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# Configure connection capacity for a JDBC connection pool

You can configure the initial and maximum capacity for a JDBC connection pool.

To configure the connection capacity for a JDBC connection pool:

1. If you have not already done so, in the Change Center of the Administration Console, click Lock & Edit (see Use the Change Center).
2. In the Domain Structure tree, expand Services > JDBC, then select Data Sources.
3. On the Summary of Data Sources page, click the data source name.
4. Select the Configuration > Connection Pool tab.
5. In Initial Capacity, enter the number of physical connections to create when creating the connection pool.

   See Advanced Configuration Options for more information.

6. In Maximum Capacity, enter the maximum number of physical connections that this connection pool can contain.

   See Advanced Configuration Options for more information.

   Note: An easy way to boost performance of JDBC in WebLogic Server applications is to set the value of Initial Capacity equal to the value for Maximum Capacity when configuring connection pools in your data source.

7. Click Save.
8. To activate these changes, in the Change Center of the Administration Console, click Activate Changes.
   Not all changes take effect immediately—some require a restart (see Use the Change Center).