Usage ./graph.sh
It requires having gnuplot installed
#!/bin/env bash | |
# https://stackoverflow.com/questions/7998302/graphing-a-processs-memory-usage | |
# trap ctrl-c and call ctrl_c() | |
trap ctrl_c INT | |
LOG=$(mktemp) | |
SCRIPT=$(mktemp) | |
IMAGE=$(mktemp) | |
echo "Output to LOG=$LOG and SCRIPT=$SCRIPT and IMAGE=$IMAGE" | |
cat >$SCRIPT <<EOL | |
set term png small size 800,600 | |
set output "$IMAGE" | |
set ylabel "RSS" | |
set y2label "VSZ" | |
set ytics nomirror | |
set y2tics nomirror in | |
set yrange [0:*] | |
set y2range [0:*] | |
plot "$LOG" using 3 with lines axes x1y1 title "RSS", "$LOG" using 2 with lines axes x1y2 title "VSZ" | |
EOL | |
function ctrl_c() { | |
gnuplot $SCRIPT | |
xdg-open $IMAGE | |
exit 0; | |
} | |
while true; do | |
ps -p $1 -o pid=,vsz=,rss= | tee -a $LOG | |
sleep 1 | |
done |
Great work. I made a few changes for some things I am working on and here are the results:
I found that
ps -p
required the PID so I usedpidof
to get that. I added waiting so you can fire off the script before the executable runs and it will wait for it before beginning to log. Also added a command line argument for saving out the output file to somewhere other thanmktemp
. I removedtee
and used output redirection becausetee
output to both standard out and to the log file, just to clean things up. Also the loop ends, not onctrl-C
but when the executable finishes running so that the whole lifetime is represented in the plot. Also implemented @will3216's suggestion because-o pid=,vsz=,rss=
didn't work for me on CentOS 7 so I used the more generic syntax. Then I cleaned up the plot and used the same scale for both Real Memory and Virtual Memory and used the colors fromhtop
.