问题:
A . Set the STATISTICS_LEVEL initialization parameter to ALL.
B . Create a baseline on a pair of snapshots that have the statistics of the peak-load period in the database.
C . Decrease the snapshot interval in the AWR to collect more number of snapshots during the peak-load period.
D . Set the snapshot retention period in the Automatic Workload Repository (AWR) to zero to avoid the automatic purging of the snapshots.
● 参考解析
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