Bernd Oppolzer wrote: > 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.
It has been a few years since I was intimately involved with this stuff, but as I recall subpool 1 is used for LE's internal structures (CAA, etc.), and subpool 2 is used for program heap and stack. Regards, Henry ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
