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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. ------------------------------- 15 I am not implying the average operating system CPU utilization is 93%. In fact, it is probably higher. 16 Utilization equals the service time multiplied by the arrival rate, then divided by the number of CPU cores; U=St(/M. Response time equals the service time divided by one minus the utilization to the number of CPU cores power; Rt=St/(1-UM). For more details, see Forecasting Oracle Performance (Apress, 2007; p. 25-26) or visit the OraPub web site (http://www.orapub.com) and search for "forecasting formulas." Oracle does speak to me. In a way, I'm like an Oracle therapist. If it's hurting, I'll listen, and I'll expend a tremendous amount of effort trying to help alleviate its pain as quickly as possible, while minimizing disruption to its operation. If you're interested, I'll teach you how to do this as well. 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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