What is the largest MySQL Databaase that you guys have seen? How does it run? For example is it fast at queries, does it have a lot of load,etc. The reason I ask is that this new place I started working at has a Mysql DB that is 400 gigs. Things are getting a bit slow, but I'm wondering if it's because of the tuning of the system and database or if Mysql just can't handle that load. Theories, suggestions, etc.