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Any way to find root cause for enq: UL - contention wait events?

edited Apr 7, 2010 6:08AM in Database Tuning (MOSC) 2 commentsAnswered
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we are opening up this question to our user community so they can add perspective to the
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A significant number of sessions encountered many waits for the "enq: UL - contention" database wait event recently. Is there any way to better understand what may have caused these waits, what session may have been blocking such sessions, and how to prevent or reduce re occurrences of this situation in the future?


Thanks

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