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Modifies the parameters of a DB parameter group. To modify more than one parameter, submit a list of the following: ParameterName, ParameterValue, and ApplyMethod. A maximum of 20 parameters can be modified in a single request.

Changes to dynamic parameters are applied immediately. Changes to static

parameters require a reboot without failover to the DB instance associated with the parameter group before the change can take effect.

After you modify a DB parameter group, you should wait at least 5 minutes

before creating your first DB instance that uses that DB parameter group as the default parameter group. This allows Amazon RDS to fully complete the modify action before the parameter group is used as the default for a new DB instance. This is especially important for parameters that are critical when creating the default database for a DB instance, such as the character set for the default database defined by the character_set_database parameter. You can use the Parameter Groups option of the Amazon RDS console ( or the DescribeDBParameters command to verify that your DB parameter group has been created or modified.