Oracle Database uses the information stored in AWR to identify the need to perform
routine maintenance tasks, such as optimizer statistics refresh and rebuilding indexes.
Then the database uses the Scheduler to run such tasks in a predefined maintenance
window.
自动管理特性 : 自动维护任务
利用AWR中的信息来执行例行任务 , 如调整统计刷新,重建索引
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