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You can choose from the following dashboards on the Performance tab:
To open a dashboard, click the dashboards menu in the top right of the Performance tab and select the required one. For more information, see Dashboard Display Options.
When a dashboard displays its chart(s), hover over a chart name to see its description in the tooltip.
You can use a calendar in the top left to view metrics statistics for a selected day, week, or month. The selection can also include 7-day and 30-day periods.
Also, see Performance Data Retention and Backup.