The Performance Manager database task enables you to manage the size of the database and create a purge task for when the database becomes full.
Data collected from performance-data collection tasks is stored in a Multiple Device Manager (MDM) database. Depending on how often the data collection tasks are scheduled to run and the configuration of the storage device, the database might fill up. Two database functions enable you to manage Performance Manager data:
The sizing function shows used space and free space of the database. The purging function lets you create a task that purges the database. Using the Performance database panel, you can purge performance data based on the age of the data, the type of data, and the storage devices associated with the data.
After you specify the database purge information, it is saved as a noninteractive IBM Director task. You schedule all performance data-collection tasks using the IBM Director scheduler function.
IBM Director Task pane --> Multiple Device Manager --> Manage Performance --> Performance database task