Re: [QPFRADJ/BPCS] -- MIDRANGE-L

Samantha:

<disclaimer>
Everything in here is pure personal opinion from personal experience. I have no 
education background in this area other years of reading manuals, articles and 
just plain trying stuff. IBM might have far better answers.
</disclaimer>

No way to know if it'll help in **YOUR** system. If you look through your 
subsystems and find that you have any tasks running in *BASE (possibly with the 
exception of the subsystem monitors) rather than in private or shared pools or 
if you really have no memory to shift anyway or many other possible factors, 
then it might not help at all. I suppose in the worst cases, it could even make 
things worse.

It often seems to me that IBM tends to ship configurations that are not well 
suited for good performance. Just check how many of their default entries point 
to *BASE, e.g., routing entries to support TCP/IP. And since they get income 
from selling memory, that makes sense. To be fair, though, they cannot have a 
good idea of what **YOUR** system needs at the time of delivery.

But people are commonly unwilling to change those entries to point to another 
pool. Further, new custom entries often follow those default examples. So, the 
memory in *BASE is constantly in use, so performance adjuster has no clean way 
to shift memory around directly and QPFRADJ has minimal effect.

Quite a while back, I put together a memory pool configuration utility that 
I've used with what seems to be decent success. It changes most *sbsds' pool 
settings, changes any routing entries, changes prestart job entries, etc., to 
settings that have worked for me. I run it on any new AS/400 I'm responsible 
for and QPFRADJ=3 has seemed to give noticable improvement.

From this, I've believed QPFRADJ has significant value when it's used on 
appropriately configured systems. (And it might work much better if I knew for 
certain what "appropriately configured" really was.)

But, will QPFRADJ=3 work well for you? Maybe. Post your subsystem descriptions, 
routing entries, pool definitions, etc., and let's see. (Toungue-in-cheek 
comment but based on at least some unfortunate reality.) At the worst, you can 
always set the value back.

Tom Liotta

On Wed, 25 July 2001, "Samantha L Smith" wrote:

> Really want to know if anyone has had any issues using QPFRADJ, set to 3,
> with an ERP like BPCS, had conflicting recommendations.


-- 
Tom Liotta
The PowerTech Group, Inc.
19426 68th Avenue South
Kent, WA 98032
Phone  253-872-7788
Fax  253-872-7904
http://www.400Security.com


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