Hi John, You might consider changing modifying your stance when it comes to the z13 processors. Although the z13 actually has a slower chip, the processor is faster (partly) because of how they utilize memory. In the z13, IBM has lowered the price of storage so that you can get about three times the amount of storage for the same price as you're spending today. And, in fact, when going to the z13, you should consider doing exactly that! Get triple the memory you're using today (for the same price). The CPU savings will definitely be worth it.
I agree with Barry's statement about memory (yes, John, you remembered correctly). And if you study how IBM runs their benchmarks, their results are obtained by running the models with no constraints, such as no paging. So if you want to get similar results, it's worth getting enough memory so that there are no constraints. Best regards, Cheryl Cheryl Watson Watson & Walker, Inc. 100 Central Ave, Suite 1013 Sarasota, FL 34236 P-941-924-6565, F-941-924-4892 www.watsonwalker.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of John McKown Sent: Thursday, August 6, 2015 3:49 PM To: [email protected] Subject: Re: Limit number of frames of real storage per job Well, I can disagree with that on a practical level to some extent. Upgrading memory can sometimes, cost wise, be more like needing so much more electric power that the power company needs to run a higher capacity line to your business and you must then install better / new equipment to support it. It might be cheaper to just find out how to decrease your power (memory) requirements. Perhaps by doing something differently. And I shudder to think what would happen here if every toilet were flushed at the same instant. On Thu, Aug 6, 2015 at 1:58 PM, John Mattson <[email protected]> wrote: > As I remember from Barry Merrill... memory should be treated like > electricity or plumbing. You should never run out. To put it another > way, if you are doing physical paging, buy more memory. It is cheap by > comparison to the I/O and cycles needed for physical paging. (Hopefully > this has not changed since the last time I was luck enough to hear > Barry speak, and hopefully I paraphrased him correctly.) > > -- Schrodinger's backup: The condition of any backup is unknown until a restore is attempted. Yoda of Borg, we are. Futile, resistance is, yes. Assimilated, you will be. He's about as useful as a wax frying pan. 10 to the 12th power microphones = 1 Megaphone Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
