I can concur on this. I also called IBM TSM on zOS support, back a while
ago, about performance issues.
He told me the default "maxquick" value is 4% of allocated/available
REGION. For us, we bumped it to 20M. He also said there is a usermod
that will "zap" TSM to make it default to 10% (or something like that) !
Stefan Holzwarth <[EMAIL PROTECTED]>
Sent by: "ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
04/27/2004 03:09 AM
Please respond to
"ADSM: Dist Stor Manager" <[EMAIL PROTECTED]>
To
[EMAIL PROTECTED]
cc
Subject
Internal Memory Managment TSM @MVS
Hi,
3 month ago i read about PMR92547, that describes performance-problems
coming from a too small internal memorypool
Since we had speedproblems we doubled that pool size and after 3 month i
believe it was a good step forward.
With show memu you can have a look at the current settings (should be done
after some uptime)
MAX initial storage 1073741824 (1024.0 MB)
Freeheld bytes 45106900 (43.0 MB) <- this is needed
by
the TSM Server
MaxQuickFree bytes 52682955 (50.2 MB) <- this should be always
greater than freeheld
51 Page buffers of 25724 : 194 buffers of 3215.
26 Large buffers of 1607 : 153 XLarge buffers of 200.
186666 buffers free: 257114 hiAlloc buffers: 70448 current buffers.
144822 units of 56 bytes hiAlloc: 58024 units of 56 bytes hiCur.
0000001 blocks, total 0002672, lgst 0002672 avg 0002672 by �0Cf?+
�+80000E08.
0000001 blocks, total 0000136, lgst 0000136 avg 0000136 by �0Cf?+
�+80000080.
0000001 blocks, total 0006652, lgst 0006652 avg 0006652 by �0Cf?+
�+80000078.
0000007 blocks, total 0001232, lgst 0000176 avg 0000176 by �0Cf?+
�+80000062.
0000669 blocks, total 0065147, lgst 0000285 avg 0000097 by �0Cf?+
�+800009DE.
with "Show Memu SET MAXQUICK 52682955" set the MaxQuickFree to about
50M
All at your own risk!
Kind regards,
Stefan Holzwarth
----------------------------------------------------------------------------
--
Stefan Holzwarth
ADAC e.V. (Informationsverarbeitung - Systemtechnik - Basisdienste)
Am Westpark 8, 81373 M�nchen, Tel.: (089) 7676-5212, Fax: (089) 76768924
mailto:[EMAIL PROTECTED]
