ADSM-L

Re: Memory Tuning For AIX

2002-01-03 09:14:15
Subject: Re: Memory Tuning For AIX
From: "Mr. Lindsay Morris" <lmorris AT SERVERGRAPH DOT COM>
Date: Thu, 3 Jan 2002 09:10:55 -0500
We solved this exact problem by reducing BUFPOOLSIZE in dsmserv.opt.  It was
set very high, causing TSM to (apparently) pin that much memory for its own
use - then the OS didn't have enough.  Symptoms: high paging, rotten TSM
performance, admin sessions took minutes to connect.

Recommend using SELFTUNEBUFPSIZE. (If you already are, then this advice
won't help of course.)
Good luck.

----------------------------
Mr. Lindsay Morris
Mr. Lindsay Morris
CEO
Applied System Design
www.servergraph.com <http://www.servergraph.com>
859-253-8000 ofc
425-988-8478 fax
> > Hello-
> > I am having a memory problem.
> > I am runnning AIX 4.3.2 on a H50.  TSM is the only application
> > running on the server.  When I run vmstat I get the following...
> >
> > kthr     memory             page              faults        cpu
> > ----- ----------- ------------------------ ------------ -----------
> >  r  b   avm   fre  re  pi  po  fr   sr  cy  in   sy  cs us sy id wa
> >  0  0 136233   202   0   3   2  99  210   0  52  240  66 17 30 16 37
> >  1  3 136234   342   0  38  11 3727 4204   0 1322 6136 4665 12 11  3 74
> >  2  3 136236   160   0  44  12 3728 5326   0 1324 5844 4644 10 11  2 76
> >  1  3 136237   295   0  17  19 4113 5725   0 1305 7174 5091 13 10  3 74
> >  0  3 136237   629   0  19   9 4240 7442   0 1316 7200 5082 14 13  5 68
> >
> > Does this look normal to anyone?  From my limited understanding
> of vmstat
> > it looks like:
> > CPU utilization is maxed out
> > I have blocked processes (the b column)
> > The scan rate (sr) column is very high.
> > The server has 1Gig of memory.  I'm really not sure how to tell how much
> is
> > allocated to
> > the OS and how much is allocated to TSM.  Does anyone have any ideas or
> > pointers is
> > tuning memory for AIX?  Do I need a memory upgrade?
> > I started checking this because my server response is horrible.
> > Thanks.
> > Denis
> >
>
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