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You notice performance degradation in your production Oracle 12c database. You want to know what caused
this performance difference.
Which method or feature should you use?

A.
Database Replay

B.
Automatic Database Diagnostic Monitor (ADDM) Compare Period report

C.
Active Session History (ASH) report

D.
SQL Performance Analyzer

Explanation:

Reference:
http://docs.oracle.com/cd/E24628_01/server.121/e17635/tdppt_degrade.htm

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