OA28998
Terry Traylor charlesSCHWAB TIS Mainframe Storage Management Remedy Queue: tis-hs-mstg (602) 977-5154 -----Original Message----- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Knutson, Sam Sent: Tuesday, May 19, 2009 2:48 PM To: IBM-MAIN@bama.ua.edu Subject: SMS migration concern 1.9 and 1.10 mixed level SMS translate, validate, activate on 1.9 caused storage leak in SMS leading to IPL Hi, Anyone know of an APAR for this or a documented migration action or existing toleration service? This tip was passed along from another account but I would expect this should have resulted in an APAR to prevent the storage exhaustion or one to prevent the activation in a mixed complex. I have not yet located anything. ======================================================== If your customer is running a JESplex with mixed levels of z/OS 1.9 and 1.10, be sure they understand that they need to do a translate, validate, activate of their DFSMS ACDS on a 1.10 system before using it there. Two fields have been added in 1.10, and if they use a 1.9-level ACDS on a 1.10 system, it will GETMAIN the size that 1.10 thinks it should be, but when done it will FREEMAIN only the size that it was in 1.9. This means that a x'30' byte fragment of storage will remain allocated, causing the entire block to be unusable. (The eyecatchers in that storage are the names of the two new fields.) After enough SMS activity, these fragmented blocks will accumulate in the SMS address space's extended private area to force subsequent GETMAINs to look below the line, where it will proceed to fragment storage there as well, resulting in S878 abends on further such SMS GETMAINs, forcing a refresh of the SMS address space (FORCE SMS,ARM) or an IPL. After properly activating the ACDS on the 1.10 system, further fragmentation will cease. They can use the 1.10-level ACDS on 1.9 LPARs although there will be a warning message issued. ======================================================== Best Regards, Sam Knutson, GEICO System z Performance and Availability Management mailto:sknut...@geico.com (office) 301.986.3574 (cell) 301.996.1318 "Think big, act bold, start simple, grow fast..." ==================== This email/fax message is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution of this email/fax is prohibited. If you are not the intended recipient, please destroy all paper and electronic copies of the original message. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu 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 lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
