• Subject: CPU Percentage Flex, Lies, and Usage Measuring Tape
  • From: DAsmussen@xxxxxxx
  • Date: Sun, 27 Jul 1997 23:18:54 -0400 (EDT)

Hey Folks,

Now it's my turn to ask a couple of questions.  Since our upgrade to 3.7
(production) and 3.2 (development system), jobs no longer seem to get the CPU
that they deserve when running independently of the users.  Case in point,
I'm running our BPCS shop order purge this weekend which removes data from
approximately 23 files.  Prior to our upgrade from 3.1, this job (and
rightfully so) consumed about 80% of available CPU at normal batch processing
priority on our production 320.  This weekend, I'm running the purge on both
our new production 530 (3.7) and our newly annointed development 320 (3.2).
 Despite my upping both jobs to priority 10, setting purge for both to *NO,
and setting both timeslices to 100,000, neither is consuming more than 18%
CPU with nobody else on the systems.

Last week, we asked our Systems Engineering department for some help with our
BPCS conversion program's performance under the same circumstances, and they
did _something_ to make it run with more CPU percentage.  I'm not sure that
our manager actually asked, but we were not informed of what Systems
Engineering actually DID to make this program perform better.  In addition, a
program with a loop that was being tested on the (formerly development) 310
took over the CPU, but had negligible impact when we moved to the new 320
CPU.  Does anyone know of anything on the new OS versions that limits CPU
percentages (none of the old limits were in place)?

Secondly, I heard a NASTY rumor that clouds my former anticipation of IBM's
August announcements.  In addition to the 12-way processor, I also hear that
IBM is dropping user-based pricing (which helped the AS/400 get as big as it
is) in favor of returning exclusively to tier-based pricing.  Anyone have
information on this?

TIA,

Dean Asmussen
Enterprise Systems Consulting, Inc.
Fuquay-Varina, NC  USA
E-Mail:  DAsmussen@AOL.COM

"Genius begins great works; labor alone finishes them." -- Joseph Joubert
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