Where can I find more information about Oracle enqueues?
Oracle online documentation: Oracle9i Database Reference -> 3 Dynamic Performance (V$) Views -> V$LOCK Oracle9i Database Performance Tuning Guide and Reference -> 22 Instance Tuning -> Wait Events -> Enqueue Oracle10g Database Reference -> 4 Dynamic Performance (V$) Views -> V$LOCK Oracle10g Database Performance Tuning Guide -> 10 Instance Tuning Using Performance Views -> Wait Event Statistics -> Enqueue Waits