topic Re: restricting cpu / memory of a program in Operating System - HP-UX

restricting cpu / memory of a program

Ryan Kogelheide — Thu, 16 May 2002 14:54:22 GMT

I have some Oracle Forms programs that can contain infinite loops (if they are poorly programmed). Is there a way I can restrict the program or watch the system form programs with a certain name and memory/cpu consumption and kill them?

Re: restricting cpu / memory of a program

Stefan Farrelly — Thu, 16 May 2002 15:02:18 GMT

Theres a couple of standard HP products which can help;

1. Process Resource manager. This allows certain processes or groups of them to use only X amount of CPU.

2. Measureware or Glance/UX Pak. This product has an alarmdef file which you can configure to see if processes are running, if theyre using too much cpu or memory or whatever else, then run a script (to report it or you can automatically kill them or whatever).

Both these you have to pay for though.

Re: restricting cpu / memory of a program

Jeff Schussele — Thu, 16 May 2002 15:03:41 GMT

Hi Ryan,

You should consider HP's PRM (Process Resource Manager) program. It's designed to do just that.

See the following for more info:

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/B8733-90007/B8733-90007_top.html&con=/hpux/onlinedocs/B8733-90007/00/00/12-con.html&toc=/hpux/onlinedocs/B8733-90007/00/00/12-toc.html&searchterms=PRM&queryid=20020516-091049

HTH,
Jeff

Re: restricting cpu / memory of a program

A. Clay Stephenson — Thu, 16 May 2002 15:17:25 GMT

While PRM is really the tool you need, I can suggest a Plan B that's free. In the .profiles of these 'rogue' developers use ulimit -d to limit process datasize, ulimit -t to limit process time, or make a wrapper to set ulimits before invoking these programs. After the code has been cleaned up, you can remove the restrictions. Man sh_posix and look for ulimit for details.

Re: restricting cpu / memory of a program

Roger Baptiste — Thu, 16 May 2002 17:44:27 GMT

PRM is a good tool, but it costs bucks and is useful if you want to divide CPU and other resources between different user groups who have equal claim on the system.

But your case seems to be due to lazy/careless programmers or probably with folks in a testing env. in that case, option 2 is better.
Run it as a cron job.

HTH
raj

Re: restricting cpu / memory of a program

Tom Danzig — Thu, 16 May 2002 20:00:08 GMT

You could also start the forms program using a higher nice value to limit it's priority for CPU usage. Also free.