Re: system is loosing disk space at extraordinary rate

[Philipp Rusch <Philipp.Rusch@xxxxxxxxxxxx>]

Memory leak in V4R5 ?

A short summary of what we already investigated:

- we controlled spool files / outqueues: there are few files (some hundred, not 
unnormal amount
for a system of this size)
- we are not using Save While Active (SWA), neither in our own jobs, nor on
the commercial packages we use.
- we don't do SQL (this was the one with the big index files)
- we dont't do TCPIP over SNA controllers, we only have one 5494 doing native 
SNA
- we dont't see high I/O activity on the system
- we don't see jobs "abusing" the system with high percentages of CPU capacity
- we are running a scheduled RTVDSKINF in the morning (6.00) and in the evening 
(19.00)
to be able to compare %temporary used against the values of the snapshots before
Results so far:
- the nightjobs don't "eat" disk, seems to be no backup issue, then
- even if only some users (under ten) are using the system (its easter holidays 
in germany)
it eats memory at a significant rate (200 MB during a day)
- we have intensive use of IFS-directories for temporary storage of bitmap 
files that are
being merged into print jobs on the PC that triggers this job, could this be 
the culprit ?

Thanks everybody for your tips so far,
Philipp Rusch

Philipp Rusch schrieb:

> 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
>