> Could additional potential CPU efficiencies be gained from creating the > memory objects with 1Mb large pages (or 2Gb if they are REALLY big!)?
1Mb pages can reduce the number of TLB misses, along with the cache effects of fetching the DAT table entries to resolve the TLB misses. Keep in mind that z/OS pages out 1Mb pages to Flash memory only (and not to page data sets), so 1Mb pages are pageable only if you have an EC12 processor with Flash memory. PAGEFRAMESIZE=1M can be specified on DSPSERV CREATE on z/OS 2.1, or z/OS 1.13 with the RSM Web-deliverable for Flash memory support installed. Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
