chart a process

command-ps-gnuplot.script

set term png small size 800,600
set output "command-ps-graph.png"

set ylabel "%CPU"
set y2label "MEM"

set ytics nomirror
set y2tics nomirror in

set yrange [0:*]
set y2range [0:*]

plot "/tmp/command-ps.log" using 3 with lines axes x1y1 title "%CPU", \
     "/tmp/command-ps.log" using 2 with lines axes x1y2 title "MEM"

command-ps.sh

keyword=${1}

if [ "$#" -ne 1 ]; then
  echo "Usage: command-ps.sh <keyword>"
  exit 1
fi

rm -f /tmp/command-ps.log

while true; do
  ps -o command=,rss=,%cpu= | grep "$keyword" | grep -v grep >> /tmp/command-ps.log
  sleep 0.5
done

# CTRL+C to finish collecting stat