1 files changed, 22 insertions, 0 deletions
diff --git a/src/health/health.d/tcp_mem.conf b/src/health/health.d/tcp_mem.conf
new file mode 100644
index 000000000..b9350e3cd
--- /dev/null
+++ b/src/health/health.d/tcp_mem.conf
@@ -0,0 +1,22 @@
+# 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
+      class: Utilization
+       type: System
+  component: Network
+host labels: _os=linux
+       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
+    summary: System TCP memory utilization
+       info: TCP memory utilization
+         to: silent