On Thu, 21 Feb 2008 13:04:31 -0600, Wayne Bell <[EMAIL PROTECTED]> wrote:
>Hello, > >Since we have migrated to z/OS V1.9 from V1.7 (Including, of course, the new >Storage Management algorithms), the counts for Blocked Paging in both the >SMF Type 30 and RMF Type 71 records have been virtually reduced to zero >while the Demand Paging Rate has remained similar to what is was in V1.7. > >Two questions, please: >1) Is block paging still the concept of gathering multiple pages in Central >Storage and writing them out to Auxiliary Storage with one I/O? It was >mentioned to me that this concept is obsolete. > >2) Has anyone else seen these counts go to zero? If so, do you know why >and/or how to get Blocked Paging turned back on? > z/OS 1.8 changed a lot of things in this area. Page replacement, UIC calculation and updating, no more physical swaps of ASIDs to AUX storage to name a few. So I'm not surprised you don't see blocked paging without the physical swaps. If you are a share member, pick up a copy of session 2828 from Tampa: 2828 - z/OS Internals: Real Storage Manager - Functions and Performance Mark -- Mark Zelden Sr. Software and Systems Architect - z/OS Team Lead Zurich North America / Farmers Insurance Group - ZFUS G-ITO mailto:[EMAIL PROTECTED] z/OS 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
