#!/bin/bash
#
# Munin plugin for monitoring Nginx working set
#
# ---

if [ "$1" == config ]; then
    cat <<'EOF'
graph_title NGINX Working Set
graph_vlabel WS Bytes
graph_category nginx
graph_args --base 1024
ws.label Working Set
EOF
    exit 0
fi

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