Hi,
Does an EntityManager instance correspond one-to-one to a JDBC connection?
When the EM is closed, is the JDBC connection closed? That is, by opening
and closing EMs, is one also opening and closing JDBC connections?
I am using OpenJPA with Derby. There is no connection pooling:
property
... more to the background of my problem :
I create an EM instance and loop, calling persist() on perhaps 2,000
objects in batches of 50.
I run netstat -an | grep 1527 and observe thousands of TCP sessions being
open and closed. Eventually, there are almost 4,000 TCP sockets in
TIME_WAIT state.
The doc says:
EntityManagerFactory instances are heavyweight objects. Each factory might
maintain a metadata cache, object state
cache, EntityManager pool, connection pool, and more.
2.6.3. openjpa.jdbc.DriverDataSource
Property name: openjpa.jdbc.DriverDataSource
Configuration API:
