Explain the concept of connection pooling feature of EJB...

It is the extraordinary feature of Container as It increases the performance of the application.
The clients get a lot of help from this connection pooling as they don't need every time connection with the database. Many of the functions are already given in the connection pool.
An instance is picked from the connection pool when an instance is received for the client or turned this instance to the connection pool when the user completes his/her work.
The connections are available in a limited amount in the app server. Exceeding this limit, a pre-restrained amount of connection pool enhances. And when the need of connection goes normal, then these extra connection pools are eliminated.

Explain the concept of connection pooling feature of EJB container?