RE: Why separate pools?

["Ingvaldson, Scott" <SIngvaldson@xxxxxxxxxxxx>]

From:
http://www-912.ibm.com/s_dir/slkbase.nsf/3cdf5d853ca698198625680b00020369/9f
a68bd7573e48af862565c2007d3d9b?OpenDocument&Highlight=0,expert,cache

A shared pool is a pool in which multiple subsystems can run jobs. The
advantage of shared pools is the flexibility of sharing memory between pools
if it is not being used. System value QPFRADJ adjusts memory to maximize
resources on a dynamic system. Shared pools can also use Expert Cache by
setting the paging option on the WRKSYSSTS or WRKSHRPOOL to *CALC.

Also see:
http://www-912.ibm.com/s_dir/slkbase.nsf/3cdf5d853ca698198625680b00020369/94
c4a880d42db9a5862565c2007d4048?OpenDocument&Highlight=0,expert,cache

I would set all but the machine pool to *CALC.

Yesterday you asked how to know which pool to move memory from when using
the CHGSHRPOOL command.  I didn't think of it at the time, but I'm pretty
sure that the excess memory always moves to/from *BASE.  If you try to move
too much you'll get msgCPD1103.  After you move it, QPFRADJ will just 'fix'
it anyway....

I don't know how much spool work you have and I know that the change is
minimal, but my guess is that *SPOOL is overcommited on this system.  I
would try setting *SPOOL to 100M/*CALC and see if QPFRADJ moves it back up.

If you really want to have fun, try profiling your interactive transactions:
http://www-912.ibm.com/s_dir/slkbase.nsf/3cdf5d853ca698198625680b00020369/b4
88791484788c8e8625661300723456?OpenDocument&Highlight=0,profile,interactive

If you do have a bottleneck in your system, this will point it out.

Regards,
 
Scott Ingvaldson
iSeries System Administrator
GuideOne Insurance Group

-----Original Message-----
date: Wed, 24 Nov 2004 08:36:14 -0500
from: rob@xxxxxxxxx
subject: Re: Why separate pools?

How does one make a determination on what is a "shared pool" and should be 
set to *CALC?

              Defined    Max   Allocated   Pool  -Paging Option--
Pool         Size (M)  Active  Size (M)     ID   Defined  Current
*MACHINE      1407.56   +++++     1407.56    1   *FIXED   *FIXED 
*BASE         6670.02    1337     6670.02    2   *CALC    *CALC 
*INTERACT     4871.39     458     4871.39    3   *FIXED   *FIXED 
*SPOOL         269.19      46      269.19    5   *FIXED   *FIXED 
*SHRPOOL1     5083.87      80     5083.87    4   *CALC    *CALC 

Rob Berendt
-- 
Group Dekko Services, LLC
   
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