Hi Clark,
Check the IBM doc of course for the definitive documentation. We found
that we needed to make the CHIN non-swappable as well in order to
protect it from being swapped out shortly after IPL when all subsystems
were coming up at once or when we were doing large scale subsystem
recycles. MQ doesn't use a lot of resources but needs to provide timely
response to requests passing through between clients and CICS so we run
it as an IMP 1 workload with a healthy velocity 65 (some will say too
high works well for us).
PPT PGMNAME(CSQYASCP)
CANCEL
KEY(7)
NOSWAP
NOPRIV
DSI
PASS
SYST
AFF(NONE)
NOPREF
PPT PGMNAME(CSQXJST)
CANCEL
KEY(8)
NOSWAP
Best Regards,
Sam Knutson, GEICO
Performance and Availability Management
mailto:[EMAIL PROTECTED]
(office) 301.986.3574
Sattinger's Law: It works better if you plug it in.
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Clark Lowery
Sent: Tuesday, May 16, 2006 8:22 AM
To: IBM-MAIN@BAMA.UA.EDU
Subject: MQ priority settings in z/os
We have recently seen overall system slowdowns while application
programs wait on an MQ response to a PUT or GET. When this occurs, we
also see high CPU delays in the MQ MSTR and CHIN.
We run high-volume (1200 tran/sec) transactions through a CTG/CICS/DB2
structure, and are debating how the MQ priority should be set. Should it
be the same as the CICS AORs that are issuing the calls?
Any hints will be appreciated!
Clark
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