Why do you care about the fetch counts. I would take another approach. Use
the SMF type 30 records to determine the jobs that use the most CPU and then
see what steps within the job are using the most and tackle their tuning.
You can also look at the step termination records as you mentioned below and
determine from there what steps use the most CPU and tackle those
programs.Strobe is an excellent tool but works at the job level so you still
have to determine what jobs to strobe.
In the past I had used SAS with MXG to provide a "pig" report of the top 100
cpu consuming jobs. We used that to determine what jobs and programs to
analyze. Also, keep in mind that by analyzing this at the job level you may
realize that certain steps can be eliminated or merged by doing things
better and smarter. In my opinion just looking at fetch counts and programs
is a very narrow view if you are trying to reduce overall mainframe CPU
consumption.
Just my .02.
Joel Wolpert
Performance and Capacity Planning consultant
WEBSITE: www.perfconsultant.com
----- Original Message -----
From: "Jan Vanbrabant" <[email protected]>
Newsgroups: bit.listserv.ibm-main
To: <[email protected]>
Sent: Tuesday, August 18, 2009 4:25 PM
Subject: Where to find statistics for fetched programs?
Hi,
I got the question how frequently programmes are fetched,
and then how much CPU they consume.
This in order to put together kind of a hit parade of big CPU consumers &
then tackle their tuning.
RMF can't help me while Monitor I and Monitor III provide long-term data
collection about system workload and resource utilization, while covering
all hardware and software components of the system.
Monitor II neither while it's about snapshot monitoring.
I had a look at SMF too:
RecordType4(04) (StepTermination) or
Record Type 30 (1E) Common Address Space Work - subtype 4 (Steptotal)
is a step in the right direction, but it's on step level.
But at first glance, we are rather interested in load module fetch counts
& CPU consumption independent of step/job.
Please route me to what-and-where-to-read.
Which utilities or analysis programs can ease the data collection &
analysis? MXG? Omegamon? Other?
I would appreciate you putting me on the right orbit.
JV
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