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>Oracle has a tricky balancing act deciding when to give up and when to continue consuming CPU and holding latches. Over the years, the likelihood of Oracle running out of shared pool memory has decreased, but the chance of a 4031 error is still highly dependent on the amount of Oracle shared pool memory and the application. The following is an actual 4031 error message: </p><p>ORA-04031: unable to allocate 4192 bytes of shared memory ("shared pool","SELECT * F...","sql area (6,0)","kafco : qkacol"):4031:375:2008:ocicon.c </p><p>In this snippet, 4KB of memory was trying to be allocated in subpool 6, but for some reason, this could not be accomplished. Fortunately, there are a number of ways to reduce the likelihood of receiving the dreaded 4031 error. </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!