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# Configuring Internal Connection Pools

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An internal connection pool is a collection of reusable connections to a single data source provided by any session that persists to a data source. By default, such a session provides both an internal read and write connection pool.

In this case, you can do the following:

- Configure read and write connection pool options such as minimum and maximum number of connections, alternate connection configuration, and properties (arbitrary, application-specific named values).

- Create named connection pools for whatever application-specific purpose you choose.

- Create sequence connection pools that TopLink uses exclusively for obtaining object identifiers.

For more information about creating and configuring internal connection pools, see the following:

- "Creating an Internal Connection Pool"

- "Configuring an Internal Connection Pool"

For more information about configuring the type of connection pool your session uses, see "Configuring External Connection Pooling".