Chr. Have you done some paper and pencil storage estimates On a LPAR assume 2 gig for each of Z/os OMVS Each DB2 subsystem Each IMS subsystem Each MQ subsystem Each CICS subsystem 5 Batch address spaces 20 TSO users
If you have 14 gig available to an LPAR and one each of the above items you may be ok but are pushing it. Where did these numbers come from? For the subsystems, each has been hit by a long history of VSCR problems from early 'MVS' releases and in the case of IMS and CICS from earlier OS releases. All these products have aggressivly expanded both vertically (using more storage in the address space) and horozontally (using more address spaces) It is reasonable to assume that in the world of 64 bit addressing and a multi node sysplex these subsystems would of been pushing the limit of 31 bit environments ... Hence 2 gig each. Of course for a cost exceeding the total price of the memory you could and should do a more complex study if your procedures and / or protocalls call for it. On Tue, 27 Dec 2005 03:25:34 -0600, DMR-Qualitas Outsourcing <[EMAIL PROTECTED]> wrote: >Hello Mark, > >of course, to meet SLAs is the first and last break point! But... in our >production sysplex we have installed between 14Gb to 27Gb and we think >that, maybe, it's too bigger. > >This sysplex (7 "normal" systems + 2 GDPS) have IMS, DB2 and MQ. > >Regards >Chr. > >---------------------------------------------------------------------- >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
