Gerhard, Now what if the searching you describe was a sequential scan of said table, and the LPAR had only 1GB of storage defined?
Ron -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Gerhard Adam Sent: Thursday, July 27, 2017 8:19 PM To: [email protected] Subject: Re: [IBM-MAIN] REGION=0M leads to CPU through the roof I don't see paging as the culprit. To page out 1.6 GB of memory and then reference it to bring it back in still indicates an application problem. Especially with a total elapsed time of only 12 minutes. I suspect that the application built a table. Spent wasted time searching it. Sent from my iPhone > On Jul 27, 2017, at 6:50 PM, Ron Hawkins <[email protected]> wrote: > > Charles, > > YES I AGREE, storage nowadays can do a lot of paging, and support a > CEC easily burning 11 minutes of CPU time paging. DPR rates of > 100,000/sec are a walk in the park for current IBM, EMC or HDs > controllers, and probably higher on a boxes that can do >2,000,000 cache hits a second. > > Of course, if the OP is not actually going to look at anything but the > CPU time, he will probably never find out what cause it. > > Ron > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] > On Behalf Of Charles Mills > Sent: Wednesday, July 26, 2017 5:37 PM > To: [email protected] > Subject: Re: [IBM-MAIN] REGION=0M leads to CPU through the roof > > By ELEVEN CPU MINUTES??? > > A modern processor can do a heck of a lot of paging with 11 CPU minutes. > > Charles > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] > On Behalf Of Ron Hawkins > Sent: Wednesday, July 26, 2017 5:08 PM > To: [email protected] > Subject: Re: REGION=0M leads to CPU through the roof > > Richard, > > You used 1.6GB of virtual storage. > > How much paging did the address do? There's no free lunch, and page > faults will increase the TCB time for an address. > > ---------------------------------------------------------------------- > 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 ---------------------------------------------------------------------- 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
