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by Craig Shallahamer Get the book here |
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Craig Shallahamer's Blog
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. ------------------------------- Figure 9-21. Shown is the ORTA information entered into a firefighting diagnostic template, which makes diagnosing, analyzing, and anticipating change impact much simpler. Clearly, db file scattered reads events are the issue. While the CPU subsystem capacity is not shown, Oracle is consuming only 26% of the available CPU resources. I've included one new piece of information in Figure 9-21. Notice that column K is the average type (Avg Type). Two different types of average calculations are shown in Figure 9-21: straight and weighted. While the straight average for the IO read wait times is not shown in the figure, it is calculated as follows: 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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