1 files changed, 23 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..318be20
--- /dev/null
+++ b/health/health.d/tcp_mem.conf
@@ -0,0 +1,23 @@
+#
+# 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
+       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: TCP memory utilization
+       to: sysadmin