I have a web application running in Tomcat 6, and I\'ve managed to configure it to use the built-in DBCP connection pooling, and all is working very well, however I suspect
I was looking for snapshot isolation level. The setting which was reported correctly by the database server was
defaultTransactionIsolation="4096"
You may confirm by a query to sys.dm_exec_sessions which should report transaction_isolation_level = 5. Hope it helps someone.