On 8/01/2013 22:04, Shane Ginnane wrote:
I might refer you to a thread on the RMF spreadsheet reporter from a few weeks
back.
Andrew ... ?
Thanks Shane :-)
If you need a tool to read the SMF data, you could download the 30 day
trial of EasySMF from:
http://www.smfreports.com/
My suggestion would be to set the time interval to cover a few days
before and after the change, then look at the charts for:
- System CPU Busy
- RMF Service by Service Class
- RMF Service by Report Class
and see whether there are any obvious changes.
Depending what you see you can use the Job Status reports to see more
detail about the jobs in that service/report class.
The Job Profile and Job History reports can show you information about
specific address spaces and jobs over time.
However, you say you are not sure what the CPU peaks were before
migrating. If it was already peaking at or close to 100% the problem
might be more related to the WLM policy. At 100% busy, subtle WLM
changes can make a big difference between everybody being happy and
everybody complaining. If you regularly have multiple service classes
missing goals, any changes to how WLM choses donors and receivers in
1.13 might trigger problems. (I don't know whether there were such
changes, but I wouldn't be surprised.)
For WLM, you could start with the Performance Index report.
Another possibility is hiperdispatch, if that has been newly enabled
with 1.13. I suspect hiperdispatch would have similar effects to moving
to fewer, faster processors which has been well documented. Fewer,
faster processors makes the WLM policy more important and problems tend
to show up as complaints about response times.
You should definitely look at whether the CPU usage has increased and
how much, and whether there are specific problems that caused it.
However, keep an open mind to other factors like WLM.
Regards
Andrew Rowley
--
Andrew Rowley
Black Hill Software Pty Ltd
[email protected]
+61 413 302 386
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