#!/bin/sh
#
# Plugin to monitor swap IO in number of blocks per second.
#
# Parameters:
#
# 	config   (required)
# 	autoconf (optional - used by munin-config)
#
# Magic markers (used by munin-config and some installation scripts (i.e.
# optional)):
#%# family=auto
#%# capabilities=autoconf



if [ "$1" = "autoconf" ]; then
	if [ -r /proc/stat ]; then
		echo yes
		exit 0
	else
		echo no
		exit 1
	fi
fi

if [ "$1" = "config" ]; then

	echo 'graph_title Swap in/out'
	echo 'graph_args -l 0 --base 1000'
	echo 'graph_vlabel pages per ${graph_period} in (-) / out (+)'
	echo 'graph_category system'
	echo 'swap_in.label swap'
	echo 'swap_in.type DERIVE'
	echo 'swap_in.max 100000'
	echo 'swap_in.min 0'
	echo 'swap_in.graph no'
	echo 'swap_out.label swap'
	echo 'swap_out.type DERIVE'
	echo 'swap_out.max 100000'
	echo 'swap_out.min 0'
	echo 'swap_out.negative swap_in'
	exit 0
fi

if [ -f /proc/vmstat ]; then
	awk '/pswpin/ { print "swap_in.value " $2 } /pswpout/ { print "swap_out.value " $2 }' < /proc/vmstat 
else
	awk '/swap/ { print "swap_in.value " $2 "\nswap_out.value " $3 }' < /proc/stat 
fi
