1 files changed, 20 insertions, 0 deletions
diff --git a/health/health.d/tcp_mem.conf b/health/health.d/tcp_mem.conf
new file mode 100644
index 0000000..6927d57
--- /dev/null
+++ b/health/health.d/tcp_mem.conf
@@ -0,0 +1,20 @@
+#
+# check
+# http://blog.tsunanet.net/2011/03/out-of-socket-memory.html
+#
+# We give a warning when TCP is under memory pressure
+# and a critical when TCP is 90% of its upper memory limit
+#
+
+   alarm: tcp_memory
+      on: ipv4.sockstat_tcp_mem
+      os: linux
+   hosts: *
+    calc: ${mem} * 100 / ${tcp_mem_high}
+   units: %
+   every: 10s
+    warn: ${mem} > (($status >= $WARNING  ) ? ( ${tcp_mem_pressure} * 0.8 ) : ( ${tcp_mem_pressure}   ))
+    crit: ${mem} > (($status >= $CRITICAL ) ? ( ${tcp_mem_pressure}       ) : ( ${tcp_mem_high} * 0.9 ))
+   delay: up 0 down 5m multiplier 1.5 max 1h
+    info: the amount of TCP memory as a percentage of its max memory limit
+      to: sysadmin