Craig Shallahamer's Blog
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You were brought to this page based on an internet search
and as a free service to Oracle DBAs.
The text below is an except from the book,
Oracle Performance Firefighting, written by
Craig Shallahamer of
OraPub, Inc.
Figures and tables are not included on this page, only their reference.
To order the book in either print or PDF form, click
here.
©2009, 2010 by Craig Shallahamer. This is copyrighted material.
Please—Out of respect for those involved in the creation of the book and also for
their familes, we ask you to respect the copyright both in intent and deed. Thank you.
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<p>* Any performance tools will help. Any respectable tool kit will provide the information you need to perform a solid 3-circle analysis. Basic operating system tools such as vmstat and sar, and Oracle tools such as Statspack are enough to perform a strong analysis. These tools make it easier to get the information you need. Your analysis can go deeper, and you have a higher trust level in the raw data. When this occurs, both your productivity and analysis confidence increase. Regardless of your tools, because you're performing a 3-circle analysis, its built-in multiperspective analysis safeguards you from making a mistake.
p><p>Let's look at two case studies constructed to demonstrate how you would actually perform the 3-circle analysis. The first case study is very simple, and the second is slightly more complex.
p><p>In this case study, management is concerned about periodic and increasingly intense periods of performance slowdowns. Several key business processes are being affected, as well as general application performance. Management wants you to diagnose the system, recommend solutions, work with the various teams to ensure the solutions are implemented, and then confirm performance is back to previously accepted levels.
p>
©2009, 2010 by Craig Shallahamer. This is copyrighted material.
Please—Out of respect for those involved in the creation of the book and also for
their familes, we ask you to respect the copyright both in intent and deed. Thank you.
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