Use
The
performance database records all performance data that was reported to the monitoring architecture. You can use it to display the current values of performance data and to compare it with the values that were reported over a specific period of time.You can aggregate data from the performance database for a single day, or on a weekly, monthly, quarterly or yearly basis.

To display aggregate data, you must follow the procedure described below. No aggregate data exists in the performance database until you request it. Once the data has been requested, it is stored in the performance database as defined in the reorganization schema, until it is requested again or deleted.
Procedure
See also:
Creating and Scheduling a Reorganization Schema Graphing Performance Data