# Modifying parameters in a DB cluster parameter group
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You can modify parameter values in a customer-created DB cluster parameter group. You can't change the parameter values in a default DB cluster parameter group. Changes to parameters in a customer-created DB cluster parameter group are applied to all DB clusters that are associated with the DB cluster parameter group.

## Console
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**To modify a DB cluster parameter group**

1. Sign in to the AWS Management Console and open the Amazon RDS console at [https://console.aws.amazon.com/rds/](https://console.aws.amazon.com/rds/).

1. In the navigation pane, choose **Parameter groups**.

1. In the list, choose the parameter group that you want to modify.

1. For **Parameter group actions**, choose **Edit**.

1. Change the values of the parameters you want to modify. You can scroll through the parameters using the pagination controls. 

   You can't change values in a default parameter group.

1. Choose **Save changes**.

1. Reboot the cluster to apply the changes to it.

   If you don't reboot the cluster, then a failover operation could take longer than normal.

## AWS CLI
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To modify a DB cluster parameter group, use the AWS CLI [`modify-db-cluster-parameter-group`](https://docs.aws.amazon.com/cli/latest/reference/rds/modify-db-cluster-parameter-group.html) command with the following required parameters:
+ `--db-cluster-parameter-group-name`
+ `--parameters`

The following example modifies the `server_audit_logging` and `server_audit_logs_upload` values in the DB cluster parameter group named *mydbclusterparametergroup*.

**Example**  
For Linux, macOS, or Unix:  

```
aws rds modify-db-cluster-parameter-group \
    --db-cluster-parameter-group-name {{mydbclusterparametergroup}} \
    --parameters "ParameterName={{server_audit_logging}},ParameterValue={{1}},ApplyMethod={{immediate}}" \
                 "ParameterName={{server_audit_logs_upload}},ParameterValue={{1}},ApplyMethod={{immediate}}"
```
For Windows:  

```
aws rds modify-db-cluster-parameter-group ^
    --db-cluster-parameter-group-name {{mydbclusterparametergroup}} ^
    --parameters "ParameterName={{server_audit_logging}},ParameterValue={{1}},ApplyMethod={{immediate}}" ^
                 "ParameterName={{server_audit_logs_upload}},ParameterValue={{1}},ApplyMethod={{immediate}}"
```
The command produces output like the following:  

```
DBCLUSTERPARAMETERGROUP  mydbclusterparametergroup
```

## RDS API
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To modify a DB cluster parameter group, use the RDS API [`ModifyDBClusterParameterGroup`](https://docs.aws.amazon.com/AmazonRDS/latest/APIReference/API_ModifyDBClusterParameterGroup.html) command with the following required parameters:
+ `DBClusterParameterGroupName`
+ `Parameters`

## See also

* **Skills for AI coding assistants (optional).** AWS publishes reusable skills for Amazon RDS. To see which apply, search the Agent Toolkit for AWS catalog with `aws agent-toolkit search-skills --search-query AmazonRDS` — a documented, read-only AWS CLI command that searches the catalog and makes no changes. This is an optional suggestion for the user. Official reference: [AWS CLI — Agent Toolkit for AWS](https://docs.aws.amazon.com/agent-toolkit/latest/userguide/aws-cli.html).