Server: Glassfish v3 b22
The JPA persistence was not visible in GF v2 - monitoring capabilities were
limited as well. For production things like: current cache size, number of
active persistence units, cache hit rate etc. would be really interesting
(compare it with previous CMP 2.0 capabilities).
Really interesting would be invocations (performance and number of invocations)
of the EntityManager methods (should be easy to implement). A killer feature
would be monitoring of prepared statements and SQL statements at JDBC level
(invocation time and number of executions) in a table view.