I've filled out a good chunk of wait documentation for Oracle at: http://sites.google.com/site/embtdbo/wait-event-documentation Seems like it would best be a collaborative project. I've included notes and/or links from several people already : Tanel Poder, Marcin Przepiorowski, Jonathan Lewis, Karl Arao Randolf Geist and Joze Senegacnik. If you are interested in contributing or have questions please let me know. There is a comment section on each page, but unlike blogs, Google sites requires people to sign up to Google and that I add them to the contributor list. If you'd like to be added to the contributor list let me know and I can add you. Best Wishes Kyle Hailey http://db-optimizer.blogspot.com/