How to list oom killer score of running linux processus
2021-10-05 - a shell command that could be a one liner
Tags: linux toolbox
There seems to be a missing piece for investigating what the oom killer will do when a linux kernel will run out of memory. Since oom_scores can be adjusted, looking at memory consumption is not enough to get a clear picture.
The base of the command came from a colleague, I refined it with the sort and tail :
while read -r pid comm; do printf '%d\t%d\t%s\n' "$pid" "$(cat /proc/$pid/oom_score)" "$comm" done < <(ps -e -o pid= -o comm=)|sort -n -k2|tail
On a busy server, the output will look like :
306 2 systemd-journal 673 2 haproxy 616 6 puppet 8370 7 mcollectived 1728 8 varnishncsa 14652 9 php-fpm7.2 14668 10 php-fpm7.2 14653 13 php-fpm7.2 1415 186 cache-main 29124 313 mysqld