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IDS Forum

Re: Does IDS11 needs or uses more temp space

Posted By: Art Kagel
Date: Tuesday, 25 October 2011, at 2:43 p.m.

In Response To: Re: Does IDS11 needs or uses more temp space (Peter_Logan@spartanstores.com)

sysmaster:sysprofile

sysmaster:syssesprof

These tables have numsorts and disksorts statistics for the server as a
whole and for each session. Obviously memory sorts are the difference.

Art

Art S. Kagel
Advanced DataTools (www.advancedatatools.com)
Blog: http://informix-myview.blogspot.com/

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

On Tue, Oct 25, 2011 at 2:31 PM, Peter_Logan@spartanstores.com <
Peter_Logan@spartanstores.com> wrote:

> Art,
>
> Is there an onstat or series of onstats that will show how much of the
> sorting is going go disk ...
>
> Peter Logan
> Senior Database Administrator
> Phone: 616/878-8309
>
> From: "jpierrot@chubb.com" <jpierrot@chubb.com>
> To: ids@iiug.org
> Date: 10/25/2011 02:29 PM
> Subject: Re: Does IDS11 needs or uses more temp space [25280]
> Sent by: ids-bounces@iiug.org
>
> Thanks! I will adjust DS_NONPDQ_QUERYMEM to a value between 15 and 50M=
> B.
>
> jp
>
> =
>
> From: "Art Kagel" <art.kagel@gmail.com> =
>
> =
>
> To: ids@iiug.org =
>
> =
>
> Date: 10/25/2011 02:19 PM =
>
> =
>
> Subject: Re: Does IDS11 needs or uses more temp space [25278] =
>
> =
>
> Sent by: ids-bounces@iiug.org =
>
> =
>
> NO! The default in 7.31 was 15MB of memory for in-memory sorting. In 11=
> ...xx
> the default if you don't set anything is 128KB of memory for in-memory
> sorting that means that where say 5% of your sorting was going to disk,=
> now
>
> 80% of your sorts are now going to disk.
>
> Art
>
> Art S. Kagel
> Advanced DataTools (www.advancedatatools.com)
> Blog: http://informix-myview.blogspot.com/
>
> Disclaimer: Please keep in mind that my own opinions are my own opinion=
> s
> and
> do not reflect on my employer, Advanced DataTools, the IIUG, nor any ot=
> her
> organization with which I am associated either explicitly, implicitly, =
> or
> by
> inference. Neither do those opinions reflect those of other individuals=
>
> affiliated with any entity with which I am affiliated nor those of the
> entities themselves.
>
> On Tue, Oct 25, 2011 at 2:15 PM, <jpierrot@chubb.com> wrote:
>
> > In 7.x I did not set DBUPSPACE and DS_TOTAL_MEMORY so everything
> > defaulted and in 11.x I have not set up DS_TOTAL_MEMORY and
> DS_NONPDQ_QUERYMEM
> > is set to default 128k. Doesn't that coincide to the profile that I h=
> ad
> > under 7.31. Right!
> >
> > jp
> >
> > [image: Inactive hide details for "Art Kagel" ---10/25/2011 01:12:38
> > PM---Most likely the significant portion of the difference is sort]"A=
> rt
> > Kagel" ---10/25/2011 01:12:38 PM---Most likely the significant portio=
> n of
>
> > the difference is sort-work files. Under 7.xx memory space u
> >
> >
> > From:
> > "Art Kagel" <art.kagel@gmail.com>
> > To:
> > ids@iiug.org
> > Date:
> > 10/25/2011 01:12 PM
> > Subject:
> > Re: Does IDS11 needs or uses more temp space [25276]
> > Sent by:
> > ids-bounces@iiug.org
> > ------------------------------
> >
> >
> >
> > Most likely the significant portion of the difference is sort-work fi=
> les.
>
> > Under 7.xx memory space used for non-PDQPRIORITY sorting was controll=
> ed
> by
> > the environment variable DBUPSPACE which defaulted to 15MB and had a
> range
> > of 15-50MB. Under 10.00 and later this variable is noop and non-PDQ
> sorting
> >
> > memory space is controlled by the new ONCONFIG parameter
> DS_NONPDQ_QUERYMEM
> >
> > which defaults to 128K if not set (and this is also the setting in th=
> e
> > onconfig.std sample file) and has a range from 128K to 25% of
> > DS_TOTAL_MEMORY. You need to increase DS_NONPDQ_QUERYMEM to whatever =
> you
> > used to set DBUPSPACE to and at least 15MB to return to the performan=
> ce
> > profile you had under 7.31. If you do not set DS_TOTAL_MEMORY current=
> ly
> you
> >
> > may also have to set that to permit the setting of DS_NONPDQ_QUERYMEM=
> you
>
> > want to set.
> >
> > Art
> >
> > Art S. Kagel
> > Advanced DataTools (www.advancedatatools.com)
> > Blog: http://informix-myview.blogspot.com/
> >
> > Disclaimer: Please keep in mind that my own opinions are my own opini=
> ons
> > and
> > do not reflect on my employer, Advanced DataTools, the IIUG, nor any
> other
> > organization with which I am associated either explicitly, implicitly=
> , or
>
> > by
> > inference. Neither do those opinions reflect those of other individua=
> ls
> > affiliated with any entity with which I am affiliated nor those of th=
> e
> > entities themselves.
> >
> > On Tue, Oct 25, 2011 at 12:14 PM, jpierrot@chubb.com
> > <jpierrot@chubb.com>wrote:
> >
> > > Since an upgrade to IDS11 from IDS7.x, the instance seems to consum=
> e
> mo=3D
> > > re
> > > temp space for the same tasks. Resulting in not enough temp space
> while=3D
> > >
> > > building indexes on temp table and/or a -131 error code during some=
> ot=3D
>
> > > her
> > > activities. There are about 17GB of temp space of about half a gig
> > > each...in 7.31.UD8 everything worked fine with no issues with only =
> 8GB
> =3D
> > > of
> > > tmp space. Now we are on IDS11.50.FC7X0 and AIX6.1
> > > During some ops, I can see huge hashtemp table build, the below is
> noth=3D
> > > ing
> > > comparing to what I saw while monitoring the instance.
> > >
> > > Number of Size in
> > > DBS:Table Name Extents Mbytes
> > >
> > > HASHTEMP:th_probe_ffffffffffffffff 1488 1514.73
> > >
> > > Is there any onconfig params that one can enable/disable to overrid=
> e
> th=3D
> > > is
> > > effect or to limit temp space consumption/sorting or things that
> happen=3D
> > > in
> > > temp.
> > >
> > > OPTCOMPIND is currently set to 2
> > >
> > > Any insights would be greatly appreciated!
> > >
> > > Regards,
> > >
> > > jp=3D
> > >
> > >
> > >
> > >
> >
> ***********************************************************************=
> ********
>
> >
> > > Forum Note: Use "Reply" to post a response in the discussion forum.=
>
> > >
> > >
> >
> > --90e6ba6e868e22448904b022a36c
> >
> >
> >
> ***********************************************************************=
> ********
>
> >
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
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> >
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>
> --bcaec529a0a1d973c604b023917c
>
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> Forum Note: Use "Reply" to post a response in the discussion forum.
>
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