On Fri, May 31, 2019 at 9:30 AM Jim Mulder <[email protected]> wrote:
> See page 31 in this document: > > https://www.ibm.com/.../IBMzSystemsProcessorOptimizationPrimerv2.pdf > I got a 404 on that page. What is supposed to be in the /.../ portion? That link, for me in Gmail, is actually "/.../" But I got the pdf here: https://www.ibm.com/developerworks/community/files/form/anonymous/api/library/ff4563be-756e-49bf-9de9-6a04a08026f1/document/07c69512-ac74-4394-87b9-a61ea201347e/media/IBMzSystemsProcessorOptimizationPrimerv2.pdf > > Whether use of the near-memory engine helps or hurts your performance > depends on how/when you were using the storage before the MVCL/MVCLE, and > how/when you use it after the MVCL/MVCLE. > > Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. > Poughkeepsie NY > > "IBM Mainframe Discussion List" <[email protected]> wrote on > 05/30/2019 11:12:13 PM: > > > From: "Michael Hochee" <[email protected]> > > To: [email protected] > > Date: 05/31/2019 12:31 AM > > Subject: BNDRY=PAGE possible CPU hit? > > Sent by: "IBM Mainframe Discussion List" <[email protected]> > > > > Hi, > > I recently added the BNDRY=PAGE parameter to a set of STORAGE > > OBTAINS which acquire storage areas of various sizes from several > > low private subpools. My intent was a reduction of CPU used by > > subsequent MVCLE instructions, as ADM would more likely be employed > > for MVCLE executes, since the storage areas involved were page > > aligned (apparently an ADM pre-req.) Unfortunately my initial > > testing revealed a significant increase in CPU consumption, rather > > than a reduction. > > > > I did a few searches of the IBM-MAIN archive and found nothing > > involving increased CPU overhead resulting from BNDRY=PAGE usage. > > Any thoughts on what might be causing the elevated CPU? Again, the > > only change made was adding BNDRY=PAGE. (I have since backed the > > change off, tested, reapplied the change and tested with the same > results) > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- This is clearly another case of too many mad scientists, and not enough hunchbacks. Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
