Oracle Performance Firefighting
by Craig Shallahamer

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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.
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©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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Figure 2-17 shows that only two SQL statements had the same first ten characters, and each of these occurs only twice. So it appears that nonbind variable SQL is not an issue. When nonbind variable SQL is an issue, this section may show hundreds of SQL statements with the first 100 characters exactly the same. An equivalent OSM script is simsql1.sql.

Figure 2-17 shows the last section of rtsysx.sql, displaying the operating system CPU utilization details. Starting in Oracle Database 10g, Oracle captures operating system CPU details and makes the information available through the v$osstat view. Chapter 5 provides more details about the v$osstat view, and Chapter 4 discusses the CPU utilization components.

Profiling a session or a group of sessions is another term for session-level ORTA. There are a number of formatting possibilities, with every report writer claiming his is the best. Figure 2-18 shows just one option for this type of report. This format clearly supports ORTA from a high-level classification all the way down to the wait events and service time categories.

©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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