topic Re: Limit the system resource utilization in Operating System - HP-UX

Limit the system resource utilization

ivychung2 — Tue, 14 Mar 2006 19:50:06 GMT

I want to limit the max. resource ( eg. CPU , memory ) that the user can use , for exampe , userA can max. use 20M memory and 30% CPU only , userB can max. use 50M memory and 50% CPU only , is it possible ? thx.

Re: Limit the system resource utilization

rayche — Tue, 14 Mar 2006 20:13:31 GMT

I think we cannot limit CPU,memory. to resource, we just can limit disk's usage.

Re: Limit the system resource utilization

A. Clay Stephenson — Tue, 14 Mar 2006 20:25:00 GMT

You need a product called Workload Manager; it's not free.

http://h20293.www2.hp.com/portal/swdepot/displayProductsList.do?category=ISS

Re: Limit the system resource utilization

Marc Ahrendt — Tue, 14 Mar 2006 20:40:40 GMT

i think regarding multiple CPUs you could consider the CPU affinity call mpctl() ...haven't really messed with it though, but remember something about restricting certain processes to certain CPUs and that mpctl is called by the application/process itself

Re: Limit the system resource utilization

Alzhy — Tue, 14 Mar 2006 21:46:23 GMT

Peace and Clean Air!

If you are running Enterprise OE (i.e. rp8420 or SuperDome) - you should already have PRM (Process Resource Manager) - it's easy to use.

Set up X, run /opt/prm/bin/xprm ...

Re: Limit the system resource utilization

ivychung2 — Wed, 15 Mar 2006 22:38:35 GMT

Thx all replies ,

I have a case , in the system , there are some large files ( over 5G size ) , the user always use "vi" to read the file , then the system will be hang , I know it is very stupid to direct read the whole file , but the user do , so I would like to control the max. of resource they can use. in the above case , no bulit-in function that can control it ? thx

Re: Limit the system resource utilization

A. Clay Stephenson — Wed, 15 Mar 2006 22:47:19 GMT

You should be able to limit the size file that he is able to vi by putting a ulimit -d in his .profile. This will limit vi's internal buffer.

Re: Limit the system resource utilization

ivychung2 — Wed, 15 Mar 2006 22:54:13 GMT

thx reply ,

If I set the ulimit in the user profile , is it limit the resource that the user can use for all applications ? if yes , if I want to limit the user can use 10M memory only , is it ok ? could advise how to set it ? thx

Re: Limit the system resource utilization

RAC_1 — Wed, 15 Mar 2006 23:00:44 GMT

ulimit -d will limit data size to whatever you specify. That is applicable to all programs/processes he will start.

man sh-posix, man ulimit for details.

Re: Limit the system resource utilization

A. Clay Stephenson — Wed, 15 Mar 2006 23:40:59 GMT

You could also create a wrapper for vi so that it does a ulimit -d and then starts the "real" vi.

Re: Limit the system resource utilization

A. Clay Stephenson — Wed, 15 Mar 2006 23:42:50 GMT

By the way, the real way to fix a user editing a 5GB file is to use a baseball bat on the user's head. I would say that about 1 whack is equivalent to 10MB so you do the math.