script for terminate dead process

[peterchu]

In my system , there are a system user "cronusr" , it is mainly to run the crontab job in the database .Sometimes the cronjob process will be failure ( due to some reason ) so that many cronusr process are in the system , it affect other process in the system ,

I am looking for to have a script that can kill the process - the process owner is cronusr and it is idle for one hour ( I think it can check by ps -aux |grep pid , if the status is R , then it is running , if it is S , then it is sleep and the process can be termiated ) , could suggest the script for the case ? thx in advance.

[Alex Lavrov. · Accepted solution]

Try to get all the proccesses that you wish to reminate with "ps" program.

Probably you'll need to set UNIX95=1 env variable, to enable XPG4 with more options.

Then parse the output of ps with grep/awk etc, get PID and kill that proccess.

If you'll post here the sample of ps output that you are interested to parse, I can suggest a few things, because from the info you supplied I doubt that I can give you proper "ps" line, so it won't kill some important things ;)

[Muthukumar_5]

You can kill process as like as,

for pid in `ps -el -u cronuser | awk '{ if ( $2 == "S") { print $4 }}'`
do
kill -9 $pid
done

hth.

[Simon Hargrave]

The S state is not useful for this because a running process is constantly switching between R and S when making system calls.

It is easier to find process "elapsed" time rather than idle time, so for example if you know your process should never take more than 2 hours you could use: -

UNIX95= ps -o pid,etime -u cronusr

This will show you the PID and elapsed time for every process of cronusr. From this you can determine which ones have run >2 hours and kill as necessary.

[harry d brown jr]

Wouldn't it be easier to fix the problem rather than create another process to monitor the one that has issues with it?

It's like nuking the planet to save the whales - over kill.

live free or die
harry d brown jr