Dear Jørgen,
Thanks a lot for your help.
When you talk about .............
"I have seen seen performance problems like you describe them. It is in many
> cases due to undersized main storage or wrong LPAR config. The most
> frequent error is to use fractions of processors in production LPARs
> (the L3 cache is flushed every time the other LPARs get their share of
> the fractional processor) an other very frequent error is the configuration of
> virtual processors. I bet that your iSeries people have configured a very high
> number of virtual processors in your production LPAR.
>
> If I were you I would configure the production LPAR with 6 desired physical
> processors and 6 desired virtual processors and change the LPAR to capped."
Do you some documentation about Performance issue with R/3 on iSeries OS/400,
please ?.
Besides, we can see that the Z customer code is using a lot of cpu, that the
response
time is bad, and the hardware is working on limit. So, we have now 400
concurrents users
but in the future the users will be about 1400.
So, the sizing was made with imcomplete data.
Thamks your comments.
Martín.
--- jjo@xxxxxx escribió:
>
>
> Martin,
>
> we run our ECC 5.0 and ERP2004 on a 4-way 550 with 3 LPARs.
> It is not exactly the same but still...
>
> we have a totally different setup of LPARs.
> LPAR 1 is configured with 2 physical processors, 2 virtual
> processors and 12 GB main storage. This LPAR is capped and
> this is where we run our production ECC 5.0 and ERP 2004.
>
> LPAR 2 is an i5/OS LPAR for legacy systems, productive
>
> LPAR 3 is for Enterprise Portal and WebAS.
>
> LPAR 2 and 3 are uncapped each with one physical processor and 2 virtual
> processors. LPAR 2 and 3 has 6 GB main storage each.
>
> The idea behind this is that LPAR 2 and 3 will "utilize" free clockcycles from
> the other LPARs. LPAR 1 will run with 2 processors and will not compete for
> or wait for clockcycles from other LPARs.
>
> I have seen seen performance problems like you describe them. It is in many
> cases due to undersized main storage or wrong LPAR config. The most
> frequent error is to use fractions of processors in production LPARs
> (the L3 cache is flushed every time the other LPARs get their share of
> the fractional processor) an other very frequent error is the configuration of
> virtual processors. I bet that your iSeries people have configured a very high
> number of virtual processors in your production LPAR.
>
> If I were you I would configure the production LPAR with 6 desired physical
> processors and 6 desired virtual processors and change the LPAR to capped.
>
> Configuration of the other LPARs depends on the usage of the LPAR, but
> uncapped would be a good place to start.
>
> The 2.2 GHz power5+ processor is the best of the best. Once you overcome
> this initial challange with responsetime, then I am sure that you will be very
> happy with the 570. Also with IS-H :-))
>
> Med venlig hilsen/vänlig Hälsning/Ystävällisin Terveisin/
> Best Regards/Freundlichen Grüßen/Vriendelijke groeten
>
> Mølgaard Data A/S
>
> Jørgen Johansen
> SAP Certified Technology Consultant
> IBM Certified Systems Expert
>
> Phone: +45 64 400 610 Fax: +45 64 400 612 Mobile: +45 20 220 610
> http://www.mgd.dk
>
> Remember... when the sun goes down, iSeries stays up
>
>
>
>
>
>
> Martín Pablo Ponce
>
>
> <martponce@xxxxxxxxx>
>
>
> Sent by:
>
> To
> SAPoniSeries@xxxxxxxxxxxxxxx
> SAPoniSeries@xxxxxxxxxxxxxxx
>
>
>
> cc
>
>
>
> 04-05-2006 15:17
>
> Subject
> [SAPoniSeries] Big
> Performance
> Problem.
>
>
>
> Please respond to
>
>
> SAPoniSeries@xxxxxxxxxxxxxxx
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Dear collegues,
>
> We have a following configuration on an iSeries with OS/400 V5R3M0 and
> database DB2
> 400.
>
> The iSeries have 8 CPU of 2.2 Ghz and 80 disk aprox. and four partition
> LPAR's.
>
> On Lpar 0 is running R/3 Production. It is a Enterprise 4.70 Ext. Set 200,
> SAP Web
> AS 6.20 and Kernel 6.40. THE MAIN POINT here is that we have installed the
> Industry
> Solution IS-H, IS-H-MED.
>
> The Lpar 0 is the main and has assigned 6.5 CPU of the
> CPU shared pool (total 8). The others Lpar has assigned 1, 0.5 and 0.5 CPU
> respectly.
> The Lpar 0 and 1 are uncupped.
>
> For the Lpar 0 the total of CPW's are 23.000, and the total disk are about 50.
>
>
> We're experimenting a big performance problem on Lpar 0.
>
> The response time for the step dialogs are about 5 segundos. The quantity the
> cocurrents
> users are 400.
>
> Have someone installed a landscape like it with the solution IS-H ?.
>
> We need your appointments, please.
>
> Regards,
> Martín Ponce.
>
>
>
>
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