Re: V5R3 Performance Issue

["Clare Holtham" <Clare.Holtham@xxxxxxxxxxxxxx>]

That doesn't sound like enough memory! What are you running?? If your apps
include SQL, there used to be a rule of thumb - you need 1gb memory per
processor. Then with later OS that was increased to 2Gb per processor.
OK, I've just checked what a 22A2 is, and it's a 2248 with a 1517
interactive card (25CPW) and only one processor. So it's a small machine,
maybe you're only using it for development. Have you looked at the
Performance Capabilities Reference for V5R3 to see what has changed?? Might
be some clues there.

cheers,

Clare

----- Original Message ----- 
From: "Scott Klement" <midrange-l@xxxxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Sunday, May 22, 2005 6:35 AM
Subject: RE: V5R3 Performance Issue


> Hello Charles,
>
> > What hardware do you have?
>
> Model 270 w/2249 (I think) CPU. Though, DSPSYSVAL QPRCFEAT shows 22A2.  I
> think it has 512mb of RAM.  I skipped V5R1 and upgraded straight from V4R5
> to V5R2, and never saw any performance decrease.  The upgrade from V5R2 to
> V5R3 however has made a big difference.
>
> ---
> Scott Klement  http://www.scottklement.com
>
>
> On Fri, 20 May 2005, Wilt, Charles wrote:
>
> >
> > I saw a significant decrease in performance after moving from v5r1 to
> > v5r2 on a model 400 at my last position.
> >
> > IBM determine that basically I was SOL as the OS had been optimized for
> > the newer hardware.  Luckily, the move to v5r2 was just in preparation
> > for the install of a new 270.
> >
> > Charles Wilt
> > iSeries Systems Administrator / Developer
> > Mitsubishi Electric Automotive America
> > ph: 513-573-4343
> > fax: 513-398-1121
> >
> >
> >> -----Original Message-----
> >> From: midrange-l-bounces@xxxxxxxxxxxx
> >> [mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Scott Klement
> >> Sent: Friday, May 20, 2005 4:35 AM
> >> To: Midrange Systems Technical Discussion
> >> Subject: Re: V5R3 Performance Issue
> >>
> >>
> >> Hello,
> >>
> >>> We installed V5R3 a couple of weeks ago.  Since then one of
> >> our nightly
> >>> critical path jobs has more than doubled in run time.
> >>
> >> I know I'm joining this discussion late (I haven't been able
> >> to keep up
> >> with e-mail this week) but I just wanted to say that I've been having
> >> similar experiences with V5R3.
> >>
> >> Since upgrading from V5R2 to V5R3, pretty much everything on
> >> the system is
> >> slower.  I don't mean just SQL or just database -- pretty
> >> much everything
> >> is slower.
> >>
> >> I suspect that my problem is lack of memory -- that V5R2 used
> >> less memory
> >> than V5R3 and that the difference happened to matter on my
> >> machine, since
> >> I haven't heard anyone else opine that V5R3 is slower.
> >>
> >> Unfortunately, I've been too busy to find that out for sure.
> >> If you come
> >> up with a good solution to your speed problems, please post
> >> them here. I'd
> >> be interested to see what you learn...
> >>
> >> --
> >> This is the Midrange Systems Technical Discussion
> >> (MIDRANGE-L) mailing list
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> >> Before posting, please take a moment to review the archives
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> >>
> >>
> >
> > -- 
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list
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