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IDS Forum

Re: oncheck -pe ....... ?

Posted By: Martin Fuerderer
Date: Friday, 14 October 2011, at 10:22 a.m.

In Response To: Re: oncheck -pe ....... ? (Alexandre Marini)

Hi,

the "oncheck -pe" command needs to do some sorting.
This can be the temporary table that you see in the
output of the command. Of course, after the "oncheck -pe"
has finished, that temporary table will disappear. That
should explain, why you can't find it afterwards.

I'm not sure, whether such a temp table is always
created for the sorting done by "oncheck -pe", or
whether it is done only under certain circumstances
(e.g. sort memory space a bit insufficient and things
spilling to disk).

To confirm my theory you could try to run the oncheck
command with PSORT_DBTEMP set to a file name
in your file system. That way any spilling should occur
into that file (rather than a temp table). At least that's
how it used to work ... :) If things are like this, then you
should no longer see this temp table object in the listing
of "oncheck -pe".

Of course it could well have been any other temp table
that just happened to exist at the time you ran the
"oncheck -pe". But in that case I would suspect, that
repeated executions of "oncheck -pe" will not show
this temp table - at least not every time (in case there's
an application running that every now and then creates
this thing).

Regards, Martin
--
Martin Fuerderer
IBM Informix Development Munich, Germany
Information Management

Read about the Informix Warehouse Accelerator:
http://tinyurl.com/the-iwa-blog

IBM Deutschland Research & Development GmbH
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Reg.-Gericht: Amtsgericht Stuttgart, HRB 243294

ids-bounces@iiug.org wrote on 10/14/2011 03:50:33 PM:
>
> Hello.
> I think it´s some temporary table created.
> You could use this query to investigate the issue:
> -------------------------------------------
> database sysmaster;
> SELECT trim(n.dbsname),
>
> trim(n.owner),
>
> trim(n.tabname),
>
> COUNT(*),
>
> SUM(i.ti_nptotal) as pages,
>
> SUM(i.ti_nrows) as rows
>
> FROM systabnames n, systabinfo i
> WHERE (BITVAL(i.ti_flags, "0x0020") = 1
>
> OR BITVAL(i.ti_flags, "0x0040") = 1)
>
> AND i.ti_partnum = n.partnum
> group by 1,2,3
> ORDER BY 5 DESC
> -----------------------------------------
> (just put your tabname column, or partnum value, and see if it´s shown
ok?)
>
> Regards.
>
> Em 14/10/2011 05:24, Dirk Cornel.... escreveu:
> > Ok, here is something that I don't understand (lack of knowledge), so
I need
> > to ask the gurus.
> >
> > The following link says -
> >
> >
> >
>
http://publib.boulder.ibm.com/infocenter/idshelp/v115/index.jsp?topic=%2Fcom.ibm.admin.doc%2Fids_admin_0626.htm

> >
> > The following information is displayed:
> >
> > * The name, owner, and creation date of the dbspace
> > * The size in pages of the chunk, the number of pages used, and the
number
> of
> > pages free
> > * A listing of all the *TABLES* in the chunk, with the initial page
number
> and
> > the length of the table in pages
> >
> > The *TABLES* within a chunk are listed sequentially. This output is
useful
> for
> > determining chunk fragmentation. If the database server is unable to
> allocate
> > an extent in a chunk despite an adequate number of free pages, the
chunk
> might
> > be badly fragmented.
> >
> > When I run an oncheck -pe, one of the lines I get is:
> >
> > Database:'owner".tmp_psh_psd_idx1 6613710 4
> >
> > And this is where my problem starts. I cannot find this "object". The
manual
> > says it should be a table, but it is not in systables. I also cannot
find it
> > under fragmented tables.
> > The naming convention makes it look like and index, so I thought, ok,
let me
> > also check the indexes - nothing.
> >
> > So eventually I ran a full dbschema (dbschema -d databasename -ss>
filename;
> > grep tmp_psh_psd_idx1 filename) ..... nothing.
> >
> > What is this object ?
> >
> > Dirk
> >
> > NOTE: This e-mail message is subject to the MTN Group disclaimer see
> > http://www.mtn.co.za/SUPPORT/LEGAL/Pages/EmailDisclaimer.aspx
> >
> >
> >
>
*******************************************************************************

> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
> >
>
> --
>
> Alexandre Marini
>
> Tecnologia da Informação - DBA
>
> SEFAZ-MS / SGI-UGSR / Sistemas IBM-Informix
>
> <Cert-Info-Mgmt_color.jpg>
>
> IBM Certified System Administrator - Informix Dynamic Server V10 / V11 /

> V11.70
>
> IBM Information Management Informix Technical Professional v3
>
>
>
*******************************************************************************

> Forum Note: Use "Reply" to post a response in the discussion forum.
>

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