Hi Lizette,
You didn't say COMPRESSED so if you are not you might try it. It takes
a little CPU but is well worth it give the size reduction for a typical
SVC dump. As an aside I think IBM plans some day to make some of the
enhancements to SVC dump that have already been incorporated in Stand
Alone dump to reduce the size and then it might be less effective but
for now it is quite an impressive reduction.
We already use MAXSPACE=00008000M on our large LPARs (32M) I expect I
will have to increase that again at some point.
The consideration for us is to have enough frames on the available frame
queue and a robust paging configuration to handle the demand from large
dumps or other spikes in memory use.
It has been said before but if you come up short and the processor model
you have supports it fight like anything to get them to buy memory. At
$10K/GIG or $8K/GIG on z9 it is the cheapest thing you can buy to
improve performance.
Best Regards,
Sam Knutson, GEICO
Performance and Availability Management
mailto:[EMAIL PROTECTED]
(office) 301.986.3574
"Think big, act bold, start simple, grow fast..."
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Lizette Koehler
Sent: Thursday, August 03, 2006 8:31 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: SVC Dumps and DB2
Does anyone know if there is a way to reduce the amount of information
DB2 feels it needs to dump when it requests an SVC Dump? We had
MAXSPACE set at 4500M and it still was not enough.
I do have the Dump Data sets SMS managed and STRIPPED (extended format)
so that part should not be a problem.
Or is there a way to calculate how much MAXSPACE will be needed by DB2?
Lizette
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