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.
自动管理特性 : 自动负载库
每60分中 , 数据库对重要的统计数据以负载信息进行快照 , 保存至awr中. 默认情况下 ,
快照将保留7天 ,其后由Oracle自动清除
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