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05112 - Page Faults - Anyway to reduce SAP Storage to Reduce Page Faults

05112 - Page Faults - Anyway to reduce SAP Storage to Reduce Page Faults

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Page Faults - Anyway to reduce SAP Storage to Reduce Page Faults

I do not want to confuse the issue, but I feel that running SAP
in *BASE is a mistake. SAP code likes to take over the world.
Anything you try to run in the same storage pool as SAP will
die. Of course, if you have a big enough engine and enough
main memory, you can do anything. I am sure that there will
be some people that read this and not agree with me. Originally
I did try running in *BASE and eventually ended up with the setup
below.

We are a two tier shop. As I speak we have 289 users logged on
with 621 modes. Our response times range from good to acceptable.

pool size maxact
1 600 +++++
2 624 200
3 500 200
4 70 100
5 4350 200

Pool 1 is the machine pool.
Pool 2 is *base (qbatch, qinter, qsnads, qserver)
Pool 3 (ali400, qvi400, qcmn, qsyswrk,qusrwrk)
Pool 4 (qspl)
Pool 5 R3_03

I would like to have more memory for pool 5, but this setup works the
best for us.


Take care..... Charlie




> -----Original Message-----
> From: bfbray [SMTP:blakebrayZp...]
> Sent: Monday, February 18, 2002 1:36 PM
> To: DoNotReply@consolut.eu
> Subject: Re: Page Faults - Anyway to reduce SAP
> Storage to Reduce Page Faults
>
> I goofed on my original message I posted, I forgot to add the MAXACT
> values, I have since deleted the origianl message and added a new one
> with those values. My MAXACT is set at 200, My Active-->Wait numbers
> are 5000-7000 but the Active-->Inel is always 0. I read a OSS note
> which said the MAXACT should be roughly 1.5 times the number of WP's.
> I wasn't sure if it is the WP's for just the DB server or all WP's
> from the DB and APP Servers. Each APP Server does have a APAIxxxx job
> on the DB server, wasn't sure if these come into play with MAXACT or
> not.
>
> Here are my numbers from WRKSYSSTS:
>
> Pool....Size.......Reserved.....MaxAct
> 1....."1074.20"...."588.87".....+++++
> 2....."12221.79"..."000.10"....."200"
> 3....."16.00"......"000.00"....."5"
>
> --- In SAP on System iZy..., "Anderson, Doreen" <dandersoZb...> wrote:
> > What is your MAXACT setting for *BASE POOL?
> > Our config is very similar with 2 app servers & all users on them
> also
> > Without knowing anymore details; sounds like your MAXACT is set too
> high
> > BUT
> > That is something that you would have to play with and observe
> impact to the performance over time for each change made
> >
> > Below is a snapshot of our DB pool config
> > MB Reserve MAXACT
> > 1 879.32 586.30 +++++
> > 2 11358.67 .08 200
> > 3 50.00 .00 2
> >
> >
> >
> > Doreen Anderson
> > Ball Horticultural Company
> > dandersoZb...
> > (630) 231-3600 x3214
> >
> >
> > -----Original Message-----
> > From: bfbray [mailto:blakebrayZp...]
> > Sent: Monday, February 18, 2002 10:06 AM
> > To: SAP on System iZy...
> > Subject: Page Faults - Anyway to reduce SAP Storage
> to Reduce Page Faults
> >
> > Our DB Server is a 9406-730 with 13gig memory. We have all users
> > logging on to two app servers, we try not to have any users on the
> DB
> > server. Our DB server 3 memory pools, *Machine=1gig, *base=11.9gig,
> > *spool=.1gig. We basically have 12gig in *BASE which runs SAP. Our
> > Non-DB page faults average 200-400 per second (via wrksyssts) and
> > will sometimes peak 1000-2000 per second. I've read in various
> notes
> > and manuals that the SAP memory definitions such as Program Buffer,
> > Paging Area, Extended Memory, Number of WP's do not affect System
> > Performance. Is this a true or did I just misunderstand what I've
> > seen? Are there SAP buffers or other setting which I may have
> > oversized and is causing the high Non-DB page faults? The sizing
> > tools we've used indicates 12gig should enough. Before we go and
> > purchase more memory we'd like to know if something can be cahnged
> to
> > reduce the amount of memory we are currently using. How much memory
> > are others running on the DB server?
> >
> >
> >
> > Have a look to our homepage at: http://www.consolut.net
> > SAP on System i-unsubscribeZy...
> >
> > Your use of consolut is subject to
> http://www.consolut.net
>
>
>
> Have a look to our homepage at: http://www.consolut.net
> DoNotReply@consolut.eu
>
> Your use of consolut is subject to http://www.consolut.net
>

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