MySQL connection validity test in datasource : SELECT 1 or something better?

Question

I\'m setting up a failover cluster on MySQL, in a master/slave architecture. I\'m also configuring my JBoss Datasource, and I\'m looking for the better way to test my connec

Answer 1

The query we use at work to check the connection to a MySQL server is SHOW databases; which is nice and simple as it doesn't need you to have selected a particular database. I'd say it's pretty reliable and a query like that is pretty efficient.