RE: IBM 7.1 performance paper

["McGovern, Sean" <Sean.McGovern@xxxxxxxxxxxx>]

It is a problem if re-optimising causes an application performance
problem.

The IBM 'Implementing SSA's eBPCS on the AS/400 system' redbook states:
-

QPFRADJ: When using BPCS, this value should be set to 0 - Performance
adjust off. Dynamic performance adjustment does not work well with the
way that BPCS jobs run on the system.



-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: 03 February 2011 14:36
To: Midrange Systems Technical Discussion
Subject: RE: IBM 7.1 performance paper

and this is a problem, why?  There's a difference between any rebuild
and 
"excessive rebuilds".  The automatic performance adjustment does not 
adjust all that frequently.  In fact, some tools peddle their wares 
arguing that their products are more responsive.  Meaning, by the time
the 
automatic performance adjustment supplied by the OS kicks in, the peak
may 
actually be past.




Rob Berendt