Where did you find the NUCLABEL ENABLE(IGVGPVTN) parameter? I don't see that in any 1.10 document.
Jon L. Veilleux [EMAIL PROTECTED] (860) 636-2683 -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Edward Jaffe Sent: Friday, November 21, 2008 1:21 PM To: [email protected] Subject: Re: z/OS upgrade Tom Harper wrote: > If you are trying to infer a difference in GETMAIN behavior here, this > test does not do that. I'm fairly certain that in the 1.10 case, the > storage was obtained from an existing page, and thus was not cleared. > > Depending on the storage layout, this could happen in 1.9 as well. If > you change the test to do two GETMAINs, alter the storage to > non-zeroes in the second area, do a FREEMAIN, and they re-obtain the > same amount of storage again, I think you would see that it is not > cleared in 1.9 either. > Also, don't forget that GETMAIN/STORAGE behavior was drastically changed in z/OS 1.10. Specifically, allocation of virtual storage described by DQEs for low private is now done from the bottom up, instead of top down. And, if two logically-adjacent DQEs describe adjacent storage areas, they are merged. The old (pre z/OS 1.10) behavior can be reinstated by setting the following in DIAGxx: NUCLABEL ENABLE(IGVGPVTN) -- Edward E Jaffe Phoenix Software International, Inc 5200 W Century Blvd, Suite 800 Los Angeles, CA 90045 310-338-0400 x318 [EMAIL PROTECTED] http://www.phoenixsoftware.com/ ---------------------------------------------------------------------- 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 This e-mail may contain confidential or privileged information. If you think you have received this e-mail in error, please advise the sender by reply e-mail and then delete this e-mail immediately. Thank you. Aetna ---------------------------------------------------------------------- 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
