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I need to get all process ids which have memory usage greater or lower than predifined number. For example get id where memory (rss) usage grater than 10MB and then using this id kill each process. Thanks

uftsyo
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    OK! Show what you did so far and what is not working, so we can try to help you. If it is your homework, start by trying to do it ;) – fedorqui Nov 11 '14 at 10:32
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    Hint : Try to get the list of process running – Santosh A Nov 11 '14 at 10:33
  • Use `top` or `ps auxw` or `pgrep` ; perhaps pipe its output to `awk` – Basile Starynkevitch Nov 11 '14 at 10:33
  • If this is homework, then the teacher is a true BOFH :-)) – Alfe Nov 11 '14 at 11:05
  • Also see [How to see top processes sorted by actual memory usage?](https://stackoverflow.com/q/4802481/608639) and [Check memory per processes and subprocesses](https://stackoverflow.com/q/25495619/608639), [Script to get user that has process with most memory usage?](https://stackoverflow.com/q/41177409/608639), [A way to determine a process's “real” memory usage, i.e. private dirty RSS?](https://stackoverflow.com/q/118307/608639), etc – jww Apr 29 '18 at 21:17

2 Answers2

1

This following command will help I think,

ps aux --sort -rss

Try it.

Arnab Nandy
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0

That's not a good idea. You will certainly kill processes you should not and might render your system damaged in the process. But anyway, here's what does the trick:

ps -eo rss=,pid=,user=,comm= k -rss |
  while read size pid user comm
  do
    [ "$user" = "alfe" ] || continue  # adjust user name here
    if [ "$size" -gt 10000 ]
    then
      echo "kill $pid # $size $user $comm"
    else
      break
    fi
  done

You might want to replace the echo line by a line using kill directly, but as I said, this will probably kill processes you should not kill.

The line with the continue is meant to skip all processes which are not of a specific user; I just assumed that; if you intend to run this as root, feel free to remove that line.

Alfe
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