Jousma, David wrote: >Hope everyone had a good holiday.
What holiday? I don't see any holiday! ;-D ;-D ;-D ;-D >Today we have a roughly 36GB of LOCAL page for each system, that was setup in >2006 spread across 4 mod-9's. Back then we didn't have the amount of memory >on the processors that we have now, nor did we have DB2's using data above the >bar. Most of the systems in our sysplex have around 40Gb of memory >configured online. We have many more DB2 V10 instances active now than we >did in 2006. Without doing a lot of math and measurements, I'm leaning >towards giving each system between 80 and 100Gb's of local page spread across >4 LOCAL page datasets for each system? We have dynamic PAV's enabled. That >would be 3-4 mod27's each. I could go with mod-54's, at 2 per system, but not >really sure how much the actual number of virtual DASD devices even matters >anymore? I think, you should say WHY are you asking? Performance issue? Response time? Batch jobs doing 'query from hell'? Workload issue? Other jobs / subsystems grabbing all memory? Anything else? Just please define your 'system'. DB2 [sub] system or LPAR system? SysPlex? For myself, I would go for 4 local page datasets distributed on at least two different control units for DASD. Just try to spread your paging out on more devices if you can do that. I would increase your number 4 to 8 or more if that is possible in your environment. I'm just begging one or three questions: What is your DB2 priority in WLM? Do you have any response time problems? What is your LPAR / LPARS CPU/Memory limits? This could probably raised and thus eliminate your paging problem? >Just trying to do the right thing. Probably not. ;-D It is really difficult to try to help you. I think you should post your actual problem you're trying to solve. Groete / Greetings Elardus Engelbrecht ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
