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12729 - Performance on 46C
Vendor Master (General Section) CPI1466 during BackupThis documentation is copyright by SAP AG.
Performance on 46C
Hello Des,The problem is that your 730 2-way at 1050 CPW has a CPU value from 525 per
CPU and the (old) S30 with 1794 CPW has only a CPU value from 225 per CPU.
This means that a CPU from 730 is twice as fast as a CPU from S30 and some
transactions in 4.6C compared with 4.0B need at least a CPU which is 30-100
% faster to have the same response times.
Therefore you do not need more CPU's; you need always faster CPU's when you
upgrade to a newer release.
Regards, Vincenzo
-----Ursprüngliche Nachricht-----
Von: neib154 [mailto:desmond_olwageZgoodyear.co.za]
Gesendet: Mittwoch, 28. Januar 2004 22:39
An: DoNotReply@consolut.eu
Betreff: Re: Performance on 46C
Hi, Doreen.
The box we moved from (730) was a 2-way with a CPW of 1050. The CPW
of the S30 8-way (new box) is 1794. Both boxes are/were running
V5R2. The 730 had 8 GB memory and the S30 now has 12 GB. The S30 has
105 disks in the system ASP, consisting of 4, 8 and 16 GB drives. I
know that IBM doesn't recommend combining more than 2 different disk
sizes, but we didn't have the performance issue prior to the upgrade
to 4.6C.
My concern is that the CPU hardly goes above the 20% mark, which
indicates that the box is still "idling". I can't understand why the
SAP responses are so bad if the CPU isn't that busy.
I have checked the EarlyWatch reports that have been generated by
the data that my DEV system has sent. The reports definitely warn of
performance issues, but don't give me any clue as to what to look
for, other than updating my kernel patch level (which was current at
the time of the upgrade to 4.6C).
Any suggestions?
Thanks.
Des
--- In DoNotReply@consolut.eu, "Anderson, Doreen"
<dandersoZb...> wrote:
>
> What are your CPW ratings on the 2 boxes?
>
> What operating system? V5R1 and beyond really likes a lot of
memory
> (closer to 2gb or more per processor)
>
> WRKDSKSTS - are the drives too busy (size of drives? # of
controllers?)
>
>
> Doreen
>
> -----Original Message-----
> From: desmond_olwageZg...
> [mailto:desmond_olwageZg...]
> Sent: Wednesday, January 28, 2004 9:45 AM
> To: DoNotReply@consolut.eu
> Subject: Performance on 46C
>
>
>
>
>
> Hi group.
>
> We recently upgraded our DEV system from 3.1i to 4.6C. Prior to the
> upgrade, our DEV system was migrated from a model 730 2-way
processor
> with
> 8 GB RAM and about 290 GB disk to a model S30 8-way processor with
12 GB
> RAM and about 700 GB disk.
>
> After the upgrade to 4.6C, the average dialog response times on the
> system
> have dropped from around 400 ms to around 1300 ms (3 times!)! When
> checking
> the performance data in OS06, I see that the average CPU time
alone is
> in
> the region of 800 ms.
>
> Does anyone have an idea as to why this huge degradation in
performance
> has
> occurred? Is it normal for this degradation when upgrading to a 46C
> system?
> Any ideas as to what I can check or change to improve this please?
>
> Thanks in advance for any assistance!
>
> Regards,
>
> Des Olwage
> Snr. Systems Administrator
> Goodyear South Africa
> Tel. +27 41 5055441
> Fax +27 41 5811195
> Cell. +27 82 824 6900
>
>
> Have a look to our homepage at: http://www.consolut.net
> DoNotReply@consolut.eu
>
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