On 12/05/2012 3:09 AM, Mark Zelden wrote:
On Fri, 11 May 2012 10:53:18 -0500, Fred Lupher<[email protected]>
wrote:
We recently upgraded a pair of z9 602's to z196 602's. Every month I summarize
and chart the average CPU consumption of each of our Service Classes.
Following the upgrade, the SYSTEM Service Class went from 3000 to 8000 service
units per second. Unfortunately, I don't use report classes to break down the
SYSTEM Service Class, so I'm not able to identify what's responsible for the
increase. The before and after for all other Service Classes appear to be
consistent. Has anyone experienced this when upgrading to z196's, or have any
thoughts on where I might look?
Thank you
Address space level CPU consumption (SMF 30s) - before and after.
You can display this information with EasySMF (the 30 day trial will be
enough). You need all the the type 30 subtypes particularly subtype 6
interval records.
Load the SMF data for the relevant periods into the product. Depending
on the amount of SMF data and transfer speeds you may want to extract
the type 30 records to a separate dataset first. The type 70 and 72
records could also be useful e.g. if WLM looks to be the culprit.
Open the "Job Status - Job Status During Interval" report, and enter
SYSTEM as the service class. Change the time period to a representative
time period e.g. a day, week or the period of your report.
This report combines type 30 records during the time period to show
resource usage for each job/address space.
Click the "Service" column header to sort and see the largest consumers.
Click an entry in the list to view a graphical Job Profile from the type
30 records. This can show whether the consumption is uniform or whether
there are spikes that are worth investigating further.
You can open 2 instances of the program to view before and after.
You can download EasySMF from:
http://www.smfreports.com/download.html
Regards
Andrew Rowley
--
Andrew Rowley
Black Hill Software Pty. Ltd.
Phone: +61 413 302 386
EasySMF for z/OS: Interactive SMF Reports on Your PC
http://www.smfreports.com
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