How do I know when my database started running window maintenance

Since a few days we experienced slow behavior in our database about 15:30.

At this time yesterday, I noticed that our database has performed a work of collection of statistics on the table.  Then I watched resource_manager_plan parameter and noticed that we were in a maintenance window.

Is it possible to say what date this window began to run.  The reason why I ask, is that there is a possibility that this windows has been activated last week accidentally.

Thank you

Thomas

Select WINDOW_NAME, LAST_START_DATE, dba_scheduler_windows MANUAL_OPEN_TIME;

Tags: Database

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