You notice a performance change in your production Oracle 12c database. You want to
know which change caused this performance difference.
A.
Compare Period ADDM report
B.
AWR Compare Period report
C.
Active Session History (ASH) report
D.
Taking a new snapshot and comparing it with a preserved snapshot
Explanation:
A
A
Not A: Compare Period ADDM
Use this report to perform a high-level comparison of one workload replay to its capture or to
another replay of the same capture. Only workload replays that contain at least 5 minutes of
database time can be compared using this report.