We discovered a SQL statement in Apex that would peg our Database Server and result in very poor performance throughout the Apex system. Our table at the time had some 2 million + rows. After working with support and Chris Miranti, we ended up purging the data from this table. Apex needs to develop a process that will keep this table house-cleaned of old/unused records. At this point, we are not sure what this table does or how Apex uses it.