#!/bin/bash
#
# Munin plugin for monitoring Nginx working set
#
# by Mike Koss, Feb 12, 2012 - MIT License
#
#%# family=auto
#%# capabilities=autoconf

case $1 in
config)
    cat <<'EOF'
graph_title NGINX Working Set
graph_vlabel WS Bytes
graph_category webserver
graph_args --base 1024
ws.label Working Set
EOF
    exit 0
    ;;

autoconf)
    if [ "$(pidof nginx)" == "" ]; then
        echo no
    else
        echo yes
    fi
    exit 0
    ;;
esac

KBS=$(ps -o rss --no-heading -p $(pidof nginx))
total=0
for size in $KBS
do
    total=$(($total + $size * 1024))
done
echo ws.value $total