Re: system is loosing disk space at extraordinary rate

[Martin Rowe <martin@xxxxxxxxxx>]

On Friday 29 March 2002 7:04 pm, Philipp Rusch wrote:
> Hello all,
> this is a strange one:
> I did a release upgrade on a V4R4 machine (a 720) to V4R5 in november
> last year. We were at about 50% used disk space at that time. PTF
> package C0198450 was installed at that date as well, everything went
> fine.
> Since we did not do any further IPLs since then, we someday noticed
> that something is eating up disk space, until we reached 92 % last
> week.
> Searching for the culprit was at no avail, we ended every user jobs,
> ended every non-system job on the system, it eats space on and on. A
> short calculation led us to round about 300 MB (!) temporary space
> which is used up every day since november. WRKSYSSTS showed 29 GB of
> temp used space out of 77 GB total, this is 38 % of the whole system !
> When we scheduled an IPL to get rid of the temporary used space, I did
> endsbs *all *immed at first hand and suddenly all our used disk space
> was free again ! You could watch it coming back available when pressing
> F5 in wrkssysts display. I never saw this behaviour on an AS/400
> before. IBM support was nearly as helpless as we, we ordered some PTFs
> that might help ...
>
> Any hints anybody ?
>
> Have a nice easter weekend,
> regards from germany, Philipp Rusch

Hi Philipp

The only similar thing we've seen is with either user queries that have
run amok or batch jobs servicing PC clients (SQL requests from the likes
of Impromptu) that seem to create monstrous indexes grabbing up to 30Gb
of temporary storage. They don''t always show as high CPU usage jobs so
are difficult to spot. I ended up writing a routine to list jobs with
temporary storage over a 50Mb threshold, and that indentifies them fairly
quickly. Can't remember which of the job APIs it uses now, but I can post
the code on Tuesday when I'm back at work - it might point you in the
right direction.

Regards, Martin
--
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