i have some pretty intense jobs that run on this centos box and want to monitor the cpu usage. if the cpu usage gets to high i want to restart those services.

i know how to restart the services but i'm not sure how to add the cpu > 10 then -restart the services-

any thoughts?

thanks!

I must be tired, but I don't understand....

You have a cpu intensive job that must run.
This job is set as a service (/etc/init.d/whatever start|stop|restart).
You want to be able to restart the service if the cpu usage is too high.

First, if the cpu usage is caused by your service, what good will it do to restart it ?
Second, you say

how to add the cpu > 10 then -restart the services-

...
what is the ">10" part ?
a cpu usage greater than 10 percent, an application cpu time greater than 10 minutes, an average system load greater than 10?

Task management with action taken on a given event, is not something that exists de-facto in the linux kernel, afaik.
So, either you have a program that handle that, or you might implement it via a script that run every minutes (via the cron system).
I assume here that you will take the second way.

If you are talking about the system avg load, such a script could be easily done with:

uptime|cut -d',' -f5

which gives you the 5 minutes average system load.
Full logic would be:

#!/bin/bash
LOAD=`uptime |cut -d',' -f5`;
echo "5 minutes average load is :$LOAD"

if [[ "$( echo "${LOAD}>10" | bc )" == '1' ]]; then
    echo 'restarting service';
    /etc/init.d/whatever restart;
else 
    echo "Load of ${LOAD} is low enough";
fi;

i think that might do it. i was talking about load averages. if they go over 10 or 20 i want to stop a job and restart a few services.

i'll give that a try and see what happens.

thank you!!

i get bc command not found. thoughts?

Then install it.
If you can restart a job, then it means you have a shell access to the server.

I don't know which distribution you use, so I don't know which command to use.
It could by "yum install bc" (red-hat / fedora derivatives), or "apt-get install bc" (debian/ubuntu derivatives), or in my case "emerge bc" (gentoo).
Or one in many many others...

The point is that bash (and by extend, sh) cannot do comaprison on float numbers.
Bc is used as a calculator, to do that comparison. it receives the string "0.45<10" (for exemple) and return 0 is false, or 1 if true.

wow... that's cool! thanks!

it now stops the job and then restarts the services i want.