Thanks Bill Thank You,
Terry Martin Lockheed Martin - Citic z/OS and z/VM Performance Tuning and Operating Systems Support Office - 443 348-2102 Cell - 443 632-4191 -----Original Message----- From: The IBM z/VM Operating System [mailto:[email protected]] On Behalf Of Bill Holder Sent: Tuesday, October 12, 2010 3:38 PM To: [email protected] Subject: Re: Max REAL STORAGE for z/VM LPAR Hi Terry - well paging delays could be a different set of issues, though adding more memory may well be the right response. Depending on the specifics, other possible responses might also include increasing your paging bandwidth or adding expanded storage, but memory does seem the most obvious. It's impossible to say without knowing the details - this is definitely the sort of case where Bill Bitner's favorite saying ("It Depends") applies. If you are experiencing current problems, you can always call it in. Being more of a designer / coder than a performance analyst / tuner, myself, I hate to try to give general advice without knowing specifics, and this isn't really the best place to have that detailed discussion. All that said, if increasing your memory within the supported range introduces any new problems, certainly let us know through normal support channels. - Bill Holder, z/VM Development, IBM Endicott On Mon, 11 Oct 2010 19:22:55 -0400, Martin, Terry R. (CMS/CTR) (CTR) <[email protected]> wrote: >Thanks Bill. I will say that I am in fact seeing some of the same issue s that you mention as possible issues when running above the memory limit i n my current configuration at 130G. > >Most of this is due to our major over commit ratio hence paging delays f or us. So my hope was to reduce the over commit by adding more real memory, but I am starting to get concerned now doing this. I don't what else to do to relieve this other than adding more memory. What is your thought, should I be worried ? > >Thank You, > >Terry Martin >Lockheed Martin - Citic >z/OS and z/VM Performance Tuning and Operating Systems Support >Office - 443 348-2102 >Cell - 443 632-4191 >
