Re: TSM Client/AIX/Sybase paging space problem

2001-05-14 13:24:50
Subject: Re: TSM Client/AIX/Sybase paging space problem
From: Robert Clark <res03db2 AT GTE DOT NET>
Date: Mon, 14 May 2001 10:26:29 -0700
I've seen some weird problems with paging space getting used
up on some of our AIX 4.3.3 systems running Sybase 12 and
dsmc as well.

I'm out of the office today, but will try to check into the
details when I'm back in the office.

Could you please send either the list, or me, info on what you
find? I'll send you anything I find.

(My first thought would be to see if running the backups from
an external scheduler does. I wonder if the resident/paging
size of "dsmc sched" increases over time.)

Thanks, [RC]

On Fri, May 11, 2001 at 09:43:11AM -0400, David Longo wrote:
> We have a new installation that has problems in that paging space continues 
> to grow until it hits 100% over about 8-10 days.  Having setup a cron job on 
> AIX that logs paging every 5 minutes, I determined that essentially the only 
> time paging space increases is when backups are running.  We reboot to clear 
> problem.
> Details:
> TSM Server is on AIX 4.3.3
> Client is:
> IBM RS/6000 Silver SP node w 2x 332 MHz processors and 1GB RAM and 1GB paging 
> space.  (Node is standalone and not "fenced".)
> AIX 4.3.3. Maint Level 7
> Sybase ASE (Using raw logical volumes  for db - vendor insisted on 
> this)
> SQL Backtrack 4.5.00 with OBSI module 2.5.00
> TSM Client
> The paging space will jump up about 4 -8 % per day.  I do SQLBT backup of 
> database at 12:15 am and regular FS incremental at 2:15 am.  Paging space 
> incresases when each backup starts and does not go down.
> I saw info on Tivoli site that TSM client (which I was using) had 
> memory leak problems on NT and possibly other platforms, so I downloaded what 
> I saw as latest AIX version, and installed - no change.
> I have on other AIX and NT boxes with no problems.
> We had ML 6 of AIX on and was happening with it too, upgraded to ML 7 for 
> other reasons and no change.
> This is a new install, users not on system yet, Database is getting info from 
> another system and apps are being developed to generate reports from this DB.
> Last night I disabled both backups and NO PAGING SPACE increase occured.
> One other bit of info (maybe confusing).  Using the svmon command, it seems 
> to indicate that Sybase is the user of the growing paging space!
> Any ideas folks?  It is not obvious to me how a regular FS incremental can 
> cause Sybase to use additional paging space.
> If no one has a solution I will open a ticket with Tivioli to start with and 
> then proceed down the line one vendor at a time.
> Thanks for your head scratching,
> David B. Longo
> System Administrator
> Health First, Inc.
> 3300 Fiske Blvd.
> Rockledge, FL 32955-4305
> PH      321.434.5536
> Pager  321.634.8230
> Fax:    321.434.5525
> david.longo AT health-first DOT org
> "MMS <>" made the following
>  annotations on 05/11/01 09:44:40
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