If the app. relies much on any complex joins, than PostgreSQL will probably be able to outperform MySQL. If it's mostly simple selects from a single table, than probably not. But as the number of users increases, PostgreSQL handles locking issues much better through its Multi-Version Concurrency Control, which is essentially better than row-level locking. So if you get the chance and time permits, I think it would be worthwhile to give PostgreSQL a try. --Wesley |