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11554 - New System 4.7 Performance Issues
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New System 4.7 Performance Issues
Hi Craig,as you are not on Regatta with your 840 DB-Server, for you the "old
rule" of 2GB per CPU would be the one.
As you are on 1,5GB/CPU on the DB-Server, you may be hit by this
problem. This is even perhaps more the case, because we know, that
the appl-server part needs less memory than the DB-server part of
SAP. The 2GB/CPU is calculated for a 2-tier system. As you are
running 3-tier, I could imagine, that even 2GB/CPU wouldn't be
sufficient.
But, as every system is always different, it is really not possible,
to tell you this from just these figures. I would say, that this
needs to be investigated on your system either remote-online or
within 24 hours after the point of time you want to test, because
part of the data disappears within a day.
I guess, you are on V5R1. As V5R2 needs perhaps a bit more memory,
you definetely have to consider, test & evaluate the above things
before your OS upgrade!
The appl-servers are not of real interest, because they normally
need far less memory. So, they are more than fine on your site.
Regards
Volker
--- In DoNotReply@consolut.eu, "sapbasisguy"
<craig_welchZb...> wrote:
> Hi Volker,
>
> We are on an 840 so we are not fortunate enough to have regatta
class
> hardware yet. We are also 3-tier with 830 application servers. Is
the
> memory calcuation the same for our hardware/landscape
configuration?
> Is 3 gig/CPU the current standard? I've heard 2 gig/CPU more
often.
>
> Does the memory recommendation apply to both the Application
server
> and the database server?
>
> We're currently at 24 CPU/36 gig of memory on the database server
and
> 8 CPU/16 gig of memory on the application servers. Will this have
a
> high probablility of causing us performance problems?
>
> Thanks,
> Craig
>
>
> --- In DoNotReply@consolut.eu, "Volker Gueldenpfennig"
> <volker.gueldenpfennigZs...> wrote:
> > Hi Darrell,
> >
> > you are talking of "disk activity utilization of below 50%
across
> the
> > drives."! If you are really talking of WRKDSKSTS the busy
column,
> > this would be your problem here! Everything above 20% is bad and
> > higher 30% is more or less DEAD. So, your system is totally
dead -
> > sorry for the expression.
> >
> > V5R2 needs a lot of memory. As you are having an 825, you are
using
> > regatta hardware, which requires mostly 3GB per CPU, which
results
> in
> > your case in 6 GB instead of 3GB.
> > As V5R2 had a lot of performance issues in the beginning, it
would
> be
> > definetely necessary, that you would install the latest PTFs as
> well
> > (CUM & DB-Fix-Pack).
> >
> > As soon as you did these things, it will look a lot better on
your
> > system.
> >
> > Sorry for this "bad advice", but either you buy enough hardware
or
> > will always struggle with performance,
> >
> > Volker
> >
> > --- In DoNotReply@consolut.eu, "Darrell Doyle"
> > <Darrell.DoyleZc...> wrote:
> > > We are new in the SAP world and have hired consultants to
handle
> > the installation of SAP. The 4.7 ASCII Enterprise system is
> installed
> > and the OS level is V5R2. We have a new iSeries 825
(LPAR)
> > with 2 processors and 3 gig of memory running in DEV/QAS. Disk
> > storage is 350gig with 70% being used. The performance get very
> slow
> > when 20 to 25 people get on the system to do training and
> > configuration. Even logons are slow. When we look at the AS/400
> green
> > screen (WRKSYSSTS & WRKACTJOB) we show at a high of 38% CPU
> > utilization and disk activity utilization of below 50% across
the
> > drives.
> > >
> > > Is there something in SAP that can tell me if we are using all
> the
> > resources on the AS/400? I've used ST04, RZ10, SM50 but am not
sure
> > what the
> > > settings should be. Memory usage seems to be low megabytes.
> > >
> > > Thanks for any help you can give me.
> > >
> > > Darrell D. Doyle
> > > Chief Information Officer
> > > 713.590.7025
> > >
> > >
> > >
> > >
> > >
> > > [Non-text portions of this message have been removed]
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ABAP Short Reference rdisp/max_wprun_time - Maximum work process run time
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