See page 31 in this document: https://www.ibm.com/.../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
