Demand paging is anathema to multi-user address spaces (e.g. CICS/IMS). It is somewhat less problematic for single user address spaces. (TSO, BATCH) and in-between for DB2. e.g. it may be perfectly acceptable to have a demand paging rate of 100 if CICS/IMS demand paging is zero.
Side trip to the "old days". I recall demand paging rates in the multi-hundreds along with swaps in the 80's. That being said, much research has already been done in this area. CMG (www.cmg.org) papers from the 80's and 90's will have a wealth of information about paging and its impacts on various workloads. SHARE (www.share.org) papers of the same vintage will also contain much useful information. Paging is not, by itself, a bad thing. When it becomes bad, as Mark said, is when the phone starts ringing or SLA's are not being met. The answer to your original question " Can someone please help me determine what the 'acceptable paging should be on a system?" is "it depends". BTW, there are possibly other reasons for poor MQ and WAS performance unrelated to paging. HTH, ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
