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Re: Cognos and Informix are not playing nice toget

Posted By: Art Kagel
Date: Thursday, 9 February 2012, at 4:46 p.m.

In Response To: Cognos and Informix are not playing nice together (John Adamski)

Make sure that TEMPTAB_NOLOG is set to '1' in your ONCONFIG file. That
will force all temp tables to be unlogged and so, unless the CREATE TEMP
TABLE statement has an IN <logged dbspace> clause it will be placed in one
of the temp dbspaces.

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 Thu, Feb 9, 2012 at 4:00 PM, John Adamski <adamski@graceland.edu> wrote:

> IBM Informix Dynamic Server Version 11.50.FC6
> (three 2GB tempdb space configured; DBSPACETEMP temp0:temp1:temp2)
> HP-UX B.11.31 ia64 (BL870c integrity server)
> Cognos 10.1.1
>
> Note:
> Since we get our Informix & Cognos licenses from our ERP provider we do not
> have direct access to IBM support. And getting our ERP provider to pass a
> problem to IBM and getting direct help from IBM is almost impossible to do.
>
> This problem has made me conclude I no longer know anything about how
> Informix
> works.
>
> The problem:
>
> We have a hand full of Congos reports that take large chucks of resources
> when
> running. One report caused the rootdb space to fill up. This one report
> would
> lead me to believe the temp/sort tables the sql from the report generated
> used
> rootdb instead of the configured temp dbspaces. I don't know Cognos and
> assumed it would let Informix handle the sort/temp space allocation.
>
> Question 1: anyone know if Cognos somehow override what is configured in
> the
> onconf file? Or have any theories why my rootdb space would fill even when
> I
> have tempdb space configured and it almost empty?
>
> This report and the other handful of reports at least from the OS side show
> the disk i/o goes to high 90s% for Informix. Also response time and all
> other
> indications on the server itself show a slowing due to Informix taking all
> disk i/o.
>
> If I go into OAT while the reports are running and look at storage, rootdb
> space will slowly get measureable "other" chuck of space used (20%) and
> index/data will fluctuate a little but seem stable. If I look at the three
> temp spaces it goes from ~100% free to 10-20% used. Everything looks
> normal,
> or at least nothing unusual.
>
> I can't remember what else I looked at in OAT but nothing stood out, from
> an
> OAT perspective Informix was running great.
>
> Question 2: Before we test one of these reports again, any suggestions of
> what
> I need to verify in my configuration? Or setup of Informix?
>
> Question 3: Ok the next time we test one of these reports what OS commands,
> Informix commands or sql should I be running to find what is truly going
> on?
>
> John Adamski
> Sr. Network Specialist
> Graceland University
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

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