RE: system is loosing disk space at extraordinary rate

We've had similar situations when the WRKSYSSTS screen showed the
'Current unprotect used' as being way too big.  This happened to us back
on V4R4, and even at V5R1 (just once, an application query was the cause
and when cancelled returned all the temp space).  Back at V4R4, we had
to apply several PTFs for a 'memory leak'.  Sorry, but I don't remember
the details.  This 'bug' isn't as rare as you might have thought.

The best way I've found to identify if one of the active jobs is using
too much temp space is to use WRKJOB, then option 3 (Display Job Run
Attributes), and look at the 'Temporary storage used'  amount.  If you
have hundreds or even thousands of jobs running (we do), this could be
difficult. Another technique might be to use WRKACTJOB, then sort by CPU
% or one of the I/O columns to try to narrow down the jobs to look at.

HTH,
Glenn Birnbaum


-----Original Message-----
From: Philipp Rusch [mailto:Philipp.Rusch@rusch-edv.de]
Sent: Friday, March 29, 2002 11:05 AM
To: Midrange List
Subject: system is loosing disk space at extraordinary rate


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

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