_add(st, "entropy", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
+        st = rrdset_create_localhost(
+                "system"
+                , "entropy"
+                , NULL
+                , "entropy"
+                , NULL
+                , "Available Entropy"
+                , "entropy"
+                , 1000
+                , update_every
+                , RRDSET_TYPE_LINE
+        );
+
+        rd = rrddim_add(st, "entropy", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
     }
     else rrdset_next(st);
 
-    rrddim_set(st, "entropy", entropy);
+    rrddim_set_by_pointer(st, rd, entropy);
     rrdset_done(st);
 
     return 0;
diff --git a/src/proc_uptime.c b/src/proc_uptime.c
index f74cccb9..fb05b5cb 100644
--- a/src/proc_uptime.c
+++ b/src/proc_uptime.c
@@ -3,7 +3,6 @@
 int do_proc_uptime(int update_every, usec_t dt) {
     (void)dt;
 
-    static RRDSET *st = NULL;
     collected_number uptime = 0;
 
 #ifdef CLOCK_BOOTTIME_IS_AVAILABLE
@@ -38,17 +37,31 @@ int do_proc_uptime(int update_every, usec_t dt) {
 
     // --------------------------------------------------------------------
 
-    if(unlikely(!st))
-        st = rrdset_find_localhost("system.uptime");
+    static RRDSET *st = NULL;
+    static RRDDIM *rd = NULL;
 
     if(unlikely(!st)) {
-        st = rrdset_create_localhost("system", "uptime", NULL, "uptime", NULL, "System Uptime", "seconds", 1000
-                                     , update_every, RRDSET_TYPE_LINE);
-        rrddim_add(st, "uptime", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
+
+        st = rrdset_create_localhost(
+                "system"
+                , "uptime"
+                , NULL
+                , "uptime"
+                , NULL
+                , "System Uptime"
+                , "seconds"
+                , 1000
+                , update_every
+                , RRDSET_TYPE_LINE
+        );
+
+        rd = rrddim_add(st, "uptime", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
     }
-    else rrdset_next(st);
+    else
+        rrdset_next(st);
+
+    rrddim_set_by_pointer(st, rd, uptime);
 
-    rrddim_set(st, "uptime", uptime);
     rrdset_done(st);
 
     return 0;
diff --git a/src/proc_vmstat.c b/src/proc_vmstat.c
index a2416313..2382116f 100644
--- a/src/proc_vmstat.c
+++ b/src/proc_vmstat.c
@@ -91,17 +91,29 @@ int do_proc_vmstat(int update_every, usec_t dt) {
         do_swapio = CONFIG_BOOLEAN_YES;
 
         static RRDSET *st_swapio = NULL;
-        if(unlikely(!st_swapio)) {
-            st_swapio = rrdset_create_localhost("system", "swapio", NULL, "swap", NULL, "Swap I/O", "kilobytes/s", 250
-                                                , update_every, RRDSET_TYPE_AREA);
+        static RRDDIM *rd_in = NULL, *rd_out = NULL;
 
-            rrddim_add(st_swapio, "in",  NULL, sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_swapio, "out", NULL, -sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_INCREMENTAL);
+        if(unlikely(!st_swapio)) {
+            st_swapio = rrdset_create_localhost(
+                    "system"
+                    , "swapio"
+                    , NULL
+                    , "swap"
+                    , NULL
+                    , "Swap I/O"
+                    , "kilobytes/s"
+                    , 250
+                    , update_every
+                    , RRDSET_TYPE_AREA
+            );
+
+            rd_in  = rrddim_add(st_swapio, "in",  NULL,  sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_INCREMENTAL);
+            rd_out = rrddim_add(st_swapio, "out", NULL, -sysconf(_SC_PAGESIZE), 1024, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st_swapio);
 
-        rrddim_set(st_swapio, "in", pswpin);
-        rrddim_set(st_swapio, "out", pswpout);
+        rrddim_set_by_pointer(st_swapio, rd_in, pswpin);
+        rrddim_set_by_pointer(st_swapio, rd_out, pswpout);
         rrdset_done(st_swapio);
     }
 
@@ -109,17 +121,29 @@ int do_proc_vmstat(int update_every, usec_t dt) {
 
     if(do_io) {
         static RRDSET *st_io = NULL;
-        if(unlikely(!st_io)) {
-            st_io = rrdset_create_localhost("system", "io", NULL, "disk", NULL, "Disk I/O", "kilobytes/s", 150
-                                            , update_every, RRDSET_TYPE_AREA);
+        static RRDDIM *rd_in = NULL, *rd_out = NULL;
 
-            rrddim_add(st_io, "in",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_io, "out", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+        if(unlikely(!st_io)) {
+            st_io = rrdset_create_localhost(
+                    "system"
+                    , "io"
+                    , NULL
+                    , "disk"
+                    , NULL
+                    , "Disk I/O"
+                    , "kilobytes/s"
+                    , 150
+                    , update_every
+                    , RRDSET_TYPE_AREA
+            );
+
+            rd_in  = rrddim_add(st_io, "in",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_out = rrddim_add(st_io, "out", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st_io);
 
-        rrddim_set(st_io, "in", pgpgin);
-        rrddim_set(st_io, "out", pgpgout);
+        rrddim_set_by_pointer(st_io, rd_in, pgpgin);
+        rrddim_set_by_pointer(st_io, rd_out, pgpgout);
         rrdset_done(st_io);
     }
 
@@ -127,18 +151,31 @@ int do_proc_vmstat(int update_every, usec_t dt) {
 
     if(do_pgfaults) {
         static RRDSET *st_pgfaults = NULL;
+        static RRDDIM *rd_minor = NULL, *rd_major = NULL;
+
         if(unlikely(!st_pgfaults)) {
-            st_pgfaults = rrdset_create_localhost("mem", "pgfaults", NULL, "system", NULL, "Memory Page Faults"
-                                                  , "page faults/s", 500, update_every, RRDSET_TYPE_LINE);
+            st_pgfaults = rrdset_create_localhost(
+                    "mem"
+                    , "pgfaults"
+                    , NULL
+                    , "system"
+                    , NULL
+                    , "Memory Page Faults"
+                    , "page faults/s"
+                    , 500
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
             rrdset_flag_set(st_pgfaults, RRDSET_FLAG_DETAIL);
 
-            rrddim_add(st_pgfaults, "minor",  NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_pgfaults, "major", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_minor = rrddim_add(st_pgfaults, "minor", NULL,  1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_major = rrddim_add(st_pgfaults, "major", NULL, -1, 1, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st_pgfaults);
 
-        rrddim_set(st_pgfaults, "minor", pgfault);
-        rrddim_set(st_pgfaults, "major", pgmajfault);
+        rrddim_set_by_pointer(st_pgfaults, rd_minor, pgfault);
+        rrddim_set_by_pointer(st_pgfaults, rd_major, pgmajfault);
         rrdset_done(st_pgfaults);
     }
 
@@ -149,6 +186,7 @@ int do_proc_vmstat(int update_every, usec_t dt) {
     // single-node systems have uninteresting statistics (since all accesses
     // are local).
     if(unlikely(has_numa == -1))
+
         has_numa = (numa_local || numa_foreign || numa_interleave || numa_other || numa_pte_updates ||
                      numa_huge_pte_updates || numa_hint_faults || numa_hint_faults_local || numa_pages_migrated) ? 1 : 0;
 
@@ -156,37 +194,50 @@ int do_proc_vmstat(int update_every, usec_t dt) {
         do_numa = CONFIG_BOOLEAN_YES;
 
         static RRDSET *st_numa = NULL;
+        static RRDDIM *rd_local = NULL, *rd_foreign = NULL, *rd_interleave = NULL, *rd_other = NULL, *rd_pte_updates = NULL, *rd_huge_pte_updates = NULL, *rd_hint_faults = NULL, *rd_hint_faults_local = NULL, *rd_pages_migrated = NULL;
+
         if(unlikely(!st_numa)) {
-            st_numa = rrdset_create_localhost("mem", "numa", NULL, "numa", NULL, "NUMA events", "events/s", 800
-                                              , update_every, RRDSET_TYPE_LINE);
+            st_numa = rrdset_create_localhost(
+                    "mem"
+                    , "numa"
+                    , NULL
+                    , "numa"
+                    , NULL
+                    , "NUMA events"
+                    , "events/s"
+                    , 800
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
             rrdset_flag_set(st_numa, RRDSET_FLAG_DETAIL);
 
             // These depend on CONFIG_NUMA in the kernel.
-            rrddim_add(st_numa, "local", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_numa, "foreign", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_numa, "interleave", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_numa, "other", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_local             = rrddim_add(st_numa, "local",             NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_foreign           = rrddim_add(st_numa, "foreign",           NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_interleave        = rrddim_add(st_numa, "interleave",        NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_other             = rrddim_add(st_numa, "other",             NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
 
             // The following stats depend on CONFIG_NUMA_BALANCING in the
             // kernel.
-            rrddim_add(st_numa, "pte_updates", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_numa, "huge_pte_updates", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_numa, "hint_faults", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_numa, "hint_faults_local", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
-            rrddim_add(st_numa, "pages_migrated", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_pte_updates       = rrddim_add(st_numa, "pte_updates",       NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_huge_pte_updates  = rrddim_add(st_numa, "huge_pte_updates",  NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_hint_faults       = rrddim_add(st_numa, "hint_faults",       NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_hint_faults_local = rrddim_add(st_numa, "hint_faults_local", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            rd_pages_migrated    = rrddim_add(st_numa, "pages_migrated",    NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
         }
         else rrdset_next(st_numa);
 
-        rrddim_set(st_numa, "local", numa_local);
-        rrddim_set(st_numa, "foreign", numa_foreign);
-        rrddim_set(st_numa, "interleave", numa_interleave);
-        rrddim_set(st_numa, "other", numa_other);
+        rrddim_set_by_pointer(st_numa, rd_local,             numa_local);
+        rrddim_set_by_pointer(st_numa, rd_foreign,           numa_foreign);
+        rrddim_set_by_pointer(st_numa, rd_interleave,        numa_interleave);
+        rrddim_set_by_pointer(st_numa, rd_other,             numa_other);
 
-        rrddim_set(st_numa, "pte_updates", numa_pte_updates);
-        rrddim_set(st_numa, "huge_pte_updates", numa_huge_pte_updates);
-        rrddim_set(st_numa, "hint_faults", numa_hint_faults);
-        rrddim_set(st_numa, "hint_faults_local", numa_hint_faults_local);
-        rrddim_set(st_numa, "pages_migrated", numa_pages_migrated);
+        rrddim_set_by_pointer(st_numa, rd_pte_updates,       numa_pte_updates);
+        rrddim_set_by_pointer(st_numa, rd_huge_pte_updates,  numa_huge_pte_updates);
+        rrddim_set_by_pointer(st_numa, rd_hint_faults,       numa_hint_faults);
+        rrddim_set_by_pointer(st_numa, rd_hint_faults_local, numa_hint_faults_local);
+        rrddim_set_by_pointer(st_numa, rd_pages_migrated,    numa_pages_migrated);
 
         rrdset_done(st_numa);
     }
diff --git a/src/rrd.h b/src/rrd.h
index 5bc61dcb..1ebb89e5 100644
--- a/src/rrd.h
+++ b/src/rrd.h
@@ -462,6 +462,9 @@ struct rrdhost {
     RRDCALC *alarms;
 
     ALARM_LOG health_log;                           // alarms historical events (event log)
+    uint32_t health_last_processed_id;              // the last processed health id from the log
+    uint32_t health_max_unique_id;                  // the max alarm log unique id given for the host
+    uint32_t health_max_alarm_id;                   // the max alarm id given for the host
 
     // templates of alarms
     // these are used to create alarms when charts
diff --git a/src/rrd2json.c b/src/rrd2json.c
index 98080139..84d90448 100644
--- a/src/rrd2json.c
+++ b/src/rrd2json.c
@@ -213,14 +213,14 @@ void rrd_stats_api_v1_charts_allmetrics_shell(RRDHOST *host, BUFFER *wb) {
                         buffer_sprintf(wb, "NETDATA_%s_%s=\"\"      # %s\n", chart, dimension, st->units);
                     else {
                         if(rd->multiplier < 0 || rd->divisor < 0) n = -n;
-                        n = roundl(n);
+                        n = calculated_number_round(n);
                         if(!rrddim_flag_check(rd, RRDDIM_FLAG_HIDDEN)) total += n;
                         buffer_sprintf(wb, "NETDATA_%s_%s=\"%0.0Lf\"      # %s\n", chart, dimension, n, st->units);
                     }
                 }
             }
 
-            total = roundl(total);
+            total = calculated_number_round(total);
             buffer_sprintf(wb, "NETDATA_%s_VISIBLETOTAL=\"%0.0Lf\"      # %s\n", chart, total, st->units);
             rrdset_unlock(st);
         }
@@ -243,7 +243,7 @@ void rrd_stats_api_v1_charts_allmetrics_shell(RRDHOST *host, BUFFER *wb) {
         if(isnan(n) || isinf(n))
             buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_VALUE=\"\"      # %s\n", chart, alarm, rc->units);
         else {
-            n = roundl(n);
+            n = calculated_number_round(n);
             buffer_sprintf(wb, "NETDATA_ALARM_%s_%s_VALUE=\"%0.0Lf\"      # %s\n", chart, alarm, n, rc->units);
         }
 
@@ -1573,13 +1573,13 @@ RRDR *rrd2rrdr(RRDSET *st, long points, long long after, long long before, int g
             switch(group_method) {
                 case GROUP_MIN:
                     if(unlikely(isnan(group_values[c])) ||
-                            fabsl(value) < fabsl(group_values[c]))
+                            calculated_number_fabs(value) < calculated_number_fabs(group_values[c]))
                         group_values[c] = value;
                     break;
 
                 case GROUP_MAX:
                     if(unlikely(isnan(group_values[c])) ||
-                            fabsl(value) > fabsl(group_values[c]))
+                            calculated_number_fabs(value) > calculated_number_fabs(group_values[c]))
                         group_values[c] = value;
                     break;
 
diff --git a/src/rrddim.c b/src/rrddim.c
index e75aa3fd..8df54839 100644
--- a/src/rrddim.c
+++ b/src/rrddim.c
@@ -167,11 +167,11 @@ RRDDIM *rrddim_add_custom(RRDSET *st, const char *id, const char *name, collecte
                     }
 
                     if(rd->multiplier != multiplier) {
-                        info("File %s does not have the expected multiplier (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT ". Previous values may be wrong.", fullfilename, multiplier, rd->multiplier);
+                        info("File %s does not have the expected multiplier (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT "). Previous values may be wrong.", fullfilename, multiplier, rd->multiplier);
                     }
 
                     if(rd->divisor != divisor) {
-                        info("File %s does not have the expected divisor (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT ". Previous values may be wrong.", fullfilename, divisor, rd->divisor);
+                        info("File %s does not have the expected divisor (expected " COLLECTED_NUMBER_FORMAT ", found " COLLECTED_NUMBER_FORMAT "). Previous values may be wrong.", fullfilename, divisor, rd->divisor);
                     }
                 }
             }
diff --git a/src/rrdpush.c b/src/rrdpush.c
index 6def90fe..c1d052fd 100644
--- a/src/rrdpush.c
+++ b/src/rrdpush.c
@@ -113,12 +113,12 @@ static inline void send_chart_definition(RRDSET *st) {
 
 // sends the current chart dimensions
 static inline void send_chart_metrics(RRDSET *st) {
-    buffer_sprintf(st->rrdhost->rrdpush_buffer, "BEGIN %s %llu\n", st->id, (st->upstream_resync_time > st->last_collected_time.tv_sec)?st->usec_since_last_update:0);
+    buffer_sprintf(st->rrdhost->rrdpush_buffer, "BEGIN \"%s\" %llu\n", st->id, (st->upstream_resync_time > st->last_collected_time.tv_sec)?st->usec_since_last_update:0);
 
     RRDDIM *rd;
     rrddim_foreach_read(rd, st) {
         if(rd->updated && rd->exposed)
-            buffer_sprintf(st->rrdhost->rrdpush_buffer, "SET %s = " COLLECTED_NUMBER_FORMAT "\n"
+            buffer_sprintf(st->rrdhost->rrdpush_buffer, "SET \"%s\" = " COLLECTED_NUMBER_FORMAT "\n"
                        , rd->id
                        , rd->collected_value
         );
@@ -380,7 +380,7 @@ void *rrdpush_sender_thread(void *ptr) {
             // allow appending data into rrdpush_buffer
             host->rrdpush_connected = 1;
 
-            debug(D_STREAM, "Connected...");
+            debug(D_STREAM, "STREAM: Connected on fd %d...", host->rrdpush_socket);
         }
 
         ifd->fd = host->rrdpush_pipe[PIPE_READ];
@@ -389,13 +389,13 @@ void *rrdpush_sender_thread(void *ptr) {
 
         ofd->fd = host->rrdpush_socket;
         ofd->revents = 0;
-        if(begin < buffer_strlen(host->rrdpush_buffer)) {
-            debug(D_STREAM, "STREAM: Requesting data output on streaming socket...");
+        if(ofd->fd != -1 && begin < buffer_strlen(host->rrdpush_buffer)) {
+            debug(D_STREAM, "STREAM: Requesting data output on streaming socket %d...", ofd->fd);
             ofd->events = POLLOUT;
             fdmax = 2;
         }
         else {
-            debug(D_STREAM, "STREAM: Not requesting data output on streaming socket (nothing to send now)...");
+            debug(D_STREAM, "STREAM: Not requesting data output on streaming socket %d (nothing to send now)...", ofd->fd);
             ofd->events = 0;
             fdmax = 1;
         }
@@ -419,7 +419,7 @@ void *rrdpush_sender_thread(void *ptr) {
             break;
         }
         else if(likely(retval)) {
-            if (ifd->revents & POLLIN) {
+            if (ifd->revents & POLLIN || ifd->revents & POLLPRI) {
                 debug(D_STREAM, "STREAM: Data added to send buffer (current buffer length %zu bytes)...", buffer_strlen(host->rrdpush_buffer));
 
                 char buffer[1000 + 1];
@@ -427,67 +427,98 @@ void *rrdpush_sender_thread(void *ptr) {
                     error("STREAM %s [send to %s]: cannot read from internal pipe.", host->hostname, connected_to);
             }
 
-            if (ofd->revents & POLLOUT && begin < buffer_strlen(host->rrdpush_buffer)) {
-                debug(D_STREAM, "STREAM: Sending data (current buffer length %zu bytes)...", buffer_strlen(host->rrdpush_buffer));
-
-                // BEGIN RRDPUSH LOCKED SESSION
-
-                // during this session, data collectors
-                // will not be able to append data to our buffer
-                // but the socket is in non-blocking mode
-                // so, we will not block at send()
-
-                if (pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
-                    error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname);
-
-                debug(D_STREAM, "STREAM: Getting exclusive lock on host...");
-                rrdpush_lock(host);
-
-                debug(D_STREAM, "STREAM: Sending data, starting from %zu, size %zu...", begin, buffer_strlen(host->rrdpush_buffer));
-                ssize_t ret = send(host->rrdpush_socket, &host->rrdpush_buffer->buffer[begin], buffer_strlen(host->rrdpush_buffer) - begin, MSG_DONTWAIT);
-                if (unlikely(ret == -1)) {
-                    if (errno != EAGAIN && errno != EINTR && errno != EWOULDBLOCK) {
-                        debug(D_STREAM, "STREAM: Send failed - closing socket...");
-                        error("STREAM %s [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection);
-                        close(host->rrdpush_socket);
-                        host->rrdpush_socket = -1;
+            if (ofd->revents & POLLOUT) {
+                if (begin < buffer_strlen(host->rrdpush_buffer)) {
+                    debug(D_STREAM, "STREAM: Sending data (current buffer length %zu bytes, begin = %zu)...", buffer_strlen(host->rrdpush_buffer), begin);
+
+                    // BEGIN RRDPUSH LOCKED SESSION
+
+                    // during this session, data collectors
+                    // will not be able to append data to our buffer
+                    // but the socket is in non-blocking mode
+                    // so, we will not block at send()
+
+                    if (pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL) != 0)
+                        error("STREAM %s [send]: cannot set pthread cancel state to DISABLE.", host->hostname);
+
+                    debug(D_STREAM, "STREAM: Getting exclusive lock on host...");
+                    rrdpush_lock(host);
+
+                    debug(D_STREAM, "STREAM: Sending data, starting from %zu, size %zu...", begin, buffer_strlen(host->rrdpush_buffer));
+                    ssize_t ret = send(host->rrdpush_socket, &host->rrdpush_buffer->buffer[begin], buffer_strlen(host->rrdpush_buffer) - begin, MSG_DONTWAIT);
+                    if (unlikely(ret == -1)) {
+                        if (errno != EAGAIN && errno != EINTR && errno != EWOULDBLOCK) {
+                            debug(D_STREAM, "STREAM: Send failed - closing socket...");
+                            error("STREAM %s [send to %s]: failed to send metrics - closing connection - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection);
+                            close(host->rrdpush_socket);
+                            host->rrdpush_socket = -1;
+                        }
+                        else {
+                            debug(D_STREAM, "STREAM: Send failed - will retry...");
+                        }
+                    }
+                    else if (likely(ret > 0)) {
+                        // DEBUG - dump the scring to see it
+                        //char c = host->rrdpush_buffer->buffer[begin + ret];
+                        //host->rrdpush_buffer->buffer[begin + ret] = '\0';
+                        //debug(D_STREAM, "STREAM: sent from %zu to %zd:\n%s\n", begin, ret, &host->rrdpush_buffer->buffer[begin]);
+                        //host->rrdpush_buffer->buffer[begin + ret] = c;
+
+                        sent_connection += ret;
+                        sent_bytes += ret;
+                        begin += ret;
+
+                        if (begin == buffer_strlen(host->rrdpush_buffer)) {
+                            // we send it all
+
+                            debug(D_STREAM, "STREAM: Sent %zd bytes (the whole buffer)...", ret);
+                            buffer_flush(host->rrdpush_buffer);
+                            begin = 0;
+                        }
+                        else {
+                            debug(D_STREAM, "STREAM: Sent %zd bytes (part of the data buffer)...", ret);
+                        }
+
+                        last_sent_t = now_monotonic_sec();
                     }
                     else {
-                        debug(D_STREAM, "STREAM: Send failed - will retry...");
+                        debug(D_STREAM, "STREAM: send() returned %zd - closing the socket...", ret);
+                        error("STREAM %s [send to %s]: failed to send metrics (send() returned %zd) - closing connection - we have sent %zu bytes on this connection.",
+                              host->hostname, connected_to, ret, sent_connection);
+                        close(host->rrdpush_socket);
+                        host->rrdpush_socket = -1;
                     }
-                }
-                else if(likely(ret > 0)) {
-                    sent_connection += ret;
-                    sent_bytes += ret;
-                    begin += ret;
 
-                    if (begin == buffer_strlen(host->rrdpush_buffer)) {
-                        // we send it all
+                    debug(D_STREAM, "STREAM: Releasing exclusive lock on host...");
+                    rrdpush_unlock(host);
 
-                        debug(D_STREAM, "STREAM: Sent %zd bytes (the whole buffer)...", ret);
-                        buffer_flush(host->rrdpush_buffer);
-                        begin = 0;
-                    }
-                    else {
-                        debug(D_STREAM, "STREAM: Sent %zd bytes (part of the data buffer)...", ret);
-                    }
+                    if (pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
+                        error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname);
 
-                    last_sent_t = now_monotonic_sec();
+                    // END RRDPUSH LOCKED SESSION
                 }
                 else {
-                    debug(D_STREAM, "STREAM: send() returned %zd - closing the socket...", ret);
-                    error("STREAM %s [send to %s]: failed to send metrics (send() returned %zd) - closing connection - we have sent %zu bytes on this connection.", host->hostname, connected_to, ret, sent_connection);
-                    close(host->rrdpush_socket);
-                    host->rrdpush_socket = -1;
+                    debug(D_STREAM, "STREAM: we have sent the entire buffer, but we received POLLOUT...");
                 }
+            }
 
-                debug(D_STREAM, "STREAM: Releasing exclusive lock on host...");
-                rrdpush_unlock(host);
-
-                if (pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
-                    error("STREAM %s [send]: cannot set pthread cancel state to ENABLE.", host->hostname);
-
-                // END RRDPUSH LOCKED SESSION
+            if(unlikely(ofd->revents & POLLERR)) {
+                debug(D_STREAM, "STREAM: Send failed (POLLERR) - closing socket...");
+                error("STREAM %s [send to %s]: connection reports errors (POLLERR), closing it - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection);
+                close(host->rrdpush_socket);
+                host->rrdpush_socket = -1;
+            }
+            else if(unlikely(ofd->revents & POLLHUP)) {
+                debug(D_STREAM, "STREAM: Send failed (POLLHUP) - closing socket...");
+                error("STREAM %s [send to %s]: connection closed by remote end (POLLHUP) - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection);
+                close(host->rrdpush_socket);
+                host->rrdpush_socket = -1;
+            }
+            else if(unlikely(ofd->revents & POLLNVAL)) {
+                debug(D_STREAM, "STREAM: Send failed (POLLNVAL) - closing socket...");
+                error("STREAM %s [send to %s]: connection is invalid (POLLNVAL), closing it - we have sent %zu bytes on this connection.", host->hostname, connected_to, sent_connection);
+                close(host->rrdpush_socket);
+                host->rrdpush_socket = -1;
             }
         }
         else {
@@ -602,7 +633,7 @@ static int rrdpush_receive(int fd, const char *key, const char *hostname, const
          , host->rrd_history_entries
          , rrd_memory_mode_name(host->rrd_memory_mode)
          , (health_enabled == CONFIG_BOOLEAN_NO)?"disabled":((health_enabled == CONFIG_BOOLEAN_YES)?"enabled":"auto")
-         , host->tags
+         , host->tags?host->tags:""
     );
 #endif // NETDATA_INTERNAL_CHECKS
 
@@ -648,8 +679,15 @@ static int rrdpush_receive(int fd, const char *key, const char *hostname, const
 
     host->connected_senders++;
     rrdhost_flag_clear(host, RRDHOST_ORPHAN);
-    if(health_enabled != CONFIG_BOOLEAN_NO)
-        host->health_delay_up_to = now_realtime_sec() + alarms_delay;
+    if(health_enabled != CONFIG_BOOLEAN_NO) {
+        if(alarms_delay > 0) {
+            host->health_delay_up_to = now_realtime_sec() + alarms_delay;
+            info("Postponing health checks for %ld seconds, on host '%s', because it was just connected."
+            , alarms_delay
+            , host->hostname
+            );
+        }
+    }
     rrdhost_unlock(host);
 
     // call the plugins.d processor to receive the metrics
diff --git a/src/rrdset.c b/src/rrdset.c
index caa427ff..c5168f02 100644
--- a/src/rrdset.c
+++ b/src/rrdset.c
@@ -582,10 +582,15 @@ RRDSET *rrdset_create_custom(
 
     st->chart_type = rrdset_type_id(config_get(st->config_section, "chart type", rrdset_type_name(chart_type)));
     st->type       = config_get(st->config_section, "type", type);
+
     st->family     = config_get(st->config_section, "family", family?family:st->type);
+    json_fix_string(st->family);
+
     st->units      = config_get(st->config_section, "units", units?units:"");
+    json_fix_string(st->units);
 
     st->context    = config_get(st->config_section, "context", context?context:st->id);
+    json_fix_string(st->context);
     st->hash_context = simple_hash(st->context);
 
     st->priority = config_get_number(st->config_section, "priority", priority);
diff --git a/src/signals.c b/src/signals.c
new file mode 100644
index 00000000..331e8035
--- /dev/null
+++ b/src/signals.c
@@ -0,0 +1,168 @@
+#include "common.h"
+
+typedef enum signal_action {
+    NETDATA_SIGNAL_END_OF_LIST,
+    NETDATA_SIGNAL_IGNORE,
+    NETDATA_SIGNAL_EXIT_CLEANLY,
+    NETDATA_SIGNAL_SAVE_DATABASE,
+    NETDATA_SIGNAL_LOG_ROTATE,
+    NETDATA_SIGNAL_RELOAD_HEALTH,
+    NETDATA_SIGNAL_FATAL,
+} SIGNAL_ACTION;
+
+static struct {
+    int signo;              // the signal
+    const char *name;       // the name of the signal
+    size_t count;           // the number of signals received
+    SIGNAL_ACTION action;   // the action to take
+} signals_waiting[] = {
+        { SIGPIPE, "SIGPIPE", 0, NETDATA_SIGNAL_IGNORE        },
+        { SIGINT , "SIGINT",  0, NETDATA_SIGNAL_EXIT_CLEANLY  },
+        { SIGQUIT, "SIGQUIT", 0, NETDATA_SIGNAL_EXIT_CLEANLY  },
+        { SIGTERM, "SIGTERM", 0, NETDATA_SIGNAL_EXIT_CLEANLY  },
+        { SIGHUP,  "SIGHUP",  0, NETDATA_SIGNAL_LOG_ROTATE    },
+        { SIGUSR1, "SIGUSR1", 0, NETDATA_SIGNAL_SAVE_DATABASE },
+        { SIGUSR2, "SIGUSR2", 0, NETDATA_SIGNAL_RELOAD_HEALTH },
+        { SIGBUS,  "SIGBUS",  0, NETDATA_SIGNAL_FATAL         },
+
+        // terminator
+        { 0,       "NONE",    0, NETDATA_SIGNAL_END_OF_LIST   }
+};
+
+static void signal_handler(int signo) {
+    // find the entry in the list
+    int i;
+    for(i = 0; signals_waiting[i].action != NETDATA_SIGNAL_END_OF_LIST ; i++) {
+        if(unlikely(signals_waiting[i].signo == signo)) {
+            signals_waiting[i].count++;
+
+            if(signals_waiting[i].action == NETDATA_SIGNAL_FATAL) {
+                char buffer[200 + 1];
+                snprintfz(buffer, 200, "\nSIGNAL HANLDER: received: %s. Oops! This is bad!\n", signals_waiting[i].name);
+                if(write(STDERR_FILENO, buffer, strlen(buffer)) == -1) {
+                    // nothing to do - we cannot write but there is no way to complaint about it
+                    ;
+                }
+            }
+
+            return;
+        }
+    }
+}
+
+void signals_block(void) {
+    sigset_t sigset;
+    sigfillset(&sigset);
+
+    if(pthread_sigmask(SIG_BLOCK, &sigset, NULL) == -1)
+        error("SIGNAL: Could not block signals for threads");
+}
+
+void signals_unblock(void) {
+    sigset_t sigset;
+    sigfillset(&sigset);
+
+    if(pthread_sigmask(SIG_UNBLOCK, &sigset, NULL) == -1) {
+        error("SIGNAL: Could not unblock signals for threads");
+    }
+}
+
+void signals_init(void) {
+    // Catch signals which we want to use
+    struct sigaction sa;
+    sa.sa_flags = 0;
+
+    // ignore all signals while we run in a signal handler
+    sigfillset(&sa.sa_mask);
+
+    int i;
+    for (i = 0; signals_waiting[i].action != NETDATA_SIGNAL_END_OF_LIST; i++) {
+        if(signals_waiting[i].action == NETDATA_SIGNAL_IGNORE)
+            sa.sa_handler = SIG_IGN;
+        else
+            sa.sa_handler = signal_handler;
+
+        if(sigaction(signals_waiting[i].signo, &sa, NULL) == -1)
+            error("SIGNAL: Failed to change signal handler for: %s", signals_waiting[i].name);
+    }
+}
+
+void signals_reset(void) {
+    struct sigaction sa;
+    sigemptyset(&sa.sa_mask);
+    sa.sa_handler = SIG_DFL;
+    sa.sa_flags = 0;
+
+    int i;
+    for (i = 0; signals_waiting[i].action != NETDATA_SIGNAL_END_OF_LIST; i++) {
+        if(sigaction(signals_waiting[i].signo, &sa, NULL) == -1)
+            error("SIGNAL: Failed to reset signal handler for: %s", signals_waiting[i].name);
+    }
+}
+
+void signals_handle(void) {
+    while(1) {
+
+        // pause()  causes  the calling process (or thread) to sleep until a signal
+        // is delivered that either terminates the process or causes the invocation
+        // of a signal-catching function.
+        if(pause() == -1 && errno == EINTR) {
+
+            // loop once, but keep looping while signals are coming in
+            // this is needed because a few operations may take some time
+            // so we need to check for new signals before pausing again
+            int found = 1;
+            while(found) {
+                found = 0;
+
+                // execute the actions of the signals
+                int i;
+                for (i = 0; signals_waiting[i].action != NETDATA_SIGNAL_END_OF_LIST; i++) {
+                    if (signals_waiting[i].count) {
+                        found = 1;
+                        signals_waiting[i].count = 0;
+                        const char *name = signals_waiting[i].name;
+
+                        switch (signals_waiting[i].action) {
+                            case NETDATA_SIGNAL_RELOAD_HEALTH:
+                                error_log_limit_unlimited();
+                                info("SIGNAL: Received %s. Reloading HEALTH configuration...", name);
+                                health_reload();
+                                error_log_limit_reset();
+                                break;
+
+                            case NETDATA_SIGNAL_SAVE_DATABASE:
+                                error_log_limit_unlimited();
+                                info("SIGNAL: Received %s. Saving databases...", name);
+                                rrdhost_save_all();
+                                info("Databases saved.");
+                                error_log_limit_reset();
+                                break;
+
+                            case NETDATA_SIGNAL_LOG_ROTATE:
+                                error_log_limit_unlimited();
+                                info("SIGNAL: Received %s. Reopening all log files...", name);
+                                reopen_all_log_files();
+                                error_log_limit_reset();
+                                break;
+
+                            case NETDATA_SIGNAL_EXIT_CLEANLY:
+                                info("SIGNAL: Received %s. Cleaning up to exit...", name);
+                                netdata_cleanup_and_exit(0);
+                                exit(0);
+
+                            case NETDATA_SIGNAL_FATAL:
+                                fatal("SIGNAL: Received %s. netdata now exits.", name);
+
+                            default:
+                                info("SIGNAL: Received %s. No signal handler configured. Ignoring it.", name);
+                                break;
+                        }
+                    }
+                }
+            }
+        }
+        else
+            error("SIGNAL: pause() returned but it was not interrupted by a signal.");
+    }
+}
diff --git a/src/signals.h b/src/signals.h
new file mode 100644
index 00000000..d8611ede
--- /dev/null
+++ b/src/signals.h
@@ -0,0 +1,10 @@
+#ifndef NETDATA_SIGNALS_H
+#define NETDATA_SIGNALS_H
+
+extern void signals_init(void);
+extern void signals_block(void);
+extern void signals_unblock(void);
+extern void signals_handle(void);
+extern void signals_reset(void);
+
+#endif //NETDATA_SIGNALS_H
diff --git a/src/socket.c b/src/socket.c
index 2b382119..d28df81a 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -46,9 +46,10 @@ int sock_setreuse(int fd, int reuse) {
 
 int sock_setreuse_port(int fd, int reuse) {
     int ret = -1;
+
 #ifdef SO_REUSEPORT
     ret = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &reuse, sizeof(reuse));
-    if(ret == -1)
+    if(ret == -1 && errno != ENOPROTOOPT)
         error("failed to set SO_REUSEPORT on socket %d", fd);
 #endif
 
@@ -80,6 +81,50 @@ int sock_enlarge_out(int fd) {
 // --------------------------------------------------------------------------------------------------------------------
 // listening sockets
 
+int create_listen_socket_unix(const char *path, int listen_backlog) {
+    int sock;
+
+    debug(D_LISTENER, "LISTENER: UNIX creating new listening socket on path '%s'", path);
+
+    sock = socket(AF_UNIX, SOCK_STREAM, 0);
+    if(sock < 0) {
+        error("LISTENER: UNIX socket() on path '%s' failed.", path);
+        return -1;
+    }
+
+    sock_setnonblock(sock);
+    sock_enlarge_in(sock);
+
+    struct sockaddr_un name;
+    memset(&name, 0, sizeof(struct sockaddr_un));
+    name.sun_family = AF_UNIX;
+    strncpy(name.sun_path, path, sizeof(name.sun_path)-1);
+
+    errno = 0;
+    if (unlink(path) == -1 && errno != ENOENT)
+        error("LISTENER: failed to remove existing (probably obsolete or left-over) file on UNIX socket path '%s'.", path);
+
+    if(bind (sock, (struct sockaddr *) &name, sizeof (name)) < 0) {
+        close(sock);
+        error("LISTENER: UNIX bind() on path '%s' failed.", path);
+        return -1;
+    }
+
+    // we have to chmod this to 0777 so that the client will be able
+    // to read from and write to this socket.
+    if(chmod(path, 0777) == -1)
+        error("LISTENER: failed to chmod() socket file '%s'.", path);
+
+    if(listen(sock, listen_backlog) < 0) {
+        close(sock);
+        error("LISTENER: UNIX listen() on path '%s' failed.", path);
+        return -1;
+    }
+
+    debug(D_LISTENER, "LISTENER: Listening on UNIX path '%s'", path);
+    return sock;
+}
+
 int create_listen_socket4(int socktype, const char *ip, int port, int listen_backlog) {
     int sock;
 
@@ -176,7 +221,7 @@ int create_listen_socket6(int socktype, uint32_t scope_id, const char *ip, int p
     return sock;
 }
 
-static inline int listen_sockets_add(LISTEN_SOCKETS *sockets, int fd, int socktype, const char *protocol, const char *ip, int port) {
+static inline int listen_sockets_add(LISTEN_SOCKETS *sockets, int fd, int family, int socktype, const char *protocol, const char *ip, int port) {
     if(sockets->opened >= MAX_LISTEN_FDS) {
         error("LISTENER: Too many listening sockets. Failed to add listening %s socket at ip '%s' port %d, protocol %s, socktype %d", protocol, ip, port, protocol, socktype);
         close(fd);
@@ -184,11 +229,27 @@ static inline int listen_sockets_add(LISTEN_SOCKETS *sockets, int fd, int sockty
     }
 
     sockets->fds[sockets->opened] = fd;
+    sockets->fds_types[sockets->opened] = socktype;
+    sockets->fds_families[sockets->opened] = family;
 
     char buffer[100 + 1];
-    snprintfz(buffer, 100, "%s:[%s]:%d", protocol, ip, port);
+
+    switch(family) {
+        case AF_INET:
+            snprintfz(buffer, 100, "%s:%s:%d", protocol, ip, port);
+            break;
+
+        case AF_INET6:
+        default:
+            snprintfz(buffer, 100, "%s:[%s]:%d", protocol, ip, port);
+            break;
+
+        case AF_UNIX:
+            snprintfz(buffer, 100, "%s:%s", protocol, ip);
+            break;
+    }
+
     sockets->fds_names[sockets->opened] = strdupz(buffer);
-    sockets->fds_types[sockets->opened] = socktype;
 
     sockets->opened++;
     return 0;
@@ -230,7 +291,7 @@ void listen_sockets_close(LISTEN_SOCKETS *sockets) {
     sockets->failed = 0;
 }
 
-static inline int bind_to_one(LISTEN_SOCKETS *sockets, const char *definition, int default_port, int listen_backlog) {
+static inline int bind_to_this(LISTEN_SOCKETS *sockets, const char *definition, int default_port, int listen_backlog) {
     int added = 0;
     struct addrinfo hints;
     struct addrinfo *result = NULL, *rp = NULL;
@@ -258,6 +319,22 @@ static inline int bind_to_one(LISTEN_SOCKETS *sockets, const char *definition, i
         socktype = SOCK_DGRAM;
         protocol_str = "udp";
     }
+    else if(strncmp(ip, "unix:", 5) == 0) {
+        char *path = ip + 5;
+        socktype = SOCK_STREAM;
+        protocol_str = "unix";
+
+        int fd = create_listen_socket_unix(path, listen_backlog);
+        if (fd == -1) {
+            error("LISTENER: Cannot create unix socket '%s'", path);
+            sockets->failed++;
+        }
+        else {
+            listen_sockets_add(sockets, fd, AF_UNIX, socktype, protocol_str, path, 0);
+            added++;
+        }
+        return added;
+    }
 
     char *e = ip;
     if(*e == '[') {
@@ -314,11 +391,13 @@ static inline int bind_to_one(LISTEN_SOCKETS *sockets, const char *definition, i
 
     for (rp = result; rp != NULL; rp = rp->ai_next) {
         int fd = -1;
+        int family = -1;
 
         char rip[INET_ADDRSTRLEN + INET6_ADDRSTRLEN] = "INVALID";
         int rport = default_port;
 
-        switch (rp->ai_addr->sa_family) {
+        family = rp->ai_addr->sa_family;
+        switch (family) {
             case AF_INET: {
                 struct sockaddr_in *sin = (struct sockaddr_in *) rp->ai_addr;
                 inet_ntop(AF_INET, &sin->sin_addr, rip, INET_ADDRSTRLEN);
@@ -338,7 +417,7 @@ static inline int bind_to_one(LISTEN_SOCKETS *sockets, const char *definition, i
             }
 
             default:
-                debug(D_LISTENER, "LISTENER: Unknown socket family %d", rp->ai_addr->sa_family);
+                debug(D_LISTENER, "LISTENER: Unknown socket family %d", family);
                 break;
         }
 
@@ -347,7 +426,7 @@ static inline int bind_to_one(LISTEN_SOCKETS *sockets, const char *definition, i
             sockets->failed++;
         }
         else {
-            listen_sockets_add(sockets, fd, socktype, protocol_str, rip, rport);
+            listen_sockets_add(sockets, fd, family, socktype, protocol_str, rip, rport);
             added++;
         }
     }
@@ -385,7 +464,7 @@ int listen_sockets_setup(LISTEN_SOCKETS *sockets) {
 
         char buf[e - s + 1];
         strncpyz(buf, s, e - s);
-        bind_to_one(sockets, buf, sockets->default_port, sockets->backlog);
+        bind_to_this(sockets, buf, sockets->default_port, sockets->backlog);
 
         s = e;
     }
@@ -403,7 +482,39 @@ int listen_sockets_setup(LISTEN_SOCKETS *sockets) {
 // --------------------------------------------------------------------------------------------------------------------
 // connect to another host/port
 
-// _connect_to()
+// connect_to_this_unix()
+// path        the path of the unix socket
+// timeout     the timeout for establishing a connection
+
+static inline int connect_to_unix(const char *path, struct timeval *timeout) {
+    int fd = socket(AF_UNIX, SOCK_STREAM, 0);
+    if(fd == -1) {
+        error("Failed to create UNIX socket() for '%s'", path);
+        return -1;
+    }
+
+    if(timeout) {
+        if(setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, (char *) timeout, sizeof(struct timeval)) < 0)
+            error("Failed to set timeout on UNIX socket '%s'", path);
+    }
+
+    struct sockaddr_un addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sun_family = AF_UNIX;
+    strncpy(addr.sun_path, path, sizeof(addr.sun_path)-1);
+
+    if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) == -1) {
+        error("Cannot connect to UNIX socket on path '%s'.", path);
+        close(fd);
+        return -1;
+    }
+
+    debug(D_CONNECT_TO, "Connected to UNIX socket on path '%s'.", path);
+
+    return fd;
+}
+
+// connect_to_this_ip46()
 // protocol    IPPROTO_TCP, IPPROTO_UDP
 // socktype    SOCK_STREAM, SOCK_DGRAM
 // host        the destination hostname or IP address (IPv4 or IPv6) to connect to
@@ -413,7 +524,7 @@ int listen_sockets_setup(LISTEN_SOCKETS *sockets) {
 // service     the service name or port to connect to
 // timeout     the timeout for establishing a connection
 
-static inline int _connect_to(int protocol, int socktype, const char *host, uint32_t scope_id, const char *service, struct timeval *timeout) {
+static inline int connect_to_this_ip46(int protocol, int socktype, const char *host, uint32_t scope_id, const char *service, struct timeval *timeout) {
     struct addrinfo hints;
     struct addrinfo *ai_head = NULL, *ai = NULL;
 
@@ -519,7 +630,7 @@ static inline int _connect_to(int protocol, int socktype, const char *host, uint
     return fd;
 }
 
-// connect_to()
+// connect_to_this()
 //
 // definition format:
 //
@@ -530,7 +641,7 @@ static inline int _connect_to(int protocol, int socktype, const char *host, uint
 // INTERFACE = for IPv6 only, the network interface to use
 // PORT      = port number or service name
 
-int connect_to(const char *definition, int default_port, struct timeval *timeout) {
+int connect_to_this(const char *definition, int default_port, struct timeval *timeout) {
     char buffer[strlen(definition) + 1];
     strcpy(buffer, definition);
 
@@ -551,6 +662,10 @@ int connect_to(const char *definition, int default_port, struct timeval *timeout
         protocol = IPPROTO_UDP;
         socktype = SOCK_DGRAM;
     }
+    else if(strncmp(host, "unix:", 5) == 0) {
+        char *path = host + 5;
+        return connect_to_unix(path, timeout);
+    }
 
     char *e = host;
     if(*e == '[') {
@@ -595,7 +710,7 @@ int connect_to(const char *definition, int default_port, struct timeval *timeout
         service = default_service;
 
 
-    return _connect_to(protocol, socktype, host, scope_id, service, timeout);
+    return connect_to_this_ip46(protocol, socktype, host, scope_id, service, timeout);
 }
 
 int connect_to_one_of(const char *destination, int default_port, struct timeval *timeout, size_t *reconnects_counter, char *connected_to, size_t connected_to_size) {
@@ -617,7 +732,7 @@ int connect_to_one_of(const char *destination, int default_port, struct timeval
         char buf[e - s + 1];
         strncpyz(buf, s, e - s);
         if(reconnects_counter) *reconnects_counter += 1;
-        sock = connect_to(buf, default_port, timeout);
+        sock = connect_to_this(buf, default_port, timeout);
         if(sock != -1) {
             if(connected_to && connected_to_size) {
                 strncpy(connected_to, buf, connected_to_size);
@@ -747,7 +862,7 @@ int accept_socket(int fd, int flags, char *client_ip, size_t ipsize, char *clien
     socklen_t addrlen = sizeof(sadr);
 
     int nfd = accept4(fd, (struct sockaddr *)&sadr, &addrlen, flags);
-    if (nfd >= 0) {
+    if (likely(nfd >= 0)) {
         if (getnameinfo((struct sockaddr *)&sadr, addrlen, client_ip, (socklen_t)ipsize, client_port, (socklen_t)portsize, NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
             error("LISTENER: cannot getnameinfo() on received client connection.");
             strncpyz(client_ip, "UNKNOWN", ipsize - 1);
@@ -775,6 +890,10 @@ int accept_socket(int fd, int flags, char *client_ip, size_t ipsize, char *clien
                 break;
         }
     }
+#ifdef HAVE_ACCEPT4
+    else if(errno == ENOSYS)
+        error("netdata has been compiled with the assumption that the system has the accept4() call, but it is not here. Recompile netdata like this: ./configure --disable-accept4 ...");
+#endif
 
     return nfd;
 }
diff --git a/src/socket.h b/src/socket.h
index bb95347a..8ca7288c 100644
--- a/src/socket.h
+++ b/src/socket.h
@@ -15,13 +15,14 @@ typedef struct listen_sockets {
     size_t failed;                      // the number of sockets attempted to open, but failed
     int fds[MAX_LISTEN_FDS];            // the open sockets
     char *fds_names[MAX_LISTEN_FDS];    // descriptions for the open sockets
-    int fds_types[MAX_LISTEN_FDS];      // the socktype for the open sockets
+    int fds_types[MAX_LISTEN_FDS];      // the socktype for the open sockets (SOCK_STREAM, SOCK_DGRAM)
+    int fds_families[MAX_LISTEN_FDS];   // the family of the open sockets (AF_UNIX, AF_INET, AF_INET6)
 } LISTEN_SOCKETS;
 
 extern int listen_sockets_setup(LISTEN_SOCKETS *sockets);
 extern void listen_sockets_close(LISTEN_SOCKETS *sockets);
 
-extern int connect_to(const char *definition, int default_port, struct timeval *timeout);
+extern int connect_to_this(const char *definition, int default_port, struct timeval *timeout);
 extern int connect_to_one_of(const char *destination, int default_port, struct timeval *timeout, size_t *reconnects_counter, char *connected_to, size_t connected_to_size);
 
 extern ssize_t recv_timeout(int sockfd, void *buf, size_t len, int flags, int timeout);
diff --git a/src/statsd.c b/src/statsd.c
index 4dd04757..08ce3e2f 100644
--- a/src/statsd.c
+++ b/src/statsd.c
@@ -232,6 +232,7 @@ static struct statsd {
     int update_every;
     SIMPLE_PATTERN *charts_for;
 
+    size_t decimal_detail;
     size_t private_charts;
     size_t max_private_charts;
     size_t max_private_charts_hard;
@@ -250,6 +251,7 @@ static struct statsd {
         .max_private_charts = 200,
         .max_private_charts_hard = 1000,
         .recvmmsg_size = 10,
+        .decimal_detail = STATSD_DECIMAL_DETAIL,
 
         .gauges     = {
                 .name = "gauge",
@@ -443,7 +445,7 @@ static inline void statsd_process_counter(STATSD_METRIC *m, const char *value, c
 
     if(unlikely(m->reset)) statsd_reset_metric(m);
 
-    m->counter.value += roundl((long double)statsd_parse_int(value, 1) / statsd_parse_float(sampling, 1.0));
+    m->counter.value += llrintl((long double)statsd_parse_int(value, 1) / statsd_parse_float(sampling, 1.0));
 
     m->events++;
     m->count++;
@@ -1286,7 +1288,7 @@ static inline void statsd_private_chart_gauge(STATSD_METRIC *m) {
                 , RRDSET_TYPE_LINE
         );
 
-        m->rd_value = rrddim_add(m->st, "gauge",  NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
+        m->rd_value = rrddim_add(m->st, "gauge",  NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
 
         if(m->options & STATSD_METRIC_OPTION_CHART_DIMENSION_COUNT)
             m->rd_count = rrddim_add(m->st, "events", NULL, 1, 1,    RRD_ALGORITHM_INCREMENTAL);
@@ -1394,13 +1396,13 @@ static inline void statsd_private_chart_timer_or_histogram(STATSD_METRIC *m, con
                 , RRDSET_TYPE_AREA
         );
 
-        m->histogram.ext->rd_min = rrddim_add(m->st, "min", NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
-        m->histogram.ext->rd_max = rrddim_add(m->st, "max", NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
-        m->rd_value              = rrddim_add(m->st, "average", NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
-        m->histogram.ext->rd_percentile = rrddim_add(m->st, statsd.histogram_percentile_str, NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
-        m->histogram.ext->rd_median = rrddim_add(m->st, "median", NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
-        m->histogram.ext->rd_stddev = rrddim_add(m->st, "stddev", NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
-        m->histogram.ext->rd_sum = rrddim_add(m->st, "sum", NULL, 1, STATSD_DECIMAL_DETAIL, RRD_ALGORITHM_ABSOLUTE);
+        m->histogram.ext->rd_min = rrddim_add(m->st, "min", NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
+        m->histogram.ext->rd_max = rrddim_add(m->st, "max", NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
+        m->rd_value              = rrddim_add(m->st, "average", NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
+        m->histogram.ext->rd_percentile = rrddim_add(m->st, statsd.histogram_percentile_str, NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
+        m->histogram.ext->rd_median = rrddim_add(m->st, "median", NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
+        m->histogram.ext->rd_stddev = rrddim_add(m->st, "stddev", NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
+        m->histogram.ext->rd_sum = rrddim_add(m->st, "sum", NULL, 1, statsd.decimal_detail, RRD_ALGORITHM_ABSOLUTE);
 
         if(m->options & STATSD_METRIC_OPTION_CHART_DIMENSION_COUNT)
             m->rd_count = rrddim_add(m->st, "events", NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
@@ -1429,7 +1431,7 @@ static inline void statsd_flush_gauge(STATSD_METRIC *m) {
 
     int updated = 0;
     if(m->count && !m->reset) {
-        m->last = (collected_number) (m->gauge.value * STATSD_DECIMAL_DETAIL);
+        m->last = (collected_number) (m->gauge.value * statsd.decimal_detail);
 
         m->reset = 1;
         updated = 1;
@@ -1488,18 +1490,18 @@ static inline void statsd_flush_timer_or_histogram(STATSD_METRIC *m, const char
         long double *series = m->histogram.ext->values;
         sort_series(series, len);
 
-        m->histogram.ext->last_min = (collected_number)roundl(series[0] * STATSD_DECIMAL_DETAIL);
-        m->histogram.ext->last_max = (collected_number)roundl(series[len - 1] * STATSD_DECIMAL_DETAIL);
-        m->last = (collected_number)roundl(average(series, len) * STATSD_DECIMAL_DETAIL);
-        m->histogram.ext->last_median = (collected_number)roundl(median_on_sorted_series(series, len) * STATSD_DECIMAL_DETAIL);
-        m->histogram.ext->last_stddev = (collected_number)roundl(standard_deviation(series, len) * STATSD_DECIMAL_DETAIL);
-        m->histogram.ext->last_sum = (collected_number)roundl(sum(series, len) * STATSD_DECIMAL_DETAIL);
+        m->histogram.ext->last_min = (collected_number)roundl(series[0] * statsd.decimal_detail);
+        m->histogram.ext->last_max = (collected_number)roundl(series[len - 1] * statsd.decimal_detail);
+        m->last = (collected_number)roundl(average(series, len) * statsd.decimal_detail);
+        m->histogram.ext->last_median = (collected_number)roundl(median_on_sorted_series(series, len) * statsd.decimal_detail);
+        m->histogram.ext->last_stddev = (collected_number)roundl(standard_deviation(series, len) * statsd.decimal_detail);
+        m->histogram.ext->last_sum = (collected_number)roundl(sum(series, len) * statsd.decimal_detail);
 
         size_t pct_len = (size_t)floor((double)len * statsd.histogram_percentile / 100.0);
         if(pct_len < 1)
-            m->histogram.ext->last_percentile = (collected_number)(series[0] * STATSD_DECIMAL_DETAIL);
+            m->histogram.ext->last_percentile = (collected_number)(series[0] * statsd.decimal_detail);
         else
-            m->histogram.ext->last_percentile = (collected_number)roundl(average(series, pct_len) * STATSD_DECIMAL_DETAIL);
+            m->histogram.ext->last_percentile = (collected_number)roundl(series[pct_len - 1] * statsd.decimal_detail);
 
         debug(D_STATSD, "STATSD %s metric %s: min " COLLECTED_NUMBER_FORMAT ", max " COLLECTED_NUMBER_FORMAT ", last " COLLECTED_NUMBER_FORMAT ", pcent " COLLECTED_NUMBER_FORMAT ", median " COLLECTED_NUMBER_FORMAT ", stddev " COLLECTED_NUMBER_FORMAT ", sum " COLLECTED_NUMBER_FORMAT,
               dim, m->name, m->histogram.ext->last_min, m->histogram.ext->last_max, m->last, m->histogram.ext->last_percentile, m->histogram.ext->last_median, m->histogram.ext->last_stddev, m->histogram.ext->last_sum);
@@ -1574,7 +1576,7 @@ static inline void check_if_metric_is_for_app(STATSD_INDEX *index, STATSD_METRIC
                         }
                         else if(m->type == STATSD_METRIC_TYPE_HISTOGRAM || m->type == STATSD_METRIC_TYPE_TIMER) {
                             dim->algorithm = RRD_ALGORITHM_ABSOLUTE;
-                            dim->divisor *= STATSD_DECIMAL_DETAIL;
+                            dim->divisor *= statsd.decimal_detail;
 
                             switch(dim->value_type) {
                                 case STATSD_APP_CHART_DIM_VALUE_TYPE_EVENTS:
@@ -1619,7 +1621,7 @@ static inline void check_if_metric_is_for_app(STATSD_INDEX *index, STATSD_METRIC
                             dim->algorithm = statsd_algorithm_for_metric(m);
 
                             if(m->type == STATSD_METRIC_TYPE_GAUGE)
-                                dim->divisor *= STATSD_DECIMAL_DETAIL;
+                                dim->divisor *= statsd.decimal_detail;
                         }
 
                         if(unlikely(chart->st && dim->rd)) {
@@ -1776,6 +1778,7 @@ void *statsd_main(void *ptr) {
     statsd.max_private_charts_hard = (size_t)config_get_number(CONFIG_SECTION_STATSD, "max private charts hard limit", (long long)statsd.max_private_charts * 5);
     statsd.private_charts_memory_mode = rrd_memory_mode_id(config_get(CONFIG_SECTION_STATSD, "private charts memory mode", rrd_memory_mode_name(default_rrd_memory_mode)));
     statsd.private_charts_rrd_history_entries = (int)config_get_number(CONFIG_SECTION_STATSD, "private charts history", default_rrd_history_entries);
+    statsd.decimal_detail = (size_t)config_get_number(CONFIG_SECTION_STATSD, "decimal detail", (long long int)statsd.decimal_detail);
 
     statsd.histogram_percentile = (double)config_get_float(CONFIG_SECTION_STATSD, "histograms and timers percentile (percentThreshold)", statsd.histogram_percentile);
     if(isless(statsd.histogram_percentile, 0) || isgreater(statsd.histogram_percentile, 100)) {
@@ -1922,13 +1925,13 @@ void *statsd_main(void *ptr) {
             , "statsd"
             , NULL
             , "Bytes read by the netdata statsd server"
-            , "kbps"
+            , "kilobits/s"
             , 132003
             , statsd.update_every
             , RRDSET_TYPE_STACKED
     );
-    RRDDIM *rd_bytes_tcp = rrddim_add(st_bytes, "tcp", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
-    RRDDIM *rd_bytes_udp = rrddim_add(st_bytes, "udp", NULL, 8, 1024, RRD_ALGORITHM_INCREMENTAL);
+    RRDDIM *rd_bytes_tcp = rrddim_add(st_bytes, "tcp", NULL, 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
+    RRDDIM *rd_bytes_udp = rrddim_add(st_bytes, "udp", NULL, 8, BITS_IN_A_KILOBIT, RRD_ALGORITHM_INCREMENTAL);
 
     RRDSET *st_packets = rrdset_create_localhost(
             "netdata"
diff --git a/src/storage_number.c b/src/storage_number.c
index 27fe5f2c..05494120 100644
--- a/src/storage_number.c
+++ b/src/storage_number.c
@@ -2,12 +2,13 @@
 
 extern char *print_number_lu_r(char *str, unsigned long uvalue);
 extern char *print_number_llu_r(char *str, unsigned long long uvalue);
+extern char *print_number_llu_r_smart(char *str, unsigned long long uvalue);
 
 storage_number pack_storage_number(calculated_number value, uint32_t flags)
 {
     // bit 32 = sign 0:positive, 1:negative
     // bit 31 = 0:divide, 1:multiply
-    // bit 30, 29, 28 = (multiplier or divider) 0-6 (7 total)
+    // bit 30, 29, 28 = (multiplier or divider) 0-7 (8 total)
     // bit 27, 26, 25 flags
     // bit 24 to bit 1 = the value
 
@@ -105,6 +106,7 @@ calculated_number unpack_storage_number(storage_number value)
     return n;
 }
 
+/*
 int print_calculated_number(char *str, calculated_number value)
 {
     char *wstr = str;
@@ -113,21 +115,14 @@ int print_calculated_number(char *str, calculated_number value)
     if(sign) value = -value;
 
 #ifdef STORAGE_WITH_MATH
-    // without llrint() there are rounding problems
+    // without llrintl() there are rounding problems
     // for example 0.9 becomes 0.89
-    unsigned long long uvalue = (unsigned long long int) llrint(value * (calculated_number)100000);
+    unsigned long long uvalue = (unsigned long long int) llrintl(value * (calculated_number)100000);
 #else
     unsigned long long uvalue = value * (calculated_number)100000;
 #endif
 
-#ifdef ENVIRONMENT32
-    if(uvalue > (unsigned long long)0xffffffff)
-        wstr = print_number_llu_r(str, uvalue);
-    else
-        wstr = print_number_lu_r(str, uvalue);
-#else
-    do *wstr++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10);
-#endif
+    wstr = print_number_llu_r_smart(str, uvalue);
 
     // make sure we have 6 bytes at least
     while((wstr - str) < 6) *wstr++ = '0';
@@ -166,3 +161,62 @@ int print_calculated_number(char *str, calculated_number value)
     // return the buffer length
     return (int) ((wstr - str) + 2 + decimal );
 }
+*/
+
+int print_calculated_number(char *str, calculated_number value) {
+    char integral_str[50], fractional_str[50];
+
+    char *wstr = str;
+
+    if(unlikely(value < 0)) {
+        *wstr++ = '-';
+        value = -value;
+    }
+
+    calculated_number integral, fractional;
+
+#ifdef STORAGE_WITH_MATH
+    fractional = modfl(value, &integral) * 10000000.0;
+#else
+    fractional = ((unsigned long long)(value * 10000000ULL) % 10000000ULL);
+#endif
+
+    char *istre;
+    if(integral == 0.0) {
+        integral_str[0] = '0';
+        istre = &integral_str[1];
+    }
+    else
+        // convert the integral part to string (reversed)
+        istre = print_number_llu_r_smart(integral_str, (unsigned long long)integral);
+
+    // copy reversed the integral string
+    istre--;
+    while( istre >= integral_str ) *wstr++ = *istre--;
+
+    if(fractional != 0.0) {
+        // add a dot
+        *wstr++ = '.';
+
+        // convert the fractional part to string (reversed)
+        char *fstre = print_number_llu_r_smart(fractional_str, (unsigned long long)calculated_number_llrint(fractional));
+
+        // prepend zeros to reach 7 digits length
+        int decimal = 7;
+        int len = (int)(fstre - fractional_str);
+        while(len < decimal) {
+            *wstr++ = '0';
+            len++;
+        }
+
+        char *begin = fractional_str;
+        while(begin < fstre && *begin == '0') begin++;
+
+        // copy reversed the fractional string
+        fstre--;
+        while( fstre >= begin ) *wstr++ = *fstre--;
+    }
+
+    *wstr = '\0';
+    return (int)(wstr - str);
+}
diff --git a/src/storage_number.h b/src/storage_number.h
index 34ed0d89..3c1b6bab 100644
--- a/src/storage_number.h
+++ b/src/storage_number.h
@@ -14,6 +14,10 @@ typedef long double collected_number;
 #define COLLECTED_NUMBER_FORMAT "%0.7Lf"
 */
 
+#define calculated_number_llrint(x) llrintl(x)
+#define calculated_number_round(x) roundl(x)
+#define calculated_number_fabs(x) fabsl(x)
+
 typedef uint32_t storage_number;
 #define STORAGE_NUMBER_FORMAT "%u"
 
@@ -28,7 +32,7 @@ typedef uint32_t storage_number;
 #define SN_FLAGS_MASK       (~(0x6 << 24))
 
 // extract the flags
-#define get_storage_number_flags(value) ((((storage_number)value) & (1 << 24)) | (((storage_number)value) & (2 << 24)) | (((storage_number)value) & (4 << 24)))
+#define get_storage_number_flags(value) ((((storage_number)(value)) & (1 << 24)) | (((storage_number)(value)) & (2 << 24)) | (((storage_number)(value)) & (4 << 24)))
 #define SN_EMPTY_SLOT 0x00000000
 
 // checks
@@ -40,13 +44,13 @@ calculated_number unpack_storage_number(storage_number value);
 
 int print_calculated_number(char *str, calculated_number value);
 
-#define STORAGE_NUMBER_POSITIVE_MAX 167772150000000.0
-#define STORAGE_NUMBER_POSITIVE_MIN 0.00001
-#define STORAGE_NUMBER_NEGATIVE_MAX -0.00001
-#define STORAGE_NUMBER_NEGATIVE_MIN -167772150000000.0
+#define STORAGE_NUMBER_POSITIVE_MAX (167772150000000.0)
+#define STORAGE_NUMBER_POSITIVE_MIN (0.0000001)
+#define STORAGE_NUMBER_NEGATIVE_MAX (-0.0000001)
+#define STORAGE_NUMBER_NEGATIVE_MIN (-167772150000000.0)
 
 // accepted accuracy loss
 #define ACCURACY_LOSS 0.0001
-#define accuracy_loss(t1, t2) ((t1 == t2 || t1 == 0.0 || t2 == 0.0) ? 0.0 : (100.0 - ((t1 > t2) ? (t2 * 100.0 / t1 ) : (t1 * 100.0 / t2))))
+#define accuracy_loss(t1, t2) (((t1) == (t2) || (t1) == 0.0 || (t2) == 0.0) ? 0.0 : (100.0 - (((t1) > (t2)) ? ((t2) * 100.0 / (t1) ) : ((t1) * 100.0 / (t2)))))
 
 #endif /* NETDATA_STORAGE_NUMBER_H */
diff --git a/src/sys_devices_system_edac_mc.c b/src/sys_devices_system_edac_mc.c
index c41ad7fa..7ec98943 100644
--- a/src/sys_devices_system_edac_mc.c
+++ b/src/sys_devices_system_edac_mc.c
@@ -27,7 +27,7 @@ static void find_all_mc() {
     char *dirname = config_get("plugin:proc:/sys/devices/system/edac/mc", "directory to monitor", name);
 
     DIR *dir = opendir(dirname);
-    if(!dir) {
+    if(unlikely(!dir)) {
         error("Cannot read ECC memory errors directory '%s'", dirname);
         return;
     }
@@ -132,21 +132,30 @@ int do_proc_sys_devices_system_edac_mc(int update_every, usec_t dt) {
         static RRDSET *ce_st = NULL;
 
         if(unlikely(!ce_st)) {
-            ce_st = rrdset_find_localhost("mem.ecc_ce");
-            if(unlikely(!ce_st))
-                ce_st = rrdset_create_localhost("mem", "ecc_ce", NULL, "ecc", NULL, "ECC Memory Correctable Errors"
-                                                , "errors", 6600, update_every, RRDSET_TYPE_LINE);
-
-            for(m = mc_root; m; m = m->next)
-                if(m->ce_count_filename)
-                    m->ce_rd = rrddim_add(ce_st, m->name, NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            ce_st = rrdset_create_localhost(
+                    "mem"
+                    , "ecc_ce"
+                    , NULL
+                    , "ecc"
+                    , NULL
+                    , "ECC Memory Correctable Errors"
+                    , "errors"
+                    , 6600
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
         }
         else
             rrdset_next(ce_st);
 
-        for(m = mc_root; m; m = m->next)
-            if(m->ce_count_filename && m->ce_updated)
+        for(m = mc_root; m; m = m->next) {
+            if (m->ce_count_filename && m->ce_updated) {
+                if(unlikely(!m->ce_rd))
+                    m->ce_rd = rrddim_add(ce_st, m->name, NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+
                 rrddim_set_by_pointer(ce_st, m->ce_rd, m->ce_count);
+            }
+        }
 
         rrdset_done(ce_st);
     }
@@ -159,22 +168,30 @@ int do_proc_sys_devices_system_edac_mc(int update_every, usec_t dt) {
         static RRDSET *ue_st = NULL;
 
         if(unlikely(!ue_st)) {
-            ue_st = rrdset_find_localhost("mem.ecc_ue");
-
-            if(unlikely(!ue_st))
-                ue_st = rrdset_create_localhost("mem", "ecc_ue", NULL, "ecc", NULL, "ECC Memory Uncorrectable Errors"
-                                                , "errors", 6610, update_every, RRDSET_TYPE_LINE);
-
-            for(m = mc_root; m; m = m->next)
-                if(m->ue_count_filename)
-                    m->ue_rd = rrddim_add(ue_st, m->name, NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+            ue_st = rrdset_create_localhost(
+                    "mem"
+                    , "ecc_ue"
+                    , NULL
+                    , "ecc"
+                    , NULL
+                    , "ECC Memory Uncorrectable Errors"
+                    , "errors"
+                    , 6610
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
         }
         else
             rrdset_next(ue_st);
 
-        for(m = mc_root; m; m = m->next)
-            if(m->ue_count_filename && m->ue_updated)
+        for(m = mc_root; m; m = m->next) {
+            if (m->ue_count_filename && m->ue_updated) {
+                if(unlikely(!m->ue_rd))
+                    m->ue_rd = rrddim_add(ue_st, m->name, NULL, 1, 1, RRD_ALGORITHM_INCREMENTAL);
+
                 rrddim_set_by_pointer(ue_st, m->ue_rd, m->ue_count);
+            }
+        }
 
         rrdset_done(ue_st);
     }
diff --git a/src/sys_fs_cgroup.c b/src/sys_fs_cgroup.c
index 0f9c8854..c047547e 100644
--- a/src/sys_fs_cgroup.c
+++ b/src/sys_fs_cgroup.c
@@ -41,7 +41,7 @@ static char *cgroup_memory_base = NULL;
 static char *cgroup_devices_base = NULL;
 
 static int cgroup_root_count = 0;
-static int cgroup_root_max = 500;
+static int cgroup_root_max = 1000;
 static int cgroup_max_depth = 0;
 
 static SIMPLE_PATTERN *enabled_cgroup_patterns = NULL;
@@ -50,6 +50,7 @@ static SIMPLE_PATTERN *enabled_cgroup_renames = NULL;
 static SIMPLE_PATTERN *systemd_services_cgroups = NULL;
 
 static char *cgroups_rename_script = NULL;
+static char *cgroups_network_interface_script = NULL;
 
 static int cgroups_check = 0;
 
@@ -103,7 +104,7 @@ void read_cgroup_plugin_configuration() {
     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
     if(!mi) {
-        error("Cannot find cgroup cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
+        error("CGROUP: cannot find cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
         s = "/sys/fs/cgroup/cpuacct";
     }
     else s = mi->mount_point;
@@ -113,7 +114,7 @@ void read_cgroup_plugin_configuration() {
     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio");
     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio");
     if(!mi) {
-        error("Cannot find cgroup blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
+        error("CGROUP: cannot find blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
         s = "/sys/fs/cgroup/blkio";
     }
     else s = mi->mount_point;
@@ -123,7 +124,7 @@ void read_cgroup_plugin_configuration() {
     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory");
     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory");
     if(!mi) {
-        error("Cannot find cgroup memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
+        error("CGROUP: cannot find memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
         s = "/sys/fs/cgroup/memory";
     }
     else s = mi->mount_point;
@@ -133,7 +134,7 @@ void read_cgroup_plugin_configuration() {
     mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "devices");
     if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "devices");
     if(!mi) {
-        error("Cannot find cgroup devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
+        error("CGROUP: cannot find devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
         s = "/sys/fs/cgroup/devices";
     }
     else s = mi->mount_point;
@@ -166,7 +167,7 @@ void read_cgroup_plugin_configuration() {
                     " !/docker "
                     " !/libvirt "
                     " !/lxc "
-                    " !/lxc/*/ns "                         //  #1397
+                    " !/lxc/*/* "                          //  #1397 #2649
                     " !/machine "
                     " !/qemu "
                     " !/system "
@@ -184,13 +185,16 @@ void read_cgroup_plugin_configuration() {
                     " !/systemd "
                     " !/user "
                     " !/user.slice "
-                    " !/lxc/*/ns/* "                       //  #2161
+                    " !/lxc/*/* "                         //  #2161 #2649
                     " * "
             ), SIMPLE_PATTERN_EXACT);
 
     snprintfz(filename, FILENAME_MAX, "%s/cgroup-name.sh", netdata_configured_plugins_dir);
     cgroups_rename_script = config_get("plugin:cgroups", "script to get cgroup names", filename);
 
+    snprintfz(filename, FILENAME_MAX, "%s/cgroup-network", netdata_configured_plugins_dir);
+    cgroups_network_interface_script = config_get("plugin:cgroups", "script to get cgroup network interfaces", filename);
+
     enabled_cgroup_renames = simple_pattern_create(
             config_get("plugin:cgroups", "run script to rename cgroups matching",
                     " *.scope "
@@ -329,6 +333,12 @@ struct cpuacct_usage {
     unsigned long long *cpu_percpu;
 };
 
+struct cgroup_network_interface {
+    const char *host_device;
+    const char *container_device;
+    struct cgroup_network_interface *next;
+};
+
 #define CGROUP_OPTIONS_DISABLED_DUPLICATE   0x00000001
 #define CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE 0x00000002
 
@@ -360,6 +370,8 @@ struct cgroup {
     struct blkio io_merged;                     // operations
     struct blkio io_queued;                     // operations
 
+    struct cgroup_network_interface *interfaces;
+
     // per cgroup charts
     RRDSET *st_cpu;
     RRDSET *st_cpu_per_core;
@@ -433,7 +445,7 @@ static inline void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) {
         unsigned long i, lines = procfile_lines(ff);
 
         if(unlikely(lines < 1)) {
-            error("File '%s' should have 1+ lines.", cp->filename);
+            error("CGROUP: file '%s' should have 1+ lines.", cp->filename);
             cp->updated = 0;
             return;
         }
@@ -475,7 +487,7 @@ static inline void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) {
         }
 
         if(unlikely(procfile_lines(ff) < 1)) {
-            error("File '%s' should have 1+ lines but has %zu.", ca->filename, procfile_lines(ff));
+            error("CGROUP: file '%s' should have 1+ lines but has %zu.", ca->filename, procfile_lines(ff));
             ca->updated = 0;
             return;
         }
@@ -539,7 +551,7 @@ static inline void cgroup_read_blkio(struct blkio *io) {
         unsigned long i, lines = procfile_lines(ff);
 
         if(unlikely(lines < 1)) {
-            error("File '%s' should have 1+ lines.", io->filename);
+            error("CGROUP: file '%s' should have 1+ lines.", io->filename);
             io->updated = 0;
             return;
         }
@@ -612,7 +624,7 @@ static inline void cgroup_read_memory(struct memory *mem) {
         unsigned long i, lines = procfile_lines(ff);
 
         if(unlikely(lines < 1)) {
-            error("File '%s' should have 1+ lines.", mem->filename_detailed);
+            error("CGROUP: file '%s' should have 1+ lines.", mem->filename_detailed);
             mem->updated_detailed = 0;
             goto memory_next;
         }
@@ -718,6 +730,77 @@ static inline void read_all_cgroups(struct cgroup *root) {
 }
 
 // ----------------------------------------------------------------------------
+// cgroup network interfaces
+
+#define CGROUP_NETWORK_INTERFACE_MAX_LINE 2048
+static inline void read_cgroup_network_interfaces(struct cgroup *cg) {
+    debug(D_CGROUP, "looking for the network interfaces of cgroup '%s' with chart id '%s' and title '%s'", cg->id, cg->chart_id, cg->chart_title);
+
+    pid_t cgroup_pid;
+    char buffer[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1];
+
+    snprintfz(buffer, CGROUP_NETWORK_INTERFACE_MAX_LINE, "exec %s --cgroup '%s%s'", cgroups_network_interface_script, cgroup_cpuacct_base, cg->id);
+
+    debug(D_CGROUP, "executing command '%s' for cgroup '%s'", buffer, cg->id);
+    FILE *fp = mypopen(buffer, &cgroup_pid);
+    if(fp) {
+        char *s;
+        while((s = fgets(buffer, CGROUP_NETWORK_INTERFACE_MAX_LINE, fp))) {
+            trim(s);
+
+            if(*s && *s != '\n') {
+                char *t = s;
+                while(*t && *t != ' ') t++;
+                if(*t == ' ') {
+                    *t = '\0';
+                    t++;
+                }
+
+                if(!*s) {
+                    error("CGROUP: empty host interface returned by script");
+                    continue;
+                }
+
+                if(!*t) {
+                    error("CGROUP: empty container interface returned by script");
+                    continue;
+                }
+
+                struct cgroup_network_interface *i = callocz(1, sizeof(struct cgroup_network_interface));
+                i->host_device = strdupz(s);
+                i->container_device = strdupz(t);
+                i->next = cg->interfaces;
+                cg->interfaces = i;
+
+                info("CGROUP: cgroup '%s' has network interface '%s' as '%s'", cg->id, i->host_device, i->container_device);
+
+                // register a device rename to proc_net_dev.c
+                netdev_rename_device_add(i->host_device, i->container_device, cg->chart_id);
+            }
+        }
+
+        mypclose(fp, cgroup_pid);
+        // debug(D_CGROUP, "closed command for cgroup '%s'", cg->id);
+    }
+    else
+        error("CGROUP: cannot popen(\"%s\", \"r\").", buffer);
+}
+
+static inline void free_cgroup_network_interfaces(struct cgroup *cg) {
+    while(cg->interfaces) {
+        struct cgroup_network_interface *i = cg->interfaces;
+        cg->interfaces = i->next;
+
+        // delete the registration of proc_net_dev rename
+        netdev_rename_device_del(i->host_device);
+
+        freez((void *)i->host_device);
+        freez((void *)i->container_device);
+        freez((void *)i);
+    }
+}
+
+// ----------------------------------------------------------------------------
 // add/remove/find cgroup objects
 
 #define CGROUP_CHARTID_LINE_MAX 1024
@@ -775,7 +858,7 @@ static inline void cgroup_get_chart_name(struct cgroup *cg) {
         }
     }
     else
-        error("CGROUP: Cannot popen(\"%s\", \"r\").", buffer);
+        error("CGROUP: cannot popen(\"%s\", \"r\").", buffer);
 }
 
 static inline struct cgroup *cgroup_add(const char *id) {
@@ -783,7 +866,7 @@ static inline struct cgroup *cgroup_add(const char *id) {
     debug(D_CGROUP, "adding to list, cgroup with id '%s'", id);
 
     if(cgroup_root_count >= cgroup_root_max) {
-        info("Maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
+        info("CGROUP: maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
         return NULL;
     }
 
@@ -872,7 +955,7 @@ static inline struct cgroup *cgroup_add(const char *id) {
         for (t = cgroup_root; t; t = t->next) {
             if (t != cg && t->enabled && t->hash_chart == cg->hash_chart && !strcmp(t->chart_id, cg->chart_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'.",
+                    error("CGROUP: 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);
@@ -880,7 +963,7 @@ static inline struct cgroup *cgroup_add(const char *id) {
                     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'.",
+                    error("CGROUP: 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);
@@ -893,6 +976,9 @@ static inline struct cgroup *cgroup_add(const char *id) {
         }
     }
 
+    if(cg->enabled && !(cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE))
+        read_cgroup_network_interfaces(cg);
+
     debug(D_CGROUP, "ADDED CGROUP: '%s' with chart id '%s' and title '%s' as %s (default was %s)", cg->id, cg->chart_id, cg->chart_title, (cg->enabled)?"enabled":"disabled", (def)?"enabled":"disabled");
 
     return cg;
@@ -916,6 +1002,8 @@ static inline void cgroup_free(struct cgroup *cg) {
     if(cg->st_queued_ops)            rrdset_is_obsolete(cg->st_queued_ops);
     if(cg->st_merged_ops)            rrdset_is_obsolete(cg->st_merged_ops);
 
+    free_cgroup_network_interfaces(cg);
+
     freez(cg->cpuacct_usage.cpu_percpu);
 
     freez(cg->cpuacct_stat.filename);
@@ -979,7 +1067,7 @@ static inline void found_subdir_in_dir(const char *dir) {
                     depth++;
 
             if(depth > cgroup_max_depth) {
-                info("cgroup '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
+                info("CGROUP: '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth);
                 return;
             }
         }
@@ -1004,7 +1092,7 @@ static inline int find_dir_in_subdirs(const char *base, const char *this, void (
 
     DIR *dir = opendir(this);
     if(!dir) {
-        error("Cannot read cgroups directory '%s'", base);
+        error("CGROUP: cannot read directory '%s'", base);
         return ret;
     }
     ret = 1;
@@ -1110,7 +1198,7 @@ static inline void find_all_cgroups() {
         if(find_dir_in_subdirs(cgroup_cpuacct_base, NULL, found_subdir_in_dir) == -1) {
             cgroup_enable_cpuacct_stat =
             cgroup_enable_cpuacct_usage = CONFIG_BOOLEAN_NO;
-            error("disabled CGROUP cpu statistics.");
+            error("CGROUP: disabled cpu statistics.");
         }
     }
 
@@ -1122,7 +1210,7 @@ static inline void find_all_cgroups() {
             cgroup_enable_blkio_throttle_ops =
             cgroup_enable_blkio_merged_ops =
             cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_NO;
-            error("disabled CGROUP blkio statistics.");
+            error("CGROUP: disabled blkio statistics.");
         }
     }
 
@@ -1132,14 +1220,14 @@ static inline void find_all_cgroups() {
             cgroup_enable_detailed_memory =
             cgroup_enable_swap =
             cgroup_enable_memory_failcnt = CONFIG_BOOLEAN_NO;
-            error("disabled CGROUP memory statistics.");
+            error("CGROUP: disabled memory statistics.");
         }
     }
 
     if(cgroup_search_in_devices) {
         if(find_dir_in_subdirs(cgroup_devices_base, NULL, found_subdir_in_dir) == -1) {
             cgroup_search_in_devices = 0;
-            error("disabled CGROUP devices statistics.");
+            error("CGROUP: disabled devices statistics.");
         }
     }
 
@@ -2508,13 +2596,13 @@ void update_cgroup_charts(int update_every) {
 void *cgroups_main(void *ptr) {
     struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
 
-    info("CGROUP Plugin thread created with task id %d", gettid());
+    info("CGROUP plugin thread created with task id %d", gettid());
 
     if(pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, NULL) != 0)
-        error("Cannot set pthread cancel type to DEFERRED.");
+        error("CGROUP: cannot set pthread cancel type to DEFERRED.");
 
     if(pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL) != 0)
-        error("Cannot set pthread cancel state to ENABLE.");
+        error("CGROUP: cannot set pthread cancel state to ENABLE.");
 
     struct rusage thread;
 
diff --git a/src/sys_kernel_mm_ksm.c b/src/sys_kernel_mm_ksm.c
index 76d80853..6b04ef28 100644
--- a/src/sys_kernel_mm_ksm.c
+++ b/src/sys_kernel_mm_ksm.c
@@ -5,18 +5,18 @@ typedef struct ksm_name_value {
     unsigned long long value;
 } KSM_NAME_VALUE;
 
-#define PAGES_SHARED 0
-#define PAGES_SHARING 1
+#define PAGES_SHARED   0
+#define PAGES_SHARING  1
 #define PAGES_UNSHARED 2
 #define PAGES_VOLATILE 3
-#define PAGES_TO_SCAN 4
+#define PAGES_TO_SCAN  4
 
 KSM_NAME_VALUE values[] = {
-        [PAGES_SHARED] = { "/sys/kernel/mm/ksm/pages_shared", 0ULL },
-        [PAGES_SHARING] = { "/sys/kernel/mm/ksm/pages_sharing", 0ULL },
+        [PAGES_SHARED]   = { "/sys/kernel/mm/ksm/pages_shared",   0ULL },
+        [PAGES_SHARING]  = { "/sys/kernel/mm/ksm/pages_sharing",  0ULL },
         [PAGES_UNSHARED] = { "/sys/kernel/mm/ksm/pages_unshared", 0ULL },
         [PAGES_VOLATILE] = { "/sys/kernel/mm/ksm/pages_volatile", 0ULL },
-        [PAGES_TO_SCAN] = { "/sys/kernel/mm/ksm/pages_to_scan", 0ULL },
+        [PAGES_TO_SCAN]  = { "/sys/kernel/mm/ksm/pages_to_scan",  0ULL },
 };
 
 int do_sys_kernel_mm_ksm(int update_every, usec_t dt) {
@@ -24,117 +24,168 @@ int do_sys_kernel_mm_ksm(int update_every, usec_t dt) {
     static procfile *ff_pages_shared = NULL, *ff_pages_sharing = NULL, *ff_pages_unshared = NULL, *ff_pages_volatile = NULL, *ff_pages_to_scan = NULL;
     static long page_size = -1;
 
-    if(page_size == -1)
+    if(unlikely(page_size == -1))
         page_size = sysconf(_SC_PAGESIZE);
 
-    if(!ff_pages_shared) {
+    if(unlikely(!ff_pages_shared)) {
         snprintfz(values[PAGES_SHARED].filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/kernel/mm/ksm/pages_shared");
         snprintfz(values[PAGES_SHARED].filename, FILENAME_MAX, "%s", config_get("plugin:proc:/sys/kernel/mm/ksm", "/sys/kernel/mm/ksm/pages_shared", values[PAGES_SHARED].filename));
         ff_pages_shared = procfile_open(values[PAGES_SHARED].filename, " \t:", PROCFILE_FLAG_DEFAULT);
     }
 
-    if(!ff_pages_sharing) {
+    if(unlikely(!ff_pages_sharing)) {
         snprintfz(values[PAGES_SHARING].filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/kernel/mm/ksm/pages_sharing");
         snprintfz(values[PAGES_SHARING].filename, FILENAME_MAX, "%s", config_get("plugin:proc:/sys/kernel/mm/ksm", "/sys/kernel/mm/ksm/pages_sharing", values[PAGES_SHARING].filename));
         ff_pages_sharing = procfile_open(values[PAGES_SHARING].filename, " \t:", PROCFILE_FLAG_DEFAULT);
     }
 
-    if(!ff_pages_unshared) {
+    if(unlikely(!ff_pages_unshared)) {
         snprintfz(values[PAGES_UNSHARED].filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/kernel/mm/ksm/pages_unshared");
         snprintfz(values[PAGES_UNSHARED].filename, FILENAME_MAX, "%s", config_get("plugin:proc:/sys/kernel/mm/ksm", "/sys/kernel/mm/ksm/pages_unshared", values[PAGES_UNSHARED].filename));
         ff_pages_unshared = procfile_open(values[PAGES_UNSHARED].filename, " \t:", PROCFILE_FLAG_DEFAULT);
     }
 
-    if(!ff_pages_volatile) {
+    if(unlikely(!ff_pages_volatile)) {
         snprintfz(values[PAGES_VOLATILE].filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/kernel/mm/ksm/pages_volatile");
         snprintfz(values[PAGES_VOLATILE].filename, FILENAME_MAX, "%s", config_get("plugin:proc:/sys/kernel/mm/ksm", "/sys/kernel/mm/ksm/pages_volatile", values[PAGES_VOLATILE].filename));
         ff_pages_volatile = procfile_open(values[PAGES_VOLATILE].filename, " \t:", PROCFILE_FLAG_DEFAULT);
     }
 
-    if(!ff_pages_to_scan) {
+    if(unlikely(!ff_pages_to_scan)) {
         snprintfz(values[PAGES_TO_SCAN].filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/kernel/mm/ksm/pages_to_scan");
         snprintfz(values[PAGES_TO_SCAN].filename, FILENAME_MAX, "%s", config_get("plugin:proc:/sys/kernel/mm/ksm", "/sys/kernel/mm/ksm/pages_to_scan", values[PAGES_TO_SCAN].filename));
         ff_pages_to_scan = procfile_open(values[PAGES_TO_SCAN].filename, " \t:", PROCFILE_FLAG_DEFAULT);
     }
 
-    if(!ff_pages_shared || !ff_pages_sharing || !ff_pages_unshared || !ff_pages_volatile || !ff_pages_to_scan) return 1;
+    if(unlikely(!ff_pages_shared || !ff_pages_sharing || !ff_pages_unshared || !ff_pages_volatile || !ff_pages_to_scan))
+        return 1;
 
     unsigned long long pages_shared = 0, pages_sharing = 0, pages_unshared = 0, pages_volatile = 0, pages_to_scan = 0, offered = 0, saved = 0;
 
     ff_pages_shared = procfile_readall(ff_pages_shared);
-    if(!ff_pages_shared) return 0; // we return 0, so that we will retry to open it next time
+    if(unlikely(!ff_pages_shared)) return 0; // we return 0, so that we will retry to open it next time
     pages_shared = str2ull(procfile_lineword(ff_pages_shared, 0, 0));
 
     ff_pages_sharing = procfile_readall(ff_pages_sharing);
-    if(!ff_pages_sharing) return 0; // we return 0, so that we will retry to open it next time
+    if(unlikely(!ff_pages_sharing)) return 0; // we return 0, so that we will retry to open it next time
     pages_sharing = str2ull(procfile_lineword(ff_pages_sharing, 0, 0));
 
     ff_pages_unshared = procfile_readall(ff_pages_unshared);
-    if(!ff_pages_unshared) return 0; // we return 0, so that we will retry to open it next time
+    if(unlikely(!ff_pages_unshared)) return 0; // we return 0, so that we will retry to open it next time
     pages_unshared = str2ull(procfile_lineword(ff_pages_unshared, 0, 0));
 
     ff_pages_volatile = procfile_readall(ff_pages_volatile);
-    if(!ff_pages_volatile) return 0; // we return 0, so that we will retry to open it next time
+    if(unlikely(!ff_pages_volatile)) return 0; // we return 0, so that we will retry to open it next time
     pages_volatile = str2ull(procfile_lineword(ff_pages_volatile, 0, 0));
 
     ff_pages_to_scan = procfile_readall(ff_pages_to_scan);
-    if(!ff_pages_to_scan) return 0; // we return 0, so that we will retry to open it next time
+    if(unlikely(!ff_pages_to_scan)) return 0; // we return 0, so that we will retry to open it next time
     pages_to_scan = str2ull(procfile_lineword(ff_pages_to_scan, 0, 0));
 
     offered = pages_sharing + pages_shared + pages_unshared + pages_volatile;
     saved = pages_sharing - pages_shared;
 
-    if(!offered || !pages_to_scan) return 0;
-
-    RRDSET *st;
+    if(unlikely(!offered || !pages_to_scan)) return 0;
 
     // --------------------------------------------------------------------
 
-    st = rrdset_find_localhost("mem.ksm");
-    if(!st) {
-        st = rrdset_create_localhost("mem", "ksm", NULL, "ksm", NULL, "Kernel Same Page Merging", "MB", 5000
-                                     , update_every, RRDSET_TYPE_AREA);
-
-        rrddim_add(st, "shared", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-        rrddim_add(st, "unshared", NULL, -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-        rrddim_add(st, "sharing", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-        rrddim_add(st, "volatile", NULL, -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-        rrddim_add(st, "to_scan", "to scan", -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+    {
+        static RRDSET *st_mem_ksm = NULL;
+        static RRDDIM *rd_shared = NULL, *rd_unshared = NULL, *rd_sharing = NULL, *rd_volatile = NULL, *rd_to_scan = NULL;
+
+        if (unlikely(!st_mem_ksm)) {
+            st_mem_ksm = rrdset_create_localhost(
+                    "mem"
+                    , "ksm"
+                    , NULL
+                    , "ksm"
+                    , NULL
+                    , "Kernel Same Page Merging"
+                    , "MB"
+                    , 5000
+                    , update_every
+                    , RRDSET_TYPE_AREA
+            );
+
+            rd_shared   = rrddim_add(st_mem_ksm, "shared",   NULL,      1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_unshared = rrddim_add(st_mem_ksm, "unshared", NULL,     -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_sharing  = rrddim_add(st_mem_ksm, "sharing",  NULL,      1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_volatile = rrddim_add(st_mem_ksm, "volatile", NULL,     -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_to_scan  = rrddim_add(st_mem_ksm, "to_scan", "to scan", -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+        }
+        else
+            rrdset_next(st_mem_ksm);
+
+        rrddim_set_by_pointer(st_mem_ksm, rd_shared,   pages_shared   * page_size);
+        rrddim_set_by_pointer(st_mem_ksm, rd_unshared, pages_unshared * page_size);
+        rrddim_set_by_pointer(st_mem_ksm, rd_sharing,  pages_sharing  * page_size);
+        rrddim_set_by_pointer(st_mem_ksm, rd_volatile, pages_volatile * page_size);
+        rrddim_set_by_pointer(st_mem_ksm, rd_to_scan,  pages_to_scan  * page_size);
+
+        rrdset_done(st_mem_ksm);
     }
-    else rrdset_next(st);
-
-    rrddim_set(st, "shared", pages_shared * page_size);
-    rrddim_set(st, "unshared", pages_unshared * page_size);
-    rrddim_set(st, "sharing", pages_sharing * page_size);
-    rrddim_set(st, "volatile", pages_volatile * page_size);
-    rrddim_set(st, "to_scan", pages_to_scan * page_size);
-    rrdset_done(st);
-
-    st = rrdset_find_localhost("mem.ksm_savings");
-    if(!st) {
-        st = rrdset_create_localhost("mem", "ksm_savings", NULL, "ksm", NULL, "Kernel Same Page Merging Savings", "MB"
-                                     , 5001, update_every, RRDSET_TYPE_AREA);
-
-        rrddim_add(st, "savings", NULL, -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-        rrddim_add(st, "offered", NULL, 1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
-    }
-    else rrdset_next(st);
-
-    rrddim_set(st, "savings", saved * page_size);
-    rrddim_set(st, "offered", offered * page_size);
-    rrdset_done(st);
 
-    st = rrdset_find_localhost("mem.ksm_ratios");
-    if(!st) {
-        st = rrdset_create_localhost("mem", "ksm_ratios", NULL, "ksm", NULL, "Kernel Same Page Merging Effectiveness"
-                                     , "percentage", 5002, update_every, RRDSET_TYPE_LINE);
+    // --------------------------------------------------------------------
 
-        rrddim_add(st, "savings", NULL, 1, 10000, RRD_ALGORITHM_ABSOLUTE);
+    {
+        static RRDSET *st_mem_ksm_savings = NULL;
+        static RRDDIM *rd_savings = NULL, *rd_offered = NULL;
+
+        if (unlikely(!st_mem_ksm_savings)) {
+            st_mem_ksm_savings = rrdset_create_localhost(
+                    "mem"
+                    , "ksm_savings"
+                    , NULL
+                    , "ksm"
+                    , NULL
+                    , "Kernel Same Page Merging Savings"
+                    , "MB"
+                    , 5001
+                    , update_every
+                    , RRDSET_TYPE_AREA
+            );
+
+            rd_savings = rrddim_add(st_mem_ksm_savings, "savings", NULL, -1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+            rd_offered = rrddim_add(st_mem_ksm_savings, "offered", NULL,  1, 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
+        }
+        else
+            rrdset_next(st_mem_ksm_savings);
+
+        rrddim_set_by_pointer(st_mem_ksm_savings, rd_savings, saved * page_size);
+        rrddim_set_by_pointer(st_mem_ksm_savings, rd_offered, offered * page_size);
+
+        rrdset_done(st_mem_ksm_savings);
     }
-    else rrdset_next(st);
 
-    rrddim_set(st, "savings", (saved * 1000000) / offered);
-    rrdset_done(st);
+    // --------------------------------------------------------------------
+
+    {
+        static RRDSET *st_mem_ksm_ratios = NULL;
+        static RRDDIM *rd_savings = NULL;
+
+        if (unlikely(!st_mem_ksm_ratios)) {
+            st_mem_ksm_ratios = rrdset_create_localhost(
+                    "mem"
+                    , "ksm_ratios"
+                    , NULL
+                    , "ksm"
+                    , NULL
+                    , "Kernel Same Page Merging Effectiveness"
+                    , "percentage"
+                    , 5002
+                    , update_every
+                    , RRDSET_TYPE_LINE
+            );
+
+            rd_savings = rrddim_add(st_mem_ksm_ratios, "savings", NULL, 1, 10000, RRD_ALGORITHM_ABSOLUTE);
+        }
+        else
+            rrdset_next(st_mem_ksm_ratios);
+
+        rrddim_set_by_pointer(st_mem_ksm_ratios, rd_savings, (saved * 1000000) / offered);
+
+        rrdset_done(st_mem_ksm_ratios);
+    }
 
     return 0;
 }
diff --git a/src/unit_test.c b/src/unit_test.c
index 9b008138..3c963211 100644
--- a/src/unit_test.c
+++ b/src/unit_test.c
@@ -31,8 +31,8 @@ int check_storage_number(calculated_number n, int debug) {
             CALCULATED_NUMBER_FORMAT " re-parsed from printed (diff " CALCULATED_NUMBER_FORMAT ", " CALCULATED_NUMBER_FORMAT "%%)\n\n",
             n,
             d, s, ddiff, dcdiff,
-            buffer,
-            len, p, pdiff, pcdiff
+            buffer, len,
+            p, pdiff, pcdiff
         );
         if(len != strlen(buffer)) fprintf(stderr, "ERROR: printed number %s is reported to have length %zu but it has %zu\n", buffer, len, strlen(buffer));
         if(dcdiff > ACCURACY_LOSS) fprintf(stderr, "WARNING: packing number " CALCULATED_NUMBER_FORMAT " has accuracy loss %0.7Lf %%\n", n, dcdiff);
@@ -45,6 +45,19 @@ int check_storage_number(calculated_number n, int debug) {
     return 0;
 }
 
+calculated_number storage_number_min(calculated_number n) {
+    calculated_number r = 1, last;
+
+    do {
+        last = n;
+        n /= 2.0;
+        storage_number t = pack_storage_number(n, SN_EXISTS);
+        r = unpack_storage_number(t);
+    } while(r != 0.0 && r != last);
+
+    return last;
+}
+
 void benchmark_storage_number(int loop, int multiplier) {
     int i, j;
     calculated_number n, d;
@@ -73,10 +86,10 @@ void benchmark_storage_number(int loop, int multiplier) {
     }
 
     fprintf(stderr, "\nNETDATA FLOATING POINT\n");
-    fprintf(stderr, "MIN POSITIVE VALUE " CALCULATED_NUMBER_FORMAT "\n", (calculated_number)STORAGE_NUMBER_POSITIVE_MIN);
+    fprintf(stderr, "MIN POSITIVE VALUE " CALCULATED_NUMBER_FORMAT "\n", storage_number_min(1));
     fprintf(stderr, "MAX POSITIVE VALUE " CALCULATED_NUMBER_FORMAT "\n", (calculated_number)STORAGE_NUMBER_POSITIVE_MAX);
     fprintf(stderr, "MIN NEGATIVE VALUE " CALCULATED_NUMBER_FORMAT "\n", (calculated_number)STORAGE_NUMBER_NEGATIVE_MIN);
-    fprintf(stderr, "MAX NEGATIVE VALUE " CALCULATED_NUMBER_FORMAT "\n", (calculated_number)STORAGE_NUMBER_NEGATIVE_MAX);
+    fprintf(stderr, "MAX NEGATIVE VALUE " CALCULATED_NUMBER_FORMAT "\n", -storage_number_min(1));
     fprintf(stderr, "Maximum accuracy loss: " CALCULATED_NUMBER_FORMAT "%%\n\n\n", (calculated_number)ACCURACY_LOSS);
 
     // ------------------------------------------------------------------------
@@ -231,7 +244,7 @@ int unit_test_storage()
 
 int unit_test_str2ld() {
     char *values[] = {
-            "1.234567", "-35.6", "0.00123", "23842384234234.2", ".1", "1.2e-10",
+            "1.2345678", "-35.6", "0.00123", "23842384234234.2", ".1", "1.2e-10",
             "hello", "1wrong", "nan", "inf", NULL
     };
 
@@ -269,6 +282,36 @@ int unit_test_str2ld() {
     return 0;
 }
 
+int unit_test_buffer() {
+    BUFFER *wb = buffer_create(1);
+    char string[2048 + 1];
+    char final[9000 + 1];
+    int i;
+
+    for(i = 0; i < 2048; i++)
+        string[i] = (char)((i % 24) + 'a');
+    string[2048] = '\0';
+
+    const char *fmt = "string1: %s\nstring2: %s\nstring3: %s\nstring4: %s";
+    buffer_sprintf(wb, fmt, string, string, string, string);
+    snprintfz(final, 9000, fmt, string, string, string, string);
+
+    const char *s = buffer_tostring(wb);
+
+    if(buffer_strlen(wb) != strlen(final) || strcmp(s, final) != 0) {
+        fprintf(stderr, "\nbuffer_sprintf() is faulty.\n");
+        fprintf(stderr, "\nstring  : %s (length %zu)\n", string, strlen(string));
+        fprintf(stderr, "\nbuffer  : %s (length %zu)\n", s, buffer_strlen(wb));
+        fprintf(stderr, "\nexpected: %s (length %zu)\n", final, strlen(final));
+        buffer_free(wb);
+        return -1;
+    }
+
+    fprintf(stderr, "buffer_sprintf() works as expected.\n");
+    buffer_free(wb);
+    return 0;
+}
+
 // --------------------------------------------------------------------------------------------------------------------
 
 struct feed_values {
@@ -994,7 +1037,7 @@ int run_test(struct test *test)
     for(c = 0 ; c < max ; c++) {
         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;
+        int same = (calculated_number_round(v * 10000000.0) == calculated_number_round(n * 10000000.0))?1:0;
         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,
@@ -1005,7 +1048,7 @@ int run_test(struct test *test)
         if(rd2) {
             v = unpack_storage_number(rd2->values[c]);
             n = test->results2[c];
-            same = (roundl(v * 10000000.0) == roundl(n * 10000000.0))?1:0;
+            same = (calculated_number_round(v * 10000000.0) == calculated_number_round(n * 10000000.0))?1:0;
             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,
@@ -1019,8 +1062,7 @@ int run_test(struct test *test)
 
 static int test_variable_renames(void) {
     fprintf(stderr, "Creating chart\n");
-    RRDSET *st = rrdset_create_localhost("chart", "ID", NULL, "family", "context", "Unit Testing", "a value", 1, 1
-                                         , RRDSET_TYPE_LINE);
+    RRDSET *st = rrdset_create_localhost("chart", "ID", NULL, "family", "context", "Unit Testing", "a value", 1, 1, RRDSET_TYPE_LINE);
     fprintf(stderr, "Created chart with id '%s', name '%s'\n", st->id, st->name);
 
     fprintf(stderr, "Creating dimension DIM1\n");
diff --git a/src/unit_test.h b/src/unit_test.h
index 3240b5f0..68ed61fc 100644
--- a/src/unit_test.h
+++ b/src/unit_test.h
@@ -5,5 +5,6 @@ extern int unit_test_storage(void);
 extern int unit_test(long delay, long shift);
 extern int run_all_mockup_tests(void);
 extern int unit_test_str2ld(void);
+extern int unit_test_buffer(void);
 
 #endif /* NETDATA_UNIT_TEST_H */
diff --git a/src/web_api_v1.c b/src/web_api_v1.c
index 3ffd8c32..9514f8db 100644
--- a/src/web_api_v1.c
+++ b/src/web_api_v1.c
@@ -816,7 +816,7 @@ inline int web_client_api_request_v1_registry(RRDHOST *host, struct web_client *
 #endif /* NETDATA_INTERNAL_CHECKS */
     }
 
-    if(respect_web_browser_do_not_track_policy && w->donottrack) {
+    if(respect_web_browser_do_not_track_policy && web_client_has_donottrack(w)) {
         buffer_flush(w->response.data);
         buffer_sprintf(w->response.data, "Your web browser is sending 'DNT: 1' (Do Not Track). The registry requires persistent cookies on your browser to work.");
         return 400;
@@ -853,19 +853,19 @@ inline int web_client_api_request_v1_registry(RRDHOST *host, struct web_client *
 
     switch(action) {
         case 'A':
-            w->tracking_required = 1;
+            web_client_enable_tracking_required(w);
             return registry_request_access_json(host, w, person_guid, machine_guid, machine_url, url_name, now_realtime_sec());
 
         case 'D':
-            w->tracking_required = 1;
+            web_client_enable_tracking_required(w);
             return registry_request_delete_json(host, w, person_guid, machine_guid, machine_url, delete_url, now_realtime_sec());
 
         case 'S':
-            w->tracking_required = 1;
+            web_client_enable_tracking_required(w);
             return registry_request_search_json(host, w, person_guid, machine_guid, machine_url, search_machine_guid, now_realtime_sec());
 
         case 'W':
-            w->tracking_required = 1;
+            web_client_enable_tracking_required(w);
             return registry_request_switch_json(host, w, person_guid, machine_guid, machine_url, to_person_guid, now_realtime_sec());
 
         case 'H':
diff --git a/src/web_buffer.c b/src/web_buffer.c
index 9f9ceda6..f5452452 100644
--- a/src/web_buffer.c
+++ b/src/web_buffer.c
@@ -84,6 +84,19 @@ inline char *print_number_llu_r(char *str, unsigned long long uvalue) {
     return wstr;
 }
 
+inline char *print_number_llu_r_smart(char *str, unsigned long long uvalue) {
+#ifdef ENVIRONMENT32
+    if(uvalue > (unsigned long long)0xffffffff)
+        str = print_number_llu_r(str, uvalue);
+    else
+        str = print_number_lu_r(str, uvalue);
+#else
+    do *str++ = (char)('0' + (uvalue % 10)); while(uvalue /= 10);
+#endif
+
+    return str;
+}
+
 void buffer_print_llu(BUFFER *wb, unsigned long long uvalue)
 {
     buffer_need_bytes(wb, 50);
@@ -201,29 +214,25 @@ void buffer_sprintf(BUFFER *wb, const char *fmt, ...)
 {
     if(unlikely(!fmt || !*fmt)) return;
 
-    buffer_need_bytes(wb, 2);
-
-    size_t len = wb->size - wb->len - 1;
-    size_t wrote;
-
     va_list args;
-    va_start(args, fmt);
-    wrote = (size_t) vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
-    va_end(args);
+    size_t wrote = 0, need = 2, multiplier = 0, len;
+
+    do {
+        need += wrote + multiplier * WEB_DATA_LENGTH_INCREASE_STEP;
+        multiplier++;
 
-    if(unlikely(wrote >= len)) {
-        // truncated
-        buffer_overflow_check(wb);
+        debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %zu, size = %zu, by %zu bytes (wrote = %zu)\n", wb->len, wb->size, need, wrote);
+        buffer_need_bytes(wb, need);
 
-        debug(D_WEB_BUFFER, "web_buffer_sprintf(): increasing web_buffer at position %zu, size = %zu\n", wb->len, wb->size);
-        buffer_need_bytes(wb, len + WEB_DATA_LENGTH_INCREASE_STEP);
+        len = wb->size - wb->len - 1;
 
         va_start(args, fmt);
-        buffer_vsprintf(wb, fmt, args);
+        wrote = (size_t) vsnprintfz(&wb->buffer[wb->len], len, fmt, args);
         va_end(args);
-    }
-    else
-        wb->len += wrote;
+
+    } while(wrote >= len);
+
+    wb->len += wrote;
 
     // the buffer is \0 terminated by vsnprintf
 }
diff --git a/src/web_buffer.h b/src/web_buffer.h
index 8f0d29cd..177abc0a 100644
--- a/src/web_buffer.h
+++ b/src/web_buffer.h
@@ -71,6 +71,7 @@ extern void buffer_char_replace(BUFFER *wb, char from, char to);
 
 extern char *print_number_lu_r(char *str, unsigned long uvalue);
 extern char *print_number_llu_r(char *str, unsigned long long uvalue);
+extern char *print_number_llu_r_smart(char *str, unsigned long long uvalue);
 
 extern void buffer_print_llu(BUFFER *wb, unsigned long long uvalue);
 
diff --git a/src/web_buffer_svg.c b/src/web_buffer_svg.c
index 2591799d..287bbd6b 100644
--- a/src/web_buffer_svg.c
+++ b/src/web_buffer_svg.c
@@ -389,10 +389,13 @@ static inline char *format_value_with_precision_and_unit(char *value_string, siz
             len = snprintfz(value_string, value_string_len, "%0.0Lf", (long double) value);
             trim_zeros = 0;
         }
-        else if(isgreaterequal(abs, 10))  len = snprintfz(value_string, value_string_len, "%0.1Lf", (long double) value);
-        else if(isgreaterequal(abs, 1))   len = snprintfz(value_string, value_string_len, "%0.2Lf", (long double) value);
-        else if(isgreaterequal(abs, 0.1)) len = snprintfz(value_string, value_string_len, "%0.2Lf", (long double) value);
-        else                              len = snprintfz(value_string, value_string_len, "%0.4Lf", (long double) value);
+        else if(isgreaterequal(abs, 10))     len = snprintfz(value_string, value_string_len, "%0.1Lf", (long double) value);
+        else if(isgreaterequal(abs, 1))      len = snprintfz(value_string, value_string_len, "%0.2Lf", (long double) value);
+        else if(isgreaterequal(abs, 0.1))    len = snprintfz(value_string, value_string_len, "%0.2Lf", (long double) value);
+        else if(isgreaterequal(abs, 0.01))   len = snprintfz(value_string, value_string_len, "%0.4Lf", (long double) value);
+        else if(isgreaterequal(abs, 0.001))  len = snprintfz(value_string, value_string_len, "%0.5Lf", (long double) value);
+        else if(isgreaterequal(abs, 0.0001)) len = snprintfz(value_string, value_string_len, "%0.6Lf", (long double) value);
+        else                                 len = snprintfz(value_string, value_string_len, "%0.7Lf", (long double) value);
 
         if(unlikely(trim_zeros)) {
             int l;
diff --git a/src/web_client.c b/src/web_client.c
index 7da08070..6ec3e11e 100644
--- a/src/web_client.c
+++ b/src/web_client.c
@@ -17,10 +17,11 @@ unsigned long long web_clients_count = 0;
 
 static inline int web_client_crock_socket(struct web_client *w) {
 #ifdef TCP_CORK
-    if(likely(!w->tcp_cork && w->ofd != -1)) {
+    if(likely(web_client_is_corkable(w) && !w->tcp_cork && w->ofd != -1)) {
         w->tcp_cork = 1;
         if(unlikely(setsockopt(w->ofd, IPPROTO_TCP, TCP_CORK, (char *) &w->tcp_cork, sizeof(int)) != 0)) {
             error("%llu: failed to enable TCP_CORK on socket.", w->id);
+
             w->tcp_cork = 0;
             return -1;
         }
@@ -78,7 +79,7 @@ struct web_client *web_client_create(int listener) {
     w->response.header = buffer_create(HTTP_RESPONSE_HEADER_SIZE);
     w->response.header_output = buffer_create(HTTP_RESPONSE_HEADER_SIZE);
     w->origin[0] = '*';
-    w->wait_receive = 1;
+    web_client_enable_wait_receive(w);
 
     if(web_clients) web_clients->prev = w;
     w->next = web_clients;
@@ -150,9 +151,9 @@ void web_client_reset(struct web_client *w) {
     w->mode = WEB_CLIENT_MODE_NORMAL;
 
     w->tcp_cork = 0;
-    w->donottrack = 0;
-    w->tracking_required = 0;
-    w->keepalive = 0;
+    web_client_disable_donottrack(w);
+    web_client_disable_tracking_required(w);
+    web_client_disable_keepalive(w);
     w->decoded_url[0] = '\0';
 
     buffer_reset(w->response.header_output);
@@ -162,8 +163,8 @@ void web_client_reset(struct web_client *w) {
     w->response.sent = 0;
     w->response.code = 0;
 
-    w->wait_receive = 1;
-    w->wait_send = 0;
+    web_client_enable_wait_receive(w);
+    web_client_disable_wait_send(w);
 
     w->response.zoutput = 0;
 
@@ -210,14 +211,18 @@ uid_t web_files_uid(void) {
     static uid_t owner_uid = 0;
 
     if(unlikely(!web_owner)) {
-        web_owner = config_get(CONFIG_SECTION_WEB, "web files owner", config_get(CONFIG_SECTION_GLOBAL, "run as user", ""));
+        // getpwuid() is not thread safe,
+        // but we have called this function once
+        // while single threaded
+        struct passwd *pw = getpwuid(geteuid());
+        web_owner = config_get(CONFIG_SECTION_WEB, "web files owner", (pw)?(pw->pw_name?pw->pw_name:""):"");
         if(!web_owner || !*web_owner)
             owner_uid = geteuid();
         else {
             // getpwnam() is not thread safe,
             // but we have called this function once
             // while single threaded
-            struct passwd *pw = getpwnam(web_owner);
+            pw = getpwnam(web_owner);
             if(!pw) {
                 error("User '%s' is not present. Ignoring option.", web_owner);
                 owner_uid = geteuid();
@@ -237,14 +242,18 @@ gid_t web_files_gid(void) {
     static gid_t owner_gid = 0;
 
     if(unlikely(!web_group)) {
-        web_group = config_get(CONFIG_SECTION_WEB, "web files group", config_get(CONFIG_SECTION_WEB, "web files owner", ""));
+        // getgrgid() is not thread safe,
+        // but we have called this function once
+        // while single threaded
+        struct group *gr = getgrgid(getegid());
+        web_group = config_get(CONFIG_SECTION_WEB, "web files group", (gr)?(gr->gr_name?gr->gr_name:""):"");
         if(!web_group || !*web_group)
             owner_gid = getegid();
         else {
             // getgrnam() is not thread safe,
             // but we have called this function once
             // while single threaded
-            struct group *gr = getgrnam(web_group);
+            gr = getgrnam(web_group);
             if(!gr) {
                 error("Group '%s' is not present. Ignoring option.", web_group);
                 owner_gid = getegid();
@@ -383,8 +392,8 @@ int mysendfile(struct web_client *w, char *filename) {
     debug(D_WEB_CLIENT_ACCESS, "%llu: Sending file '%s' (%ld bytes, ifd %d, ofd %d).", w->id, webfilename, stat.st_size, w->ifd, w->ofd);
 
     w->mode = WEB_CLIENT_MODE_FILECOPY;
-    w->wait_receive = 1;
-    w->wait_send = 0;
+    web_client_enable_wait_receive(w);
+    web_client_disable_wait_send(w);
     buffer_flush(w->response.data);
     w->response.rlen = stat.st_size;
 #ifdef __APPLE__
@@ -723,11 +732,11 @@ static inline char *http_header_parse(struct web_client *w, char *s) {
 
     else if(hash == hash_connection && !strcasecmp(s, "Connection")) {
         if(strcasestr(v, "keep-alive"))
-            w->keepalive = 1;
+            web_client_enable_keepalive(w);
     }
     else if(respect_web_browser_do_not_track_policy && hash == hash_donottrack && !strcasecmp(s, "DNT")) {
-        if(*v == '0') w->donottrack = 0;
-        else if(*v == '1') w->donottrack = 1;
+        if(*v == '0') web_client_disable_donottrack(w);
+        else if(*v == '1') web_client_enable_donottrack(w);
     }
 #ifdef NETDATA_WITH_ZLIB
     else if(hash == hash_accept_encoding && !strcasecmp(s, "Accept-Encoding")) {
@@ -776,7 +785,7 @@ static inline HTTP_VALIDATION http_request_validate(struct web_client *w) {
         w->mode = WEB_CLIENT_MODE_STREAM;
     }
     else {
-        w->wait_receive = 0;
+        web_client_disable_wait_receive(w);
         return HTTP_VALIDATION_NOT_SUPPORTED;
     }
 
@@ -792,7 +801,7 @@ static inline HTTP_VALIDATION http_request_validate(struct web_client *w) {
 
     // incomplete requests
     if(unlikely(!*s)) {
-        w->wait_receive = 1;
+        web_client_enable_wait_receive(w);
         return HTTP_VALIDATION_INCOMPLETE;
     }
 
@@ -823,7 +832,7 @@ static inline HTTP_VALIDATION http_request_validate(struct web_client *w) {
                 // FIXME -- we should avoid it
                 strncpyz(w->last_url, w->decoded_url, URL_MAX);
 
-                w->wait_receive = 0;
+                web_client_disable_wait_receive(w);
                 return HTTP_VALIDATION_OK;
             }
 
@@ -833,7 +842,7 @@ static inline HTTP_VALIDATION http_request_validate(struct web_client *w) {
     }
 
     // incomplete request
-    w->wait_receive = 1;
+    web_client_enable_wait_receive(w);
     return HTTP_VALIDATION_INCOMPLETE;
 }
 
@@ -876,7 +885,7 @@ static inline void web_client_send_http_header(struct web_client *w) {
                     "Content-Type: %s\r\n"
                     "Date: %s\r\n"
                    , w->response.code, code_msg
-                   , w->keepalive?"keep-alive":"close"
+                   , web_client_has_keepalive(w)?"keep-alive":"close"
                    , w->origin
                    , content_type_string
                    , date
@@ -904,7 +913,7 @@ static inline void web_client_send_http_header(struct web_client *w) {
     }
     else {
         if(respect_web_browser_do_not_track_policy) {
-            if(w->tracking_required)
+            if(web_client_has_tracking_required(w))
                 buffer_sprintf(w->response.header_output,
                         "Tk: T;cookies\r\n");
             else
@@ -946,7 +955,7 @@ static inline void web_client_send_http_header(struct web_client *w) {
         }
         else {
             // we don't know the content length, disable keep-alive
-            w->keepalive = 0;
+            web_client_disable_keepalive(w);
         }
     }
 
@@ -1234,8 +1243,8 @@ void web_client_process_request(struct web_client *w) {
     web_client_send_http_header(w);
 
     // enable sending immediately if we have data
-    if(w->response.data->len) w->wait_send = 1;
-    else w->wait_send = 0;
+    if(w->response.data->len) web_client_enable_wait_send(w);
+    else web_client_disable_wait_send(w);
 
     switch(w->mode) {
         case WEB_CLIENT_MODE_STREAM:
@@ -1253,7 +1262,7 @@ void web_client_process_request(struct web_client *w) {
         case WEB_CLIENT_MODE_FILECOPY:
             if(w->response.rlen) {
                 debug(D_WEB_CLIENT, "%llu: Done preparing the response. Will be sending data file of %zu bytes to client.", w->id, w->response.rlen);
-                w->wait_receive = 1;
+                web_client_enable_wait_receive(w);
 
                 /*
                 // utilize the kernel sendfile() for copying the file to the socket.
@@ -1368,14 +1377,14 @@ ssize_t web_client_send_deflate(struct web_client *w)
             if(t < 0) return t;
         }
 
-        if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->response.rlen && w->response.rlen > w->response.data->len) {
+        if(w->mode == WEB_CLIENT_MODE_FILECOPY && web_client_has_wait_receive(w) && w->response.rlen && w->response.rlen > w->response.data->len) {
             // we have to wait, more data will come
             debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
-            w->wait_send = 0;
+            web_client_disable_wait_send(w);
             return t;
         }
 
-        if(unlikely(!w->keepalive)) {
+        if(unlikely(!web_client_has_keepalive(w))) {
             debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %zu bytes sent.", w->id, w->response.sent);
             WEB_CLIENT_IS_DEAD(w);
             return t;
@@ -1411,7 +1420,7 @@ ssize_t web_client_send_deflate(struct web_client *w)
         // ask for FINISH if we have all the input
         int flush = Z_SYNC_FLUSH;
         if(w->mode == WEB_CLIENT_MODE_NORMAL
-            || (w->mode == WEB_CLIENT_MODE_FILECOPY && !w->wait_receive && w->response.data->len == w->response.rlen)) {
+            || (w->mode == WEB_CLIENT_MODE_FILECOPY && !web_client_has_wait_receive(w) && w->response.data->len == w->response.rlen)) {
             flush = Z_FINISH;
             debug(D_DEFLATE, "%llu: Requesting Z_FINISH, if possible.", w->id);
         }
@@ -1480,14 +1489,14 @@ ssize_t web_client_send(struct web_client *w) {
         // A. we have done everything
         // B. we temporarily have nothing to send, waiting for the buffer to be filled by ifd
 
-        if(w->mode == WEB_CLIENT_MODE_FILECOPY && w->wait_receive && w->response.rlen && w->response.rlen > w->response.data->len) {
+        if(w->mode == WEB_CLIENT_MODE_FILECOPY && web_client_has_wait_receive(w) && w->response.rlen && w->response.rlen > w->response.data->len) {
             // we have to wait, more data will come
             debug(D_WEB_CLIENT, "%llu: Waiting for more data to become available.", w->id);
-            w->wait_send = 0;
+            web_client_disable_wait_send(w);
             return 0;
         }
 
-        if(unlikely(!w->keepalive)) {
+        if(unlikely(!web_client_has_keepalive(w))) {
             debug(D_WEB_CLIENT, "%llu: Closing (keep-alive is not enabled). %zu bytes sent.", w->id, w->response.sent);
             WEB_CLIENT_IS_DEAD(w);
             return 0;
@@ -1541,10 +1550,10 @@ ssize_t web_client_receive(struct web_client *w)
         debug(D_WEB_DATA, "%llu: Received data: '%s'.", w->id, &w->response.data->buffer[old]);
 
         if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
-            w->wait_send = 1;
+            web_client_enable_wait_send(w);
 
             if(w->response.rlen && w->response.data->len >= w->response.rlen)
-                w->wait_receive = 0;
+                web_client_disable_wait_receive(w);
         }
     }
     else if(likely(bytes == 0)) {
@@ -1557,7 +1566,7 @@ ssize_t web_client_receive(struct web_client *w)
         if(w->mode == WEB_CLIENT_MODE_FILECOPY) {
             // we are copying data from ifd to ofd
             // let it finish copying...
-            w->wait_receive = 0;
+            web_client_disable_wait_receive(w);
 
             debug(D_WEB_CLIENT, "%llu: Read the whole file.", w->id);
             if(w->ifd != w->ofd) close(w->ifd);
@@ -1603,11 +1612,11 @@ void *web_client_main(void *ptr)
     for(;;) {
         if(unlikely(netdata_exit)) break;
 
-        if(unlikely(w->dead)) {
+        if(unlikely(web_client_check_dead(w))) {
             debug(D_WEB_CLIENT, "%llu: client is dead.", w->id);
             break;
         }
-        else if(unlikely(!w->wait_receive && !w->wait_send)) {
+        else if(unlikely(!web_client_has_wait_receive(w) && !web_client_has_wait_send(w))) {
             debug(D_WEB_CLIENT, "%llu: client is not set for neither receiving nor sending data.", w->id);
             break;
         }
@@ -1622,8 +1631,8 @@ void *web_client_main(void *ptr)
             fds[0].events = 0;
             fds[0].revents = 0;
 
-            if(w->wait_receive) fds[0].events |= POLLIN;
-            if(w->wait_send)    fds[0].events |= POLLOUT;
+            if(web_client_has_wait_receive(w)) fds[0].events |= POLLIN;
+            if(web_client_has_wait_send(w))    fds[0].events |= POLLOUT;
 
             fds[1].fd = -1;
             fds[1].events = 0;
@@ -1637,19 +1646,19 @@ void *web_client_main(void *ptr)
             fds[0].fd = w->ifd;
             fds[0].events = 0;
             fds[0].revents = 0;
-            if(w->wait_receive) fds[0].events |= POLLIN;
+            if(web_client_has_wait_receive(w)) fds[0].events |= POLLIN;
             ifd = &fds[0];
 
             fds[1].fd = w->ofd;
             fds[1].events = 0;
             fds[1].revents = 0;
-            if(w->wait_send)    fds[1].events |= POLLOUT;
+            if(web_client_has_wait_send(w))    fds[1].events |= POLLOUT;
             ofd = &fds[1];
 
             fdmax = 2;
         }
 
-        debug(D_WEB_CLIENT, "%llu: Waiting socket async I/O for %s %s", w->id, w->wait_receive?"INPUT":"", w->wait_send?"OUTPUT":"");
+        debug(D_WEB_CLIENT, "%llu: Waiting socket async I/O for %s %s", w->id, web_client_has_wait_receive(w)?"INPUT":"", web_client_has_wait_send(w)?"OUTPUT":"");
         errno = 0;
         timeout = web_client_timeout * 1000;
         retval = poll(fds, fdmax, timeout);
@@ -1666,14 +1675,14 @@ void *web_client_main(void *ptr)
             break;
         }
         else if(unlikely(!retval)) {
-            debug(D_WEB_CLIENT, "%llu: Timeout while waiting socket async I/O for %s %s", w->id, w->wait_receive?"INPUT":"", w->wait_send?"OUTPUT":"");
+            debug(D_WEB_CLIENT, "%llu: Timeout while waiting socket async I/O for %s %s", w->id, web_client_has_wait_receive(w)?"INPUT":"", web_client_has_wait_send(w)?"OUTPUT":"");
             break;
         }
 
         if(unlikely(netdata_exit)) break;
 
         int used = 0;
-        if(w->wait_send && ofd->revents & POLLOUT) {
+        if(web_client_has_wait_send(w) && ofd->revents & POLLOUT) {
             used++;
             if(web_client_send(w) < 0) {
                 debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
@@ -1683,7 +1692,7 @@ void *web_client_main(void *ptr)
 
         if(unlikely(netdata_exit)) break;
 
-        if(w->wait_receive && (ifd->revents & POLLIN || ifd->revents & POLLPRI)) {
+        if(web_client_has_wait_receive(w) && (ifd->revents & POLLIN || ifd->revents & POLLPRI)) {
             used++;
             if(web_client_receive(w) < 0) {
                 debug(D_WEB_CLIENT, "%llu: Cannot receive data from client. Closing client.", w->id);
@@ -1724,7 +1733,7 @@ void *web_client_main(void *ptr)
     w->ifd = -1;
     w->ofd = -1;
 
-    w->obsolete = 1;
+    WEB_CLIENT_IS_OBSOLETE(w);
 
     pthread_exit(NULL);
     return NULL;
diff --git a/src/web_client.h b/src/web_client.h
index 617917df..126a494f 100644
--- a/src/web_client.h
+++ b/src/web_client.h
@@ -20,6 +20,66 @@ typedef enum web_client_mode {
     WEB_CLIENT_MODE_STREAM      = 3
 } WEB_CLIENT_MODE;
 
+typedef enum web_client_flags {
+    WEB_CLIENT_FLAG_OBSOLETE          = 1 << 0, // if set, the listener will remove this client
+    // after setting this, you should not touch
+    // this web_client
+
+    WEB_CLIENT_FLAG_DEAD              = 1 << 1, // if set, this client is dead
+
+    WEB_CLIENT_FLAG_KEEPALIVE         = 1 << 2, // if set, the web client will be re-used
+
+    WEB_CLIENT_FLAG_WAIT_RECEIVE      = 1 << 3, // if set, we are waiting more input data
+    WEB_CLIENT_FLAG_WAIT_SEND         = 1 << 4, // if set, we have data to send to the client
+
+    WEB_CLIENT_FLAG_DO_NOT_TRACK      = 1 << 5, // if set, we should not set cookies on this client
+    WEB_CLIENT_FLAG_TRACKING_REQUIRED = 1 << 6, // if set, we need to send cookies
+
+    WEB_CLIENT_FLAG_TCP_CLIENT        = 1 << 7, // if set, the client is using a TCP socket
+    WEB_CLIENT_FLAG_UNIX_CLIENT       = 1 << 8  // if set, the client is using a UNIX socket
+} WEB_CLIENT_FLAGS;
+
+//#ifdef HAVE_C___ATOMIC
+//#define web_client_flag_check(w, flag) (__atomic_load_n(&((w)->flags), __ATOMIC_SEQ_CST) & flag)
+//#define web_client_flag_set(w, flag)   __atomic_or_fetch(&((w)->flags), flag, __ATOMIC_SEQ_CST)
+//#define web_client_flag_clear(w, flag) __atomic_and_fetch(&((w)->flags), ~flag, __ATOMIC_SEQ_CST)
+//#else
+#define web_client_flag_check(w, flag) ((w)->flags & flag)
+#define web_client_flag_set(w, flag)   (w)->flags |= flag
+#define web_client_flag_clear(w, flag) (w)->flags &= ~flag
+//#endif
+
+#define WEB_CLIENT_IS_OBSOLETE(w) web_client_flag_set(w, WEB_CLIENT_FLAG_OBSOLETE)
+#define web_client_check_obsolete(w) web_client_flag_check(w, WEB_CLIENT_FLAG_OBSOLETE)
+
+#define WEB_CLIENT_IS_DEAD(w) web_client_flag_set(w, WEB_CLIENT_FLAG_DEAD)
+#define web_client_check_dead(w) web_client_flag_check(w, WEB_CLIENT_FLAG_DEAD)
+
+#define web_client_has_keepalive(w) web_client_flag_check(w, WEB_CLIENT_FLAG_KEEPALIVE)
+#define web_client_enable_keepalive(w) web_client_flag_set(w, WEB_CLIENT_FLAG_KEEPALIVE)
+#define web_client_disable_keepalive(w) web_client_flag_clear(w, WEB_CLIENT_FLAG_KEEPALIVE)
+
+#define web_client_has_donottrack(w) web_client_flag_check(w, WEB_CLIENT_FLAG_DO_NOT_TRACK)
+#define web_client_enable_donottrack(w) web_client_flag_set(w, WEB_CLIENT_FLAG_DO_NOT_TRACK)
+#define web_client_disable_donottrack(w) web_client_flag_clear(w, WEB_CLIENT_FLAG_DO_NOT_TRACK)
+
+#define web_client_has_tracking_required(w) web_client_flag_check(w, WEB_CLIENT_FLAG_TRACKING_REQUIRED)
+#define web_client_enable_tracking_required(w) web_client_flag_set(w, WEB_CLIENT_FLAG_TRACKING_REQUIRED)
+#define web_client_disable_tracking_required(w) web_client_flag_clear(w, WEB_CLIENT_FLAG_TRACKING_REQUIRED)
+
+#define web_client_has_wait_receive(w) web_client_flag_check(w, WEB_CLIENT_FLAG_WAIT_RECEIVE)
+#define web_client_enable_wait_receive(w) web_client_flag_set(w, WEB_CLIENT_FLAG_WAIT_RECEIVE)
+#define web_client_disable_wait_receive(w) web_client_flag_clear(w, WEB_CLIENT_FLAG_WAIT_RECEIVE)
+
+#define web_client_has_wait_send(w) web_client_flag_check(w, WEB_CLIENT_FLAG_WAIT_SEND)
+#define web_client_enable_wait_send(w) web_client_flag_set(w, WEB_CLIENT_FLAG_WAIT_SEND)
+#define web_client_disable_wait_send(w) web_client_flag_clear(w, WEB_CLIENT_FLAG_WAIT_SEND)
+
+#define web_client_set_tcp(w) web_client_flag_set(w, WEB_CLIENT_FLAG_TCP_CLIENT)
+#define web_client_set_unix(w) web_client_flag_set(w, WEB_CLIENT_FLAG_UNIX_CLIENT)
+
+#define web_client_is_corkable(w) web_client_flag_check(w, WEB_CLIENT_FLAG_TCP_CLIENT)
+
 #define URL_MAX 8192
 #define ZLIB_CHUNK  16384
 #define HTTP_RESPONSE_HEADER_SIZE 4096
@@ -50,20 +110,7 @@ struct response {
 struct web_client {
     unsigned long long id;
 
-    uint8_t obsolete:1;                 // if set to 1, the listener will remove this client
-                                        // after setting this to 1, you should not touch
-                                        // this web_client
-
-    uint8_t dead:1;                     // if set to 1, this client is dead
-
-    uint8_t keepalive:1;                // if set to 1, the web client will be re-used
-
-    uint8_t wait_receive:1;             // 1 = we are waiting more input data
-    uint8_t wait_send:1;                // 1 = we have data to send to the client
-
-    uint8_t donottrack:1;               // 1 = we should not set cookies on this client
-    uint8_t tracking_required:1;        // 1 = if the request requires cookies
-
+    WEB_CLIENT_FLAGS flags;             // status flags for the client
     WEB_CLIENT_MODE mode;               // the operational mode of the client
 
     int tcp_cork;                       // 1 = we have a cork on the socket
@@ -94,8 +141,6 @@ struct web_client {
     struct web_client *next;
 };
 
-#define WEB_CLIENT_IS_DEAD(w) (w)->dead=1
-
 extern struct web_client *web_clients;
 
 extern uid_t web_files_uid(void);
diff --git a/src/web_server.c b/src/web_server.c
index 491cd11a..72168d15 100644
--- a/src/web_server.c
+++ b/src/web_server.c
@@ -89,7 +89,7 @@ static inline void cleanup_web_clients(void) {
     struct web_client *w;
 
     for (w = web_clients; w;) {
-        if (w->obsolete) {
+        if (web_client_check_obsolete(w)) {
             debug(D_WEB_CLIENT, "%llu: Removing client.", w->id);
             // pthread_cancel(w->thread);
             // pthread_join(w->thread, NULL);
@@ -170,11 +170,11 @@ void *socket_listen_main_multi_threaded(void *ptr) {
 
                 if(pthread_create(&w->thread, NULL, web_client_main, w) != 0) {
                     error("%llu: failed to create new thread for web client.", w->id);
-                    w->obsolete = 1;
+                    WEB_CLIENT_IS_OBSOLETE(w);
                 }
                 else if(pthread_detach(w->thread) != 0) {
                     error("%llu: Cannot request detach of newly created web client thread.", w->id);
-                    w->obsolete = 1;
+                    WEB_CLIENT_IS_OBSOLETE(w);
                 }
             }
         }
@@ -200,7 +200,7 @@ void *socket_listen_main_multi_threaded(void *ptr) {
 struct web_client *single_threaded_clients[FD_SETSIZE];
 
 static inline int single_threaded_link_client(struct web_client *w, fd_set *ifds, fd_set *ofds, fd_set *efds, int *max) {
-    if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send)))
+    if(unlikely(web_client_check_obsolete(w) || web_client_check_dead(w) || (!web_client_has_wait_receive(w) && !web_client_has_wait_send(w))))
         return 1;
 
     if(unlikely(w->ifd < 0 || w->ifd >= FD_SETSIZE || w->ofd < 0 || w->ofd >= FD_SETSIZE)) {
@@ -216,8 +216,8 @@ static inline int single_threaded_link_client(struct web_client *w, fd_set *ifds
         FD_SET(w->ofd, efds);
     }
 
-    if(w->wait_receive) FD_SET(w->ifd, ifds);
-    if(w->wait_send)    FD_SET(w->ofd, ofds);
+    if(web_client_has_wait_receive(w)) FD_SET(w->ifd, ifds);
+    if(web_client_has_wait_send(w))    FD_SET(w->ofd, ofds);
 
     single_threaded_clients[w->ifd] = w;
     single_threaded_clients[w->ofd] = w;
@@ -229,13 +229,13 @@ static inline int single_threaded_unlink_client(struct web_client *w, fd_set *if
     FD_CLR(w->ifd, efds);
     if(unlikely(w->ifd != w->ofd)) FD_CLR(w->ofd, efds);
 
-    if(w->wait_receive) FD_CLR(w->ifd, ifds);
-    if(w->wait_send)    FD_CLR(w->ofd, ofds);
+    if(web_client_has_wait_receive(w)) FD_CLR(w->ifd, ifds);
+    if(web_client_has_wait_send(w))    FD_CLR(w->ofd, ofds);
 
     single_threaded_clients[w->ifd] = NULL;
     single_threaded_clients[w->ofd] = NULL;
 
-    if(unlikely(w->obsolete || w->dead || (!w->wait_receive && !w->wait_send)))
+    if(unlikely(web_client_check_obsolete(w) || web_client_check_dead(w) || (!web_client_has_wait_receive(w) && !web_client_has_wait_send(w))))
         return 1;
 
     return 0;
@@ -302,6 +302,12 @@ void *socket_listen_main_single_threaded(void *ptr) {
                 if (FD_ISSET(api_sockets.fds[i], &rifds)) {
                     debug(D_WEB_CLIENT_ACCESS, "LISTENER: new connection.");
                     w = web_client_create(api_sockets.fds[i]);
+
+                    if(api_sockets.fds_families[i] == AF_UNIX)
+                        web_client_set_unix(w);
+                    else
+                        web_client_set_tcp(w);
+
                     if (single_threaded_link_client(w, &ifds, &ofds, &ifds, &fdmax) != 0) {
                         web_client_free(w);
                     }
@@ -326,7 +332,7 @@ void *socket_listen_main_single_threaded(void *ptr) {
                     continue;
                 }
 
-                if (unlikely(w->wait_receive && FD_ISSET(w->ifd, &rifds))) {
+                if (unlikely(web_client_has_wait_receive(w) && FD_ISSET(w->ifd, &rifds))) {
                     if (unlikely(web_client_receive(w) < 0)) {
                         web_client_free(w);
                         continue;
@@ -338,7 +344,7 @@ void *socket_listen_main_single_threaded(void *ptr) {
                     }
                 }
 
-                if (unlikely(w->wait_send && FD_ISSET(w->ofd, &rofds))) {
+                if (unlikely(web_client_has_wait_send(w) && FD_ISSET(w->ofd, &rofds))) {
                     if (unlikely(web_client_send(w) < 0)) {
                         debug(D_WEB_CLIENT, "%llu: Cannot send data to client. Closing client.", w->id);
                         web_client_free(w);