Hello John,
I have the copy of the z/OS 1.12 LE Vendor Interfaces book,
I've read the chapter about Storage management,
I found the routines that the heap manager uses to do the storage
allocations (for the primary and secondary extents) and I even saw
that they get the subpool number as a parameter, but still I didn't see
the information that I looked for (which MVS subpool is used for what
kind of heap allocation).
I'm so interested in this, because I see (for example) Subpool 2
growing during the day shift, and I want to know which kind of allocation
is responsible for that ... and why there is sometimes no Subpool 2 usage,
although there must be some heap usage ... and the storage report
(RPTSTG(ON)) indeed indicates it. I believe, that the primary heap
allocation
goes into subpool 1, and the secondary extents go to subpool 2, and I'd
prefer
to have a confirmation for this assumption in some IBM book.
Anyway, I can find it out looking at the areas in my running jobs -
and maybe this kind of information seems irrelevant to the LE people,
because they don't regard system related dumps and tools as adequate
to deal with LE related problems.
Another aspect can be: subpools seem to be OS-specific; there are
no subpools in VSE, as it seems, but LE is running there, too. So maybe
it is not appropriate to talk too much about subpools in a LE brochure.
Thank you, regards
Bernd
Am 13.09.2012 00:06, schrieb John Gilmore:
Bernd,
Look at
z/OS Language Environment Vendor Interfaces, SA22-7568-nn.
where nn is currently a z/OS level number - 1, so that SA22-7568-12 is
for z/OS 1.13, . . . , SA22-7568-11 is for z/OS 1.12.
You can of course download a copy from the IBM publications center.
John Gilmore, Ashland, MA 01721 - USA
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