# ModifyDBParameterGroup
<a name="API_ModifyDBParameterGroup"></a>

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.

**Note**  
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.

**Important**  
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 Neptune 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 Neptune console or the *DescribeDBParameters* command to verify that your DB parameter group has been created or modified.

## Request Parameters
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 For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

 ** DBParameterGroupName **   
The name of the DB parameter group.  
Constraints:  
+ If supplied, must match the name of an existing DBParameterGroup.
Type: String  
Required: Yes

 **Parameters.Parameter.N**   
An array of parameter names, values, and the apply method for the parameter update. At least one parameter name, value, and apply method must be supplied; subsequent arguments are optional. A maximum of 20 parameters can be modified in a single request.  
Valid Values (for the application method): `immediate | pending-reboot`   
You can use the immediate value with dynamic parameters only. You can use the pending-reboot value for both dynamic and static parameters, and changes are applied when you reboot the DB instance without failover.
Type: Array of [Parameter](API_Parameter.md) objects  
Required: Yes

## Response Elements
<a name="API_ModifyDBParameterGroup_ResponseElements"></a>

The following element is returned by the service.

 ** DBParameterGroupName **   
Provides the name of the DB parameter group.  
Type: String

## Errors
<a name="API_ModifyDBParameterGroup_Errors"></a>

For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** DBParameterGroupNotFound **   
 *DBParameterGroupName* does not refer to an existing DB parameter group.  
HTTP Status Code: 404

 ** InvalidDBParameterGroupState **   
The DB parameter group is in use or is in an invalid state. If you are attempting to delete the parameter group, you cannot delete it when the parameter group is in this state.  
HTTP Status Code: 400

## See Also
<a name="API_ModifyDBParameterGroup_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/neptune-2014-10-31/ModifyDBParameterGroup) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/neptune-2014-10-31/ModifyDBParameterGroup)