Resident process memory Size (RSS) *WITHOUT* Glance/gpm

[Olivier Decorse]

Hi,
I'm searching how to display, within a shell script, the Resident Size (RSS) of a particular process, WITHOUT using Glance/gpm.
I read a lot of thread about memory size, using UNIX95 and/or ps -l but i seems that they display only Virtual Size (VSS).
I think it is not possible, but let's read unix performance guru responses ...

guaranteed points !!!

Thanks in advance.

Olivier.

[Fred Ruffet]

"ps -edf -o vsz,args | grep " gives you the core image size in KB. Use sz instead of vsz to have it in pages. It gives something very near from what top displays in RES column, but I don't know wether it's really exact (there are differences between ps and top).

another way is to use glance :)

regards,

Fred

[Fred Ruffet]

Oops, I forgot you must set UNIX95...

[Dietmar Konermann]

Olivier,

have a look at the "sz" metric (in pages) provided by ps(1). Also interesting is the "RES" column of top(1). However, there are differences how shared resources are handled... afaik ps(1) ommits them completely while top(1) includes the process' share of them (e.g. a fifth of a shmem segment if currently 5 processes are attached).

Best regards...
Dietmar.

[Fred Ruffet]

Dietmar,

As you explain it, I think that sz field (or vsz) of ps is nearest to what Olivier want. IMHO, shared memory must not be included in RSS.

Regards,

Fred

[Dietmar Konermann]

Hi, Fred!

You are right... just checked the source to be sure:

...
case FIELD_SZ: (void)printf("%*d", of->width,
(int)(ps->pst_dsize + ps->pst_tsize +
ps->pst_ssize)); break;

case FIELD_VSZ: (void)printf("%*d", of->width,
(int)((ps->pst_vdsize + ps->pst_vtsize +
ps->pst_vssize) * (NBPG / 1024)));
break;
...

So sz is RSS and vsz is VSS... *without* shared resources, just adding data, text and stack.

Best regards...
Dietmar.

[Sorrel G. Jakins]

OK, all you kings and wizards, I sort of follow along but I'm a little thick - can some kind soul post a script that will display rss, something nice and simple that an ex-mgr such as I could cut&paste?

No snide remarks from John Payne, please.....