John,
That's because MVS % Busy in LPAR mode is wrong.
MVS % Busy is the compliment of CPU Wait Time, as Wait Time is what is
actually captured.
MVS % Busy = 1-((interval-wait time)/interval)
In LPAR mode, if a Logical Processor is not dispatched by PR/SM then it does
not accumulate wait time even though it is actually waiting. This means that
MVS % Busy is greater than actual time that LP within the LPAR were
dispatched by PR/SM and busy.
LPAR busy is the right number, though a large difference between MVS % Busy
and LPAR busy is indication of a saturated LPAR.
Ron
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
> Behalf Of John Ticic
> Sent: Tuesday, 14 February 2006 10:04 PM
> To: IBM-MAIN@BAMA.UA.EDU
> Subject: LPAR utilization more important than MVS utilization?
>
> Greetings,
>
> I've noticed that RMF CPU reports favour showing LPAR utilization over MVS
> utilization.
>
> Let me give some examples. Also, I'm only considering LPAR mode on a z990.
>
> 1. SUMMARY(INT) summary report shows MVS %
>
> 2. REPORTS(CPU) is comprised of 3 parts (relevant here).
> a. shows MVS% and LPAR% for each active processor
> b. shows detailed CPC information. The detailed CPC information
> contains total LPAR% and physical CPU%
> c. LPAR cluster report showing LPAR%
>
> 3. PLOTS(CPU) plots LPAR% for each processor
>
> There are other reports that include the CPU in the header, but I'll just
> ignore those here.
>
> I realise that all 3 CPU measurements are important, but it seems to me
> that LPAR% is being portrayed as the important value to be keeping an eye
> on.
>
> Another example. When I look at RMF monitor 3 Workflow/exceptions, the
> CPU%
> indicated is the LPAR%, not the MVS% utilization. SYSINFO shows me the
> MVS%. CPC capacity only shows LPAR% and physical%.
>
> What do you people think? I am being too picky? I expected PLOTS(CPU) to
> be
> MVS% but was suprised to find it was LPAR%.
>
> Thanks
>
> John
>
>
>
>
> __________________________________________________________________________
> _
>
> John Ticic
> Extern - AMB Generali Informatik Services GmbH
> SD-d Anwendungs- und Systembetrieb
> Anton-Kurze-Allee 16
> 52074 Aachen
>
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>
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>
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