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Article #411

Re: SAA Memory Problem

#411
From: Robert Ibrom
Date: Mon, 02 Sep 1996 00:00
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Gershon wrote:
> 
> Hi -
> 
> Here's one for the NWSAA experts.
> 
> We're running NWSAA 2.0.30 on Netware 3.12 on a 486.  Hostprint 1.11 is also
> running on the same machine.   The server runs pretty exclusively SAA, with
> very little file/print activity.
> 
> We started out with 16M memory.  When the server was brought up, the Cache
> Buffers stood at about 43%, and the Alloc Memory Pool was somewhere under 2
> MB.  Suddenly, with no console message, the Alloc Memory Pool jumped, eating
> up all the cache buffers, leaving us with 1%, until the server crashed.  The
> wierd part of it is, out of the 7 MB of Alloc Memory Pool, less than 2 MB
> were in use.  What happened to the other 3 MB?  I presume these were supposed
> to return to the Cache Buffer pool but never did, right?
> 
> Next step - SET MAXIMUM ALLOC SHORT TERM MEMORY=2500000.  But that also
> crashed the server.  Some process or NLM must have been looking for memory,
> and couldn't get any.
> 
> To test the problem further, we added another 16 MB memory.  Once again,
> the Alloc Memory Pool started out at less than 2MB.    Yesterday morning,
> I came in and found the Alloc Memory Pool at  * 15,992,208 *   But, as
> before, less than 2 MB were in use.  So I have some 13 MB of memory
> unaccounted for.
> 
> The statistics in Monitor don't seem to reveal much.  The sum total of
> Alloc Short Term Memory (Bytes) seems to total the amount of the Alloc
> Memory Pool in use - 2 MB, not the grand total of almost 16 MB.   So
> the bottom line is - where has all my memory gone?
> 
> All the NLMs are the latest versions, and I'm running all the latest
> patches from Novell.  This problem is only on the SAA server.  We're
> running 30 other 3.12 servers on the campus, and haven't seen this kind of
> problem anywhere else.  I know that Novell 4.10 handles memory better.  It
> has a "garbage collection" process which might be built for just this kind
> of problem.  We will ultimately be upgrading this server, along with all
> of our others.  But we're not ready just yet, if we don't REALLY have to.
> 
> Any ideas?
> 
> -Gershon
> 
> ---------------------------------------------------------------------
> Gershon Kunin                  Internet: Gershon@erez.cc.biu.ac.il
> Data Communications            Tel. +972-3-531-8619
> Bar-Ilan University            Fax: +972-3-534-4446
> Ramat-Gan, Israel 52-900

Hi,

I think I can assist you with your problem, but first of all I need to 
know :

How many session you have on you machine, an how many are usually in use.

Is this machine a EISA machine or not and which kind of Disk controller 
you have ?

What kind of protocolls you use ( only SPX or TCP od APPLE ? )
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From: Robert Ibrom <robert.ibrom@audi.de>
Subject: Re: SAA Memory Problem
Date: 1996/09/02
Message-ID: <322B03BE.FE@audi.de>
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