The IEFUSI exit can override region size/limit specifications. The question is whether OP actually has one and if so what it's doing. Many (most?) shops run SMF exits that report actual storage allocations at step end. That little report can be very useful in determining the outcome of storage requests. When REGION=0(K/M) was introduced eons ago, the idea was that it gave a task all available storage whether or not that was a good idea. As others have posted, that seems not be true these days. (Surprise to me.)
Also the actual effect of NOLIMIT is not so simple. There is a limit on each individual GETMAIN and a limit on all cumulative GETMAINs. Beats me how it all works. . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-543-6132 Office ⇐=== NEW robin...@sce.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Nims,Alva John (Al) Sent: Wednesday, January 04, 2017 1:25 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: (External):Re: REGION=0 From the MVS JCL Reference for z/OS 1.13: "Two installation exits, IEFUSI and IEALIMIT, can also affect the size of the user address space assigned to the job step." Are one or both of these exits in use at your site? I think you can code 0M, but the exit will change that value and you may not see that it was changed. Al Nims Systems Admin/Programmer 3 UFIT University of Florida (352) 273-1298 -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Frank Swarbrick Sent: Wednesday, January 04, 2017 3:58 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: REGION=0 Can you explain that? I thought REGION=0M (or 0K) allowed you to allocate storage up to "whatever is available" (or something like that). ________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of Jerry Whitteridge <jerry.whitteri...@safeway.com> Sent: Wednesday, January 4, 2017 11:39 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: EXTERNAL: Re: SHOWMVS ASMA972U Error Also consider that REGION=0M gives you all storage below the line and 32M above the line. You may want to specify a larger region size and see if that helps. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
