topic How to check for memory leak in Operating System - OpenVMS

How to check for memory leak

PatchAdmin — Tue, 02 Dec 2003 07:28:53 GMT

Hi there

How do I check for a memory on an OpenVMS system and what commands must I use to do that.

Re: How to check for memory leak

Ian Miller. — Tue, 02 Dec 2003 07:37:32 GMT

SHOW MEMORY and its variations.

SHOW MEMORY/POOL/FULL shows the paged and non-paged pools. If there is a problem which consumes pool then it shows here as the amount in use continually increases.

SHOW MEMORY/FILE/FULL shows the amount of page and swap file inuse. A memory leak in a proces can show here as the amount of reserved pagefile continually increases.

For a problem with process local pool (P1 pool) then SHOW PROCESS/MEMORY will show the free space continually reducing.

Re: How to check for memory leak

labadie_1 — Tue, 02 Dec 2003 07:38:02 GMT

Hello

If a process has a memory leak, it will use all his pgflquota, and fail with
system-f-exquota

To check the use of pgflquota for a process, use Amds or Availability Manager, available at
http://h71000.www7.hp.com/openvms/products/availman/index.html

or use pquota on the freeware
http://h71000.www7.hp.com/freeware/freeware40/pquota/

regards

Gerard

Re: How to check for memory leak

Hein van den Heuvel — Tue, 02 Dec 2003 09:46:45 GMT

Is this perhaps in relation to
patch kit: VMS731-SYS-V0400

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=284548

Cheers,
hein.

Re: How to check for memory leak

Martin P.J. Zinser — Tue, 02 Dec 2003 10:53:23 GMT

I do not have much experience with it, but I think PCA from the DECset suite should be able
to trace down such problems in application code. If you do indeed experience the SYS4 problem, you best bet is to get the fix from engeneering.

Re: How to check for memory leak

Ian Miller. — Tue, 02 Dec 2003 12:43:41 GMT

If the problem is with a program of your own the heap analyzer feature of the debugger may help. See
http://vms.cc.wmich.edu/disk$openvms0731/000000/731final/4538/4538pro_023.html#dbg_analyzer_ch