topic Re: Real TIme Process Memory Usage in Operating System - HP-UX

Real TIme Process Memory Usage

Kevin McNamara_1 — Thu, 19 Apr 2007 09:41:54 GMT

I need to monitor process memory usage in real time. What command can I use to display the amount of memory a proces is currently using?

Re: Real TIme Process Memory Usage

Sundar_7 — Thu, 19 Apr 2007 09:43:16 GMT

Glance if you have it installed and license.

# glance (or gpm)

Re: Real TIme Process Memory Usage

Marco A. — Thu, 19 Apr 2007 09:52:21 GMT

the command "top" also has a good view of the memory usage and processes running.

#top

Marco

Re: Real TIme Process Memory Usage

A. Clay Stephenson — Thu, 19 Apr 2007 09:53:49 GMT

If you don't have Glance then all you need is ps with the XPG4 behavior asserted.

Determine the process PID of interest using ps in the normal fashion then:

UNIX95=1 ps -p PID -o comm,vsz,etime

Re: Real TIme Process Memory Usage

Jaime Bolanos Rojas. — Thu, 19 Apr 2007 10:56:01 GMT

Kevin,

Also this thread talks about process memory
usage, please check it as it looks very helpful too:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=838754&admit=-682735245+1176998017125+28353475

Regards,

Jaime.

Re: Real TIme Process Memory Usage

Kevin McNamara_1 — Fri, 20 Apr 2007 08:46:35 GMT

Thanks for all the replies. I like the "UNIX95 ps" command. I can use this in a script. But, the VSZ that it reports does not match the RSS column (This consists of text, data, stack, as well as the process memory) in Glance. How can I get the "UNIX95 ps" command to report the RSS value from Glance?

Re: Real TIme Process Memory Usage

A. Clay Stephenson — Fri, 20 Apr 2007 09:49:46 GMT

Asking ps to give you the same values as a sophisticated tool like Glance isn't all that realistic. It is very difficult to decide just what per-process memory usage means. How does shared memory count? How about shared text? In any event, since you have Glance, you can use the command-line interface (-adviser-only option) and get whatever metrics you are interested in. A search should turn up tons of examples.

Re: Real TIme Process Memory Usage

Don Morris_1 — Fri, 20 Apr 2007 10:50:02 GMT

Setting aside differences in precision between Glance vs. pstat [which is where ps gets the data], one big reason for a discrepancy here is that you want SZ from ps (physical memory size) if you're comparing RSS.. not VSZ (virtual memory size).

Re: Real TIme Process Memory Usage

Kevin McNamara_1 — Fri, 20 Apr 2007 11:38:09 GMT

Thanks again for the great info. I think using the advisor_only feature of Glance is going to do the trick.