topic Re: how much memory does he want? in Operating System - HP-UX

how much memory does he want?

steven Burgess_2 — Tue, 26 Mar 2002 05:17:36 GMT

Hi

I've been asked to look at the mib2agt process as it appears to be taking up a lot of memory on one of our systems.

There is a know issue (and patch)

The questions is regarding how to see how much mem the process is using

i'm running the following command to check this

UNIX95= ps -e -o ruser,vsz,state,pid,args|sed '1d'|sort -rnk2 |grep mib2agt| more

this returns

root 966952 S 853 /usr/sbin/mib2agt

the definition for vsz is

The size in kilobytes (1024 byte units) of the
core image of the process.

Am i correct in my calculation thinking this process is using almost a meg of memory
T
hanks in advance

Steve

Re: how much memory does he want?

S.K. Chan — Tue, 26 Mar 2002 05:49:46 GMT

Actually it's close to 1GB. By definition, vsz is "the size of the process in virtual memory in kilobytes as a decimal integer".

Re: how much memory does he want?

steven Burgess_2 — Tue, 26 Mar 2002 06:45:14 GMT

SK

Thanks for the reply, i initially looked and thought, thats nearly a gig, but though it to be unbelievably high

ok

I understand the concept of virtual memory, but, at the moment the process from the UNIX95 command
VSZ
root 68 16 11722 grep mib2agt

Then from glance

mib2agt 853 1 154 root 0.0/ 0.0 0.0 0.0/ 0.0 107.5mb

whats RSS?

Whats the difference in the 2 figures

Thanks in advance

Steve

Re: how much memory does he want?

Steven Gillard_2 — Tue, 26 Mar 2002 12:34:42 GMT

RSZ = Resident set size
VSZ = Virtual set size

RSZ is a subset of VSZ - the portion of the processes memory which is 'resident' in physical memory (ie not paged out). VSZ is the total size, including resident and non-resident pages.

These values are totals, obtained by adding up the memory utilisation of the processes various memory segments (of which there can be lots). Its not uncommon for glance and ps to report slightly different results. For more detail get glance to give you a memory report for that process - you will then see a list of all the processes memory segments.

An unpatched mib2agt process is a well known memory leaker on HPUX. Once you've got the SNMP agent patch installed everything will be fine.

Regards,
Steve

Re: how much memory does he want?

harry d brown jr — Tue, 26 Mar 2002 12:41:19 GMT

Steven,

That's not a memory LEAK, that's a memory SIEVE. That warrant's an immediate patch install.

live free or die
harry