Kris, Thanks, but this is for a new workload. The z/VM system is up, but there's nothing running on it, yet. We're planning on a 3:1 ratio of logical/physical memory.
Dennis "I always remind people from outside our state that there's plenty of room for all Alaska's animals -- right next to the mashed potatoes." -- Sarah Palin From: The IBM z/VM Operating System [mailto:[email protected]] On Behalf Of Kris Buelens Sent: Tuesday, December 01, 2009 12:58 To: [email protected] Subject: Re: [IBMVM] 3390-9's for paging Just have a look at how busy your current page packs are today. Then we can predict something. (eg if you hardly ever page, you will not notice a difference) 2009/12/1 O'Brien, Dennis L <dennis.l.o'[email protected] <mailto:dennis.l.o%[email protected]> > Our storage architect is trying to get us to use 3390-9's instead of 3390-3's for paging. I know that z/VM doesn't use PAV or HyperPAV for paging, and that more devices means more concurrent I/O's. Has anyone actually tried changing from 3390-3's to one-third as many 3390-9's? If you have, was there a measurable difference in performance? Dennis "I always remind people from outside our state that there's plenty of room for all Alaska's animals -- right next to the mashed potatoes." -- Sarah Palin -- Kris Buelens, IBM Belgium, VM customer support
