graph_memory.sh

#!/bin/bash
#
# Author: Ilia Choly <ilia.choly@gmail.com>
# Year: 2014
# 

if [[ -z "$1" ]]; then
  echo "usage: graph_memory.sh <pid>"
  exit 1
fi

_pid=$1
_out_file=${_pid}.log
_gnuplot_file=${_pid}.gnuplot

echo -e "

set datafile separator \",\"
set terminal dumb
set title \"Memory Usage\"
set ylabel \"Bytes\"
set xlabel \"Date\"
set xdata time
set timefmt \"%s\"
set format x \"%m/%d\"
set key left top
set grid
plot \"${_out_file}\" using 1:2 title '${_pid}'

" > $_gnuplot_file

while true; do
  _rss=$(ps ax -eo pid,rss | grep -e "^\s*$_pid" | awk '{ print $2 }')
  _ts=$(date +"%s")
  echo "$_ts, $_rss" >> $_out_file
  clear
  gnuplot $_gnuplot_file
  sleep 10
done