Don, Then should I see that MVS % Busy in LPAR mode is "different" to the accurate measure you get in Basic Mode or with Dedicated PIP :)
Useful, but still wrong - like Device Busy with PAV. Ron > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On > Behalf Of Don Deese > Sent: Wednesday, 15 February 2006 3:53 AM > To: [email protected] > Subject: Re: LPAR utilization more important than MVS utilization? > > That depends on what your definition of "wrong" is. > > MVS Busy is the time a logical processor was dispatched on a physical > processor, plus the time that PR/SM intercepted the logical processor > because it had exceeded its dispatch interval and it was on the PR/SM > Logical Processor Ready Queue awaiting re-dispatch. The difference > between > MVS Busy and CPU Busy is a result of over-commitment of logical processors > to physical processors and a high processor demand relative to CPC share > for the LPAR. > > If a logical processor voluntary gives up the processor because it is > waiting (e.g., wait for I/O), then wait time is indeed accumulated (see > SMF70WST, which is valid with z/OS V1R3 on z/Architecture). > > With z/OS on z/Architecture (after z/OS V1R3 when the values were > corrected), you can calculate (1) logical processor dispatched to physical > processor, (2) logical processor in wait state, (3) logical processor on > Logical Processor Ready Queue from Intercept, and (4) logical processor on > Logical Processor Ready Queue recovering from wait. All four values are > useful in analyzing PR/SM activity, and analyzing LPAR busy and delays. > > Cheers, > > Don > > ****** > Don Deese, Computer Management Sciences, Inc. > Voice: (703) 922-7027 Fax: (703) 922-7305 > http://www.cpexpert.org > ****** > > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
