Hello All
im working on linux enterprise, the prolem is when i use ipcs to see the no of processes, i find root holding more than 10-12 ids. Is there any thing tweeking cron possible so i can push/enforce tht root releases memory is any thing else can be done.

plz suggest

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ipcrm can be used to remove ipcs structures
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However you can do a lot of damage removing these things if they are in active use. You need to be SURE that they are not before you remove them.

If programs are stopped properly then things are NOT left in ipcs tables. It is only things dying or being killed with signal 9 (kill -9 or kill -SIGKILL) that leaves this kind of stuff there. Unless this is what's happening then what you have in ipcs IS in active use and should not be deleted.

If you (or one of your users or scripts) isn't doing a lot of kill -9 it is MUCH better to troubleshoot why the application is dying and leaving garbage behind than to work on cleaning it up.

I'd suggest you do a fresh reboot and check to see what is in ipcs after you've started all your applications. That way you'll know what is "usually" there and can use that as a basis for comparision later if you suspect there is too much there.

By the way the biggest memory hog is is of course shared memory segments. Unless you're running a database (Oracle, MySQL) these typically aren't very large. If you are running a database you want them to be fairly large (at least for Oracle) but need to control them from the DB startup rather than the OS. (e.g. for Oracle reduce the size of the SGA if you feel it is eating up all your memory).