As I mentioned a few weeks ago, IMHO, singling out events to ignore in a
system-wide or even session-wide data collection is the wrong thing to
do. But you must ignore some events if you first make what I consider to
be errors in how you collect your data. If you collect data for only the
problem program during only the problem duration, then you should ignore
*none* of the events that you see. If you collect the data this way,
then *everything* you see will be a component of end-user response time.

Any other data collection method is misleading (and time-wasting) in
many cases; one example of such a case is the rather longish example I
described.

 
Cary Millsap
Hotsos Enterprises, Ltd.
http://www.hotsos.com

Upcoming events:
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Dallas
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-----Original Message-----
Williams
Sent: Friday, June 14, 2002 11:38 AM
To: Multiple recipients of list ORACLE-L

I am trying to break the response time of my system into the wait and
service times. I am able to determine the service time by the "CPU used
by
this session" line in the statspack report. The wait time I am having
trouble with. I am working from the 'Yet Another Performance Profiling
Method' document. The document lists a number of events that should not
be
included in the calculation because they are caused by background
process
waits. I am tuning an 8.1.6 databases and want to be sure I am only
counting
the appropriate events in this calculation. How can I get the list of
events
to include for my version of the database (the doc is quite old)? 

Thanks
Erik

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