topic Re: process memory utilization??? in Operating System - HP-UX

process memory utilization???

Alan Meyer_4 — Wed, 14 Sep 2005 11:17:14 GMT

How can I find out how much memory a particular process(PID) occupies?

Re: process memory utilization???

Gavin Clarke — Wed, 14 Sep 2005 11:20:53 GMT

Do you have glance? In which case RSS gives a good indication I believe.

There is alot of content on the forums about this already.

Re: process memory utilization???

Alan Meyer_4 — Wed, 14 Sep 2005 11:20:57 GMT

... from the command line as part of a script???

Re: process memory utilization???

Alan Meyer_4 — Wed, 14 Sep 2005 11:22:06 GMT

can You supply a PID number to Glance in adviser mode and get the util back?

Re: process memory utilization???

Alex Lavrov. — Wed, 14 Sep 2005 11:22:52 GMT

export UNIX95=1

Then "ps -ef -o sz,vsz | grep ".

Read man for more options in XPG4 mode.

Alex.

Re: process memory utilization???

Gavin Clarke — Wed, 14 Sep 2005 11:23:17 GMT

Try this thread:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=830132

It is one of many.

Re: process memory utilization???

Gavin Clarke — Wed, 14 Sep 2005 11:25:08 GMT

Funny,

The thread I linked to was posted by Alex!

Cheers.

Re: process memory utilization???

James R. Ferguson — Wed, 14 Sep 2005 11:26:07 GMT

Hi Alan:

Two easy ways are with 'glance' or simply with 'ps'.

For instance, to find the virtual size ('vsz' in kilobytes), along with the user, parent pid and command line used to start the process, for pid-1593 do:

# UNIX95= ps -p 1593 -o "user,vsz,pid,ppid,args"

Note that there is NO space between 'UNIX95=' and the 'ps' command. This syntax sets the UNIX95 variable ONLY for the duration of your commannd line. It arms the XPG4 behavior. You don't want it to "stay around" in your environment necessarily, so don't export it.

See the manpages for 'ps' for more information.

Regards!

...JRF...

Re: process memory utilization???

Alan Meyer_4 — Wed, 14 Sep 2005 11:55:36 GMT

ok, so how does the vsz*4 value compare to the RSS value found in Glance?

here's the results I get.

#UNIX95= ps -p 11274 -o vsz,pid,args
VSZ PID COMMAND
26684 11274 /opt/Indicative/jre/HPUX11/jre...

From Glance I get this
Process Name PID PPID Pri Name ( 200% max) CPU IO Rate RSS Cnt
--------------------------------------------------------------------------------
java 11274 1 168 root 0.7/ 3.4 84.1 0.0/ 0.4 80.4mb 47

So, 26684 * 4 = 106736kb

and from Glance RSS = 80.4mb Are they suppose to compare?

Re: process memory utilization???

Alex Lavrov. — Wed, 14 Sep 2005 12:06:48 GMT

vsz - virtual size, also the size that swapped out or deactivated.
rss - resident size, the size in the memory.

try to replace the vsz -> sz and I think you'll get close results.

Alex.

Re: process memory utilization???

Alan Meyer_4 — Wed, 14 Sep 2005 12:08:44 GMT

Nope,

UNIX95= ps -p 11274 -o sz,pid,args

yields

SZ PID COMMAND
6411 11274 /opt/Indicative/jre/HPUX11/jre1...

and 6411 * 4 = 25644

???

Re: process memory utilization???

James R. Ferguson — Wed, 14 Sep 2005 12:15:05 GMT

Hi (again) Alan:

The computations are not done exactly the same for both probes.

'glance' includes any shared memory regions and/or shared library regions in its RSS value in addition to the stack, text and data region totals of the process. 'ps' does not.

The units for 'vsz' are 1024 byte chunks. If you use 'sz' then the units are PAGE_SIZE chunks (generally 4096).

To see you PAGE_SIZE, do:

# getconf PAGE_SIZE

Regards!

...JRF...

Re: process memory utilization???

Alan Meyer_4 — Wed, 14 Sep 2005 12:18:43 GMT

Ok, thanks.

And thanks to all for the assistance....

Re: process memory utilization???

generic_1 — Wed, 14 Sep 2005 12:32:40 GMT

glancepluss can be usefull too too :)

Re: process memory utilization???

Alex Lavrov. — Wed, 14 Sep 2005 12:46:04 GMT

Hmm, so the only difference between "sz" and "vsz" is the measuring units?

Alex.

(zero plz)

Re: process memory utilization???

Alex Lavrov. — Wed, 14 Sep 2005 13:00:00 GMT

http://nixdoc.net/man-pages/HP-UX/man1/ps.1.html

Yep, looks the same. Everyday you learn something new.

And vsz and sz are the same if you calculate ~25MB. Like it was said, without shared memory and other stuff, only core image of the proc.

Alex.

Re: process memory utilization???

Alan Meyer_4 — Wed, 14 Sep 2005 17:32:50 GMT

close thread