|
|
by Craig Shallahamer Get the book here |
|
|
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. ------------------------------- Service time is how long it takes a single arrival to be served, excluding queue time. If the arrival is defined to be an Oracle user call, then the service time may be something like 4.82 milliseconds per user call, or 4.82 ms/uc. While the total service time includes all the time to service transactions within a given interval, service time is specifically related to a single arrival service. The unit of time should be in the numerator, and the unit of work should be in the denominator. Depending on your data source, the information may be provided as work over time. Make sure to switch it to time over work. If you forget to do this, any other calculation based on the service time (for example, utilization and response time) will likely be incorrect. Besides the general utilization formula presented in the previous sections, the classic utilization formula is 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. |
Know what's important before it's too late!
OraPub's
Performance Training
is like no other...
More Class Pics...
Get student testimonials!