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IDS Forum

RE: RE: IDS 7.31 Solaris8 - Long Checkpoints

Posted By: Norma Jean Sebastian
Date: Monday, 16 March 2009, at 1:58 p.m.

In Response To: Re: RE: IDS 7.31 Solaris8 - Long Checkpoints (Art Kagel)

I did.
It is an option, and I most certainly didn't mean to change several
parameters at the same time. I assumed it was common knowledge to tweak
one thing at a time...
Sorry.
NJ

-----Original Message-----
From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of
Art Kagel
Sent: Monday, March 16, 2009 11:54 AM
To: ids@iiug.org
Subject: Re: RE: IDS 7.31 Solaris8 - Long Checkpoints [15164]

Sorry, someone did. My apologies.

Art

On Mon, Mar 16, 2009 at 12:47 PM, kate <kate@iiug.org> wrote:

> I never said to increase buffers, so we are agreeing. I said that IF
YOU
> DID you would need to retune everything.
>
> Thanks!
> Kate Tomchik [ kate@iiug.org ] www.iiug.org
> International Informix Users Group Board of Directors
>
> A computer lets you make more mistakes faster than any invention in
human
> history - with the possible exceptions of handguns and tequila.
> Mitch Ratliffe
>
> ---------- Original Message -----------
> From: "Art Kagel" <art.kagel@gmail.com>
> To: ids@iiug.org
> Sent: Mon, 16 Mar 2009 12:35:18 -0400 (EDT)
> Subject: Re: RE: IDS 7.31 Solaris8 - Long Checkpoints [15159]
>
> > I have to disagree with both of your suggestins Kate. Increasing
> > buffers will only increase the number of dirty buffers at checkpoint

> > time making the checkpoints even longer. Since the OP is using 7.31
> > he only has full integer control of the LRU_MIN/MAX_DIRTY
parameters,
> > so 2/1 is as low as he can go and changing the MIN from 2 to 1 will
> > not help a whole lot if they are increasing BUFFERS to boot. Now you

> > may be right that the instance is too small and they could use more
> > buffers to make EVERYTHING run better and faster, but that's not
> > going to help the checkpoint duration at all.
> >
> > Your the ideas in your other post I'll address there.
> >
> > Art
> >
> > On Mon, Mar 16, 2009 at 12:24 PM, kate <kate@iiug.org> wrote:
> >
> > > No NJ, that would be changing too many things at once. Even Art
has too
> > > many. For starters just change what I said, bounce you engine, and
see
> what
> > > your results are.
> > >
> > > Changing buffers often causes a retune of the whole environment. I

> agree
> he
> > > could be using many more, but lets focus on the current problem
first.
> > >
> > > Thanks!
> > > Kate Tomchik [ kate@iiug.org ] www.iiug.org
> > > International Informix Users Group Board of Directors
> > >
> > > A computer lets you make more mistakes faster than any invention
in
> human
> > > history - with the possible exceptions of handguns and tequila.
> > > Mitch Ratliffe
> > >
> > > ---------- Original Message -----------
> > > From: "Norma Jean Sebastian" <nsebastian@flinnsci.com>
> > > To: ids@iiug.org
> > > Sent: Mon, 16 Mar 2009 11:56:55 -0400 (EDT)
> > > Subject: RE: RE: IDS 7.31 Solaris8 - Long Checkpoints [15154]
> > >
> > > > Kurt,
> > > > It's cool you're not taking more virtual memory segs to get the
work
> > > > done (only 1 "V" in your onstat -g seg output).
> > > > Your engine is only sized to about 413MB, while you said you
have
> > > > 4GB RAM on the server.
> > > >
> > > > In addition to Art Kagel's suggestion he just saw posted....
> > > > Try increasing your buffers... what else is running on the
> > > > server?... increasing buffers is the main thing that will
increase
> > > > the size of your Informix engine... you're on a 7.31 (32bit)
engine
> > > > ... you could max the Informix engine up to about 3.75GB I
think...
> > > > you don't have to go for the full max, but at least double it to

> > > > about 1 GB instead of the 413MB you have now.
> > > >
> > > > Thanks,
> > > > Norma Jean Sebastian
> > > >
> > > > -----Original Message-----
> > > > From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On
Behalf
> > > > Of KURT VAN GOMPEL Sent: Monday, March 16, 2009 10:36 AM To:
> > > > ids@iiug.org Subject: Re: RE: IDS 7.31 Solaris8 - Long
Checkpoints
> > > > [15149]
> > > >
> > > > Hello,
> > > >
> > > > Here's the output op onstat -g seg:
> > > >
> > > > Informix Dynamic Server Version 7.31.UD1 -- On-Line -- Up
10:22:10 --
> > > > 412752 Kbytes
> > > >
> > > > Segment Summary:
> > > > id key addr size ovhd class blkused blkfree
> > > > 94000 1394493441 a000000 268435456 24820 R* 31026 1742
> > > > 94001 1394493442 1a000000 153600000 2948 V 9760 8990
> > > > 94002 1394493443 2327c000 622592 616 M 75 1
> > > > Total: - - 422658048 - - 40861 10733
> > > >
> > > > (* segment locked in memory)
> > > >
> > > > Hello,
> > > > We are running IDS7.31 UD1 on a Solaris8 server with 2 Sparc64
> > > > processors and 4GB RAM.
> > > > It is used for interactive and batch processing.
> > > > When lots of manipulations on the DB are done, it takes
sometimes
> > > > more than 60 seconds to do his checkpoints. Some parameters of
our
> > > > config file: MULTIPROCESSOR 1 NUMCPUVPS 2 SINGLE_CPU_VP 0 NOAGE
1
> > > > AFF_SPROC 0 AFF_NPROCS 0 LOCKS 700000 BUFFERS 100000 NUMAIOVPS 1

> > > > PHYSBUFF 64 LOGBUFF 64 LOGSMAX 600 CLEANERS 8 CKPTINTVL 120 LRUS
8
> > > > LRU_MAX_DIRTY 5 LRU_MIN_DIRTY 2 Any idea how to speed up the
> > > > checkpoints?
> > > >
> > > >
> > >
> > >
> >
>
>
************************************************************************
*****
>
> > > ** Forum Note: Use "Reply" to post a response in the discussion
forum.
> > > ------- End of Original Message -------
> > >
> > >
> > >
> > >
> >
>
>
************************************************************************
*****
> **
> > > Forum Note: Use "Reply" to post a response in the discussion
forum.
> > >
> > >
> >
> > --
> > Art S. Kagel
> > Oninit (www.oninit.com)
> > IIUG Board of Directors (art@iiug.org)
> >
> > Disclaimer: Please keep in mind that my own opinions are my own
> > opinions and do not reflect on my employer, Oninit, the IIUG, nor
> > any other organization with which I am associated either explicitly
> > or implicitly. Neither do those opinions reflect those of other
> > individuals affiliated with any entity with which I am affiliated
> > nor those of the entities themselves.
> >
> > --001636427251eb776a04653f08bd
> >
> >
>
>
************************************************************************
*****
> ** Forum Note: Use "Reply" to post a response in the discussion forum.

> ------- End of Original Message -------
>
>
>
>
************************************************************************
*******
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)

Disclaimer: Please keep in mind that my own opinions are my own opinions
and
do not reflect on my employer, Oninit, the IIUG, nor any other
organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any
entity
with which I am affiliated nor those of the entities themselves.

--0016368324ea8b947104653f4bcb

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