Automatic Manageability Features : Automatic Workload Repository (52)

Automatic Workload Repository (AWR) is a built-in repository in every Oracle
Database. At regular intervals, the database makes a snapshot of all its vital statistics
and workload information and stores them in AWR. By default, the snapshots are
made every 60 minutes, but you can change this frequency. The snapshots are stored in
the AWR for a period of time (seven days by default) after which they are
automatically purged.

自動管理特性 : 自動負載庫
每60分中 , 資料庫對重要的統計資料以負載資訊進行快照 , 儲存至awr中. 預設情況下 ,
快照將保留7天 ,其後由Oracle自動清除

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