Re: Measure CPW used

My gut call is that Rob is correct....

However, I know for example that MPG's Performance Navigator product
when graphing usage against CPW treats them the same. In other words,
the CPU% graph shows the same picture that the CPW graph does just
with different labeling as far as I can tell.

Also, for example with the small 520 boxes for instance, they have a
CPW of something like 3800. However, they can't support enough disk
to use all of that for a "normal" OLTP type workload. So to me, that
seems to indicate that CPW == CPU processing power available for the
most part.

Then again, I'm looking at MPG's tool an an 810. Perhaps there'd be
differences between the CPU% and CPW graphs on a system limited by
DASD.

HTH,
Charles

On Mon, Apr 27, 2009 at 1:16 PM, <rob@xxxxxxxxx> wrote:

I don't believe there is.  You really can't tie CPU% to CPW.  For example,
an intense scientific calculation can really beat CPU% but have nothing to
do with CPW.

iNav / Management Central/ Monitors has something called "transaction
rate" but I can't figure if they relate to CPW.

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com





From:
<ldwopt@xxxxxxx>
To:
midrange-l@xxxxxxxxxxxx
Date:
04/27/2009 01:00 PM
Subject:
Measure CPW used
Sent by:
midrange-l-bounces@xxxxxxxxxxxx



I understand how CPWs are used to indicate performance but is there a way
to measure how much of the CPW rating is being used on the system?
For example, if the system is rated at 100CPW and the average cpu
utilization is 50%, is the customer only using 50 cpw>

Thanks
Dave Willenborg
FNTS
Omaha, NE
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