openwrt-munin-node/plugins.d/memory

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#!/bin/sh
# this plugin was rewritten to avoid licensing conflicts.
maxswap=`/usr/bin/free|/bin/grep '^Swap:'|/usr/bin/awk '{print $2}'`
maxmem=`/usr/bin/free|/bin/grep '^Mem:'|/usr/bin/awk '{print $2}'`
swap=0; [ $maxswap -ne 0 ] && swap=1
if [ "$1" == "config" ];then
[ $maxswap -gt 0 ] && maxswap="-$maxswap"
echo "graph_title Memory usage
graph_args --base 1024 -u $maxmem -l $maxswap
graph_category system
used.label in-use memory
used.draw STACK
cache.label caches
cache.draw STACK
buff.label buffers
buff.draw STACK
shared.label shared memory
shared.draw STACK
free.label available memory
free.draw STACK"
[ $swap -eq 1 ] && echo "usedswap.label in-use swap
usedswap.draw STACK
usedswap.max 0
cacheswap.label in-swap caches
cacheswap.draw STACK
cacheswap.max 0
freeswap.label available swap
freeswap.draw STACK
freeswap.max 0"
exit 0
fi
echo "used.value `/usr/bin/free|/bin/grep '^Mem:'|/usr/bin/awk '{print $3'}`
cache.value `/bin/grep '^Cached:' /proc/meminfo|/usr/bin/awk '{print $2}'`
buff.value `/usr/bin/free|/bin/grep '^Mem:'|/usr/bin/awk '{print $6}'`
shared.value `/usr/bin/free|/bin/grep '^Mem:'|/usr/bin/awk '{print $5}'`
free.value `/usr/bin/free|/bin/grep '^Mem:'|/usr/bin/awk '{print $4}'`"
[ $swap -eq 1 ] && echo "usedswap.value `/usr/bin/free|/bin/grep '^Swap:'|/usr/bin/awk '{print $3}'`
cacheswap.value `/bin/grep '^SwapCached:' /proc/meminfo|/usr/bin/awk '{print $2}'`
freeswap.value `/usr/bin/free|/bin/grep '^Swap:'|/usr/bin/awk '{print $4}'`"