JDBC Type 4 Driver 2.0 Programmer's Reference (SQL/MX 2.x)

Connection and Statement Pooling
The Type 4 driver supports all interfaces required for WLS 8.1 connection pooling and statement
pooling. A WLS 8.1 JDBC sample is provided with the Type 4 driver product for demonstrating
connection pooling and integration.
WLS8.1 implements the connection pooling component. The WLS8.1 application server maintains the
cache of pooled objects, and retrieves an object when the client requests a connection.
When the application is finished using the connection object, that object is returned to the pool and made
available for future requests.
If the connection cannot be initialized, the pooling component discards the pooled connection object.