Connection pooling in the JDBC 2.0 extension API is a framework for caching database connections. This allows reuse of physical connections and reduced overhead for your application. Connection pooling functionality minimizes expensive operations in the creation and closing of sessions.
a pooled connection instance represents a single physical connection to a database, remaining open during use by a series of logical connection instances.
A logical connection instance is a simple connection instance (such as a standard Connection instance or an OracleConnection instance) returned by a pooled connection instance.
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