Lindy, With one minor (but important) exceptions, subpools 0-127 are user private, so the usage is defined by, and up to the programs running in the address space. These can be used by programs to coordinate the freeing of the subpool. The one exception that I mentioned is that TSO puts all of its user-related control blocks in subpool 78, so I would STRONGLY advise against using that subpool, as a subpool free of all the storage in SP=78 causes some un-expected problems with TSO. Additionally, as subpools are aligned on page boundaries, you can guarantee that storage in subpool 1 will not reside on the same page as subpool 2. To look at what is in subpools, the best method is the VSMLIST macro, or you can run the subpool chains from the LDA looking at the SPQE and data chained from it.
Wayne Driscoll Product Developer NOTE: All opinions are strictly my own. -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Lindy Mayfield Sent: Monday, August 18, 2008 10:24 AM To: [email protected] Subject: A couple of memory/storage questions Can someone tell me which documentation I should read to answer questions such as these? (I have been searching and found some cool stuff, but not this yet.) What are memory subpools 0-127 used for? In other words, are there any differences in which one of those I use? And if so what are they? I would like to map out the memory usage of an address space to know what subpools it is using, the number of bytes, addresses, that sort of thing. Which document has tells me what control blocks and so on that contains that info? Thanks in advance, Lindy ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
