In the course of trying to duplicate a customer problem, I have run across
unexpected behavior that I wonder if anyone can help to explain.
I have an application program (COBOL 4.2, z/OS 2.2, AMODE 31, RENT) that
exhibits the following:
When run with our *default* REGION (i.e. no REGION= on the EXEC whatsoever):
CPU: 0 HR 00 MIN 31.34 SEC SRB: 0 HR 00 MIN 00.06 SEC
VIRT: 1056K SYS: 276K EXT: 32740K SYS: 13116K
ATB- REAL: 8K SLOTS: 0K
VIRT- ALLOC: 10M SHRD: 0M
When run with an explicit REGION=0M:
CPU: 0 HR 11 MIN 38.43 SEC SRB: 0 HR 00 MIN 00.07 SEC
VIRT: 7856K SYS: 276K EXT: 1622548K SYS: 13116K
ATB- REAL: 8K SLOTS: 0K
VIRT- ALLOC: 10M SHRD: 0M
You'll note the large increase in storage - which is of course not surprising -
but more interesting (and unwelcome) to me is that the CPU time required
increased by roughly a factor of 22X to do the exact same work. (The ONLY
difference between the two runs is the addition of REGION=0M to the EXEC.)
Can anyone suggest what I should be thinking about here in terms of possible
causes? Is it possible that so much "overhead" is needed to manage the much
larger memory space? Could it be something to do with LE tuning?
Thanks,
Richard Way
HPE Security - Data Security
HPE Software | Enterprise Security Products
+1 408 857 0216 Mobile
1140 Enterprise Way, Mail Stop 3048
Sunnyvale, CA 94089
[HPE logo]<http://www.hpe.com/>
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