Points we shared and learnt. Thanks to all for this knowledge share. 1. CP is kneecapped and expensive. Linux will run faster on IFL. 2. CP and IFL's can be shared in single LPAR 3. Proper sizing of Memory, Paging, SRN resources. 4. If still high usage caused by Linux instance - adding additional IFL 5. No restriction to have more number of IFLs than CP. 6. Review the WAIT COMPLETION flag
I have a question.. In this case, Will it be helpful to implement IRD in the shared LPAR of CP and IFLs? Regrds, Suresh On Fri, Apr 5, 2013 at 4:29 AM, Peter Bishop <peter.bis...@eds.com> wrote: > Hi Tom, > > I've also seen 100% usage on a shared IFL used by an LPAR where the "WAIT > COMPLETION" flag was set, i.e. the box called "Do not end the time slice if > a partition enters a wait state" was ticked. Kind of defeats the purpose > of shared PUs, but something to be aware of nonetheless. Later we turned > off the flag and the usage was more evident in SYSVIEW, i.e. not 100% all > the time. > > thx > Peter Bishop > > On Thu, 4 Apr 2013 11:02:30 -0500, Barry Merrill <ba...@mxg.com> wrote: > > >What data is 100% busy??? > > > >If you are using RMF PR/SM data, MXG TYPE70PR, and > >the IFLs are Dedicated, they are always reported > >as 100% busy in RMF 70 data, and z/VM MONWRITE data > >must be used to report true utilization of the IFS. > > > >SHARED IFL's utilization IS reported in TYPE70 data; > >you can see a comparison of RMF 70 IFL utilization > >with MONWRITE utilization for SHARED IFLs in > >MXG Technical Newsletter FIFTY-EIGHT > >at www.mxg.com/newsltrs. > > > > > >Barry > > > > > >Herbert W. Barry Merrill, PhD > >President-Programmer > >Merrill Consultants > >MXG Software > >10717 Cromwell Drive > >Dallas, TX 75229-5112 > >214 351 1966 tel > >214 350 3694 fax > >http://www.mxg.com > >ba...@mxg.com > > > >MXG Support: supp...@mxg.com > >MXG Admin: ad...@mxg.com > > > >Standard Answers: http://www.mxg.com/administration > >What's Supported: http://www.mxg.com/changes > > > > > > >-----Original Message----- > >From: Tom Marchant [mailto:m42tom-ibmm...@yahoo.com] > >Sent: Thursday, April 04, 2013 9:56 AM > >To: IBM-MAIN@LISTSERV.UA.EDU > >Subject: Re: Question concerning Z/VM, Linux and General Processors > > > --snip > >High CPU usage in the IFL? > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- *SureshNc* ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
