Re: Health CHECK(IBMVSM,VSM_PVT_LIMIT)/VSM_SQA_THRESHOLD
- From: steven_conway@xxxxxxxxxxxxxx (Steven Conway)
- Date: 28 Sep 2007 04:54:12 -0700
Barbara's complaint is noted, but does not apply across every shop, of
course.
When we went to z/OS 1.7 last year, we increased ECSA. No problem on our
test systems, where 1.7 lived for months of testing before migrating. All
was well, until we got to Prod. Suddenly a problem surfaced that had not
been uncovered in Test. If three very large CICS trans all ran at the
same time, they ate all of EPVT and then Bad Things Happened. No good
warning or error messages from the applications, of course.
Seems the transactions had been tested one at a time by the applications
group in the Testplex, and declared good. I wasn't here yet when my
colleague had changed the parameters as he installed 1.7, and the changes
had been made in Parmlib so long before they'd been kinda forgotten.
Health Checker's warning of the change in EPVT size was a great help.
I don't mean to take anything away from Barbara's point that this thing
could be easier to administer. I'm a little nuts, but not crazy enough to
hint this product is anything but user-surly.
Cheers,,,Steve
Steve Conway
Lead Systems Programmer
Information Systems & Services Division
Computer & Network Operations
Phone: (703) 450-3156
Fax: (703) 450-3197
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