>>An unused unit of storage must be examined, determined >>that it is unused and actions (statistics) are taken >>for unused storage. If this storage is just not there, >>less activity is needed. > >But there should be less paging and hence reduced paging overhead. >
There's over allocating and then there is OVER ALLOCATING. This isn't your father's MVS. 64-bit is a big place and changes have been made to how storage is managed - some of which has caused overhead issues. In z/OS 1.8 you can have up to 4TB on a z/OS image - prior to that the maximum was 128GB. Will it matter if you allocate 10GB instead of 8GB... no, but just because your new z9 came with a bunch of extra storage doesn't mean you should give your non-paging 8GB LPAR 30GB. Especially if you are in a shop that likes to run your CECs at or near 100% all the time. Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - GITO mailto:[EMAIL PROTECTED] z/OS and OS390 expert at http://searchDataCenter.com/ateExperts/ Systems Programming expert at http://expertanswercenter.techtarget.com/ Mark's MVS Utilities: http://home.flash.net/~mzelden/mvsutil.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
