Oracle Performance Firefighting by Craig Shallahamer Get the book here
Craig Shallahamer's Blog	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. ------------------------------- <p>14 The model used is the M/M/m Queuing Theory Analysis spreadsheet. Go to the OraPub web site (http://www.orapub.com) and search for "queuing theory." p><p>15 I am not implying the average operating system CPU utilization is 93%. In fact, it is probably higher. p><p>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." 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.	Know what's important before it's too late! OraPub's Performance Training is like no other... More Class Pics... Get student testimonials!