The Oracle Documentation lists reasons for poor performance, but they are not as comprehensive or useful as our BC top-10 list. Oracle Corporation has never been as good at tuning their own software as third-party experts, and their performance cause list is missing many important factors.
Obviously, a mis-configured I/O sub-system is a major cause of poor Oracle performance, but some of the others will surprise you.
Click below to see the BC top-10 list of the most common Oracle performance problems:
http://oracle-tips.c.topica.com/maal8FqabJAW6bLGJrib/
The top-10 reasons for poor Oracle performance
