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Full Discussion: Kill top 5 memory uses process
Top Forums Shell Programming and Scripting Kill top 5 memory uses process Post 302947788 by bakunin on Monday 22nd of June 2015 09:29:58 AM
Old 06-22-2015
Quote:
Originally Posted by kki
i want to know is there any command or shell script for this to kill after finding top memories from server.
Of course there is, albeit i have to give the same warnings jiliagre and zaxxon already issued: don't do it, because this is not a sound procedure.

Look at the output of ps aux:

Code:
USER          PID %CPU %MEM   SZ  RSS    TTY STAT    STIME  TIME COMMAND
root       131076 12.0  0.0  448  448      - A      Jan 26 101800:17 wait
root      1048608 11.8  0.0  448  448      - A      Jan 26 99941:41 wait
root       983070 10.7  0.0  448  448      - A      Jan 26 90791:37 wait
root      1114146 10.7  0.0  448  448      - A      Jan 26 90765:00 wait
root      4587534  1.4  2.0 134488 134712      - A      Jan 26 11558:45 storstpd start
root     10158134  0.3  1.0 65976 66516      - A      Jan 26 2477:26 storapid st

You need the second column (the PID) for the kill command. Further, you need to disregard the first line because it contains headers rather than data:

Code:
ps aux | <some filter> ... |\
while read junk PID junk ; do
     echo kill -15 $PID
done

Your ps-output may differ slightly from mine (i took mine from an AIX system, not having a HP-Ux system at hand) and you might have to adjust the command slightly. There might be processes which do not respond to signal 15 (this would indicate poor programming) so you might need to change kill -15 <pid> to kill -9 <pid>. If you do so, programs will not be able to clean up after them: shared memory segments, FIFOs and the like as well as temporary files with be left over.

Test thoroughly before you remove the "echo"-statement. Even with thorough testing i suggest to never use this.

I hope this helps.

bakunin
 

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LEARN ABOUT ULTRIX

kill

kill(1) 						      General Commands Manual							   kill(1)

Name
       kill - send a signal to a process

Syntax
       kill [-sig] processid...
       kill -l

Description
       The command sends the TERM (terminate, 15) signal to the specified processes.  If a signal name or number preceded by `-' is given as first
       argument, that signal is sent instead of terminate.  For further information, see

       The terminate signal kills processes that do not catch the signal; `kill -9 ...' is a sure kill, as the KILL (9) signal cannot  be  caught.
       By convention, if process number 0 is specified, all members in the process group (that is, processes resulting from the current login) are
       signaled.  This works only if you use and not if you use To kill a process it must either belong to you or you must be superuser.

       The process number of an asynchronous process started with `&' is reported by the shell.  Process numbers can also be  found  by  using	It
       allows job specifiers ``%...''  so process ID's are not as often used as arguments.  See for details.

Options
       -l   Lists  signal  names.  The signal names are listed by `kill -l', and are as given in /usr/include/signal.h, stripped of the common SIG
	    prefix.

See Also
       csh(1), ps(1), kill(2), sigvec(2)

																	   kill(1)
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