On Mon, 6 Jan 2014 12:44:42 -0500, Rob Schramm <rob.schr...@gmail.com> wrote:
>Does it really matter as much as it used to? The amount of cache on a dasd >subsystem and overall i/o seems more relevant for paging spikes. Not that >i am advocating a complete dismissal of all the normal considerations.. >but since writes are done to cache.. isn't it the foremost attribute these >days? "Normal considerations" including page-ins in parallel with VIO and perhaps SVC dump capture. Cache will not relieve an I/O bottleneck even if you have 100GB of paging space, with 100GB of cache in front of it, with nothing else using that cache, if that 100GB is defined on 1 EAV. IOSQ can be a problem if paging datasets or volumes are too large and too few. Hence my emphasis on questioning page dataset and page volume counts, and follow up considerations for HiperPAV. I was more interested in the software view of paging configuration, but I am learning some interesting things about hardware along the way. Regards, Art Gutowski General Motors Corporation ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
