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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 4-8. A sample sar output sampling every 15 seconds on an active Oracle system. There is plenty of idle time, so the system has plenty of CPU capacity. The CPU utilization sar option is -u. The %user, %system, %iowait, %steal, and %idle columns contain the same information as the corresponding columns in the vmstat command output. The new columns in the sar report are as follows: * Ending sample time: When you first run sar, no output appears. But the activity information is being stored until the first interval is complete, and then the output line appears. 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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