Munin contributed plugins

#!/bin/sh

# tcp_retries revision 2 (Feb 2012)

#

# TCP retransmission rate. Useful for network debugging.

#

# Required privileges: none

#

# OS: Linux with procfs

#

# Author: Artem Sheremet <dot.doom@gmail.com>

#

#%# family=auto

#%# capabilities=autoconf

TCPSTAT=/proc/net/tcp

case $1 in

	autoconf)

		[ -r $TCPSTAT -o -r ${TCPSTAT}6 ] && echo "yes" || echo "no"

		;;

    config)

		cat <<CONFIG

graph_title TCP retransmissions

graph_vlabel Rate, retrs/sockets

graph_category network

graph_info TCP sockets retransmission counters from $TCPSTAT

rate.label Retransmission rate

rate.draw LINE2

rate.min 0

CONFIG

		;;

esac

cat /proc/net/tcp* | awk '

{

	TOTAL += $7;

	COUNT++;

}

END {

	printf "rate.value %.3f\n", TOTAL/COUNT

}

'