BAM Activity and Real-time Aggregations Windows

You can modify the duration data is kept in the BAMPrimaryImport database using the bam_Metadata_Activities table:

http://technet.microsoft.com/en-us/library/ms962341.aspx

In addition, if you are using Real-time Aggregations for BAM data, you can set the window of data kept using the bm utility and the set-rtawindow command:

http://msdn.microsoft.com/en-us/library/aa559458.aspx