Database files are very small, 1k or so. It'll take petabytes of editing media for the database to get to significant GB sizes. So unless you're editing a full feature length movie every week, it'll take a loooong time for that data base to rebuild again. You're safe leaving it where it is.
I purged the cache on Bridge too, so that may have helped also.
Bridge's database CAN be quite large, especially if one has a lot of material on the system, that goes into Bridge. I am always a bit surprised at how large those database files can be, over a year's usage.
As I am using Bridge more on a Project basis, with the original Asset files on my NAS, or elsewhere, I can usually safely purge those, when they grow very large - I no longer need those, when the Projects are completed, and the Copies of my Assets are also Deleted from the system.