Agree. Even RMF II is going to tell you more than you can see from step end messages.
-----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Rob Schramm Sent: Friday, July 28, 2017 2:51 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: [IBM-MAIN] REGION=0M leads to CPU through the roof Turn on a monitor while the step is running? With 12 min of CPU, there is time to dig into it. Rob On Fri, Jul 28, 2017, 4:10 AM Ron Hawkins <ronjhawk...@sbcglobal.net> wrote: > 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:IBM-MAIN@LISTSERV.UA.EDU] > On Behalf Of Gerhard Adam > Sent: Thursday, July 27, 2017 8:19 PM > To: IBM-MAIN@LISTSERV.UA.EDU > 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 <ronjhawk...@sbcglobal.net> > 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:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Charles Mills > > Sent: Wednesday, July 26, 2017 5:37 PM > > To: IBM-MAIN@LISTSERV.UA.EDU > > 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:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Ron Hawkins > > Sent: Wednesday, July 26, 2017 5:08 PM > > To: IBM-MAIN@LISTSERV.UA.EDU > > 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 lists...@listserv.ua.edu with the message: INFO > > IBM-MAIN > > > > -------------------------------------------------------------------- > > -- For IBM-MAIN subscribe / signoff / archive access instructions, > > send email to lists...@listserv.ua.edu with the message: INFO > > IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, send > email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- Rob Schramm ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
