Database Tuning (MOSC)

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create an index, did it help, awr table query?

edited Mar 20, 2015 10:36AM in Database Tuning (MOSC) 3 commentsAnswered

We have some events that cause a certain wait event, "enq: TM – contention" which is a foreign key issue.  So, I'd like to figure out a way to query the AWR tables before and after to see if the rate of these waits changes before and after the index build.  I have not studied these table enough to know how to do this.  Seems like it can be done with WRH$_ACTIVE_SESSION_HISTORY, but it's complicated.  Help! 

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