1 files changed, 24 insertions, 0 deletions
diff --git a/health/health.d/tcp_orphans.conf b/health/health.d/tcp_orphans.conf
new file mode 100644
index 0000000..cbd628d
--- /dev/null
+++ b/health/health.d/tcp_orphans.conf
@@ -0,0 +1,24 @@
+
+#
+# check
+# http://blog.tsunanet.net/2011/03/out-of-socket-memory.html
+#
+# The kernel may penalize orphans by 2x or even 4x
+# so we alarm warning at 25% and critical at 50%
+#
+
+    alarm: tcp_orphans
+       on: ipv4.sockstat_tcp_sockets
+    class: Errors
+     type: System
+component: Network
+       os: linux
+    hosts: *
+     calc: ${orphan} * 100 / ${tcp_max_orphans}
+    units: %
+    every: 10s
+     warn: $this > (($status >= $WARNING ) ? ( 20 ) : ( 25 ))
+     crit: $this > (($status == $CRITICAL) ? ( 25 ) : ( 50 ))
+    delay: up 0 down 5m multiplier 1.5 max 1h
+     info: orphan IPv4 TCP sockets utilization
+       to: sysadmin