---
title: "GET /#Action=ModifyClusterParameterGroup"
method: GET
path: "/#Action=ModifyClusterParameterGroup"
---

# GET /#Action=ModifyClusterParameterGroup

`GET /#Action=ModifyClusterParameterGroup`

Modifies the parameters of a parameter group. For the parameters parameter, it can't contain ASCII characters.

For more information about parameters and parameter groups, go to [Amazon Redshift Parameter Groups](https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-parameter-groups.html) in the _Amazon Redshift Cluster Management Guide_.

## Query parameters

- `ParameterGroupName` string, required
- `Parameters` object[], required
  - `ParameterName` string — The name of the parameter.
  - `ParameterValue` string — The value of the parameter. If <code>ParameterName</code> is <code>wlm_json_configuration</code>, then the maximum size of <code>ParameterValue</code> is 8000 characters.
  - `Description` string — A description of the parameter.
  - `Source` string — The source of the parameter value, such as "engine-default" or "user".
  - `DataType` string — The data type of the parameter.
  - `AllowedValues` string — The valid range of values for the parameter.
  - `ApplyType` 'static' | 'dynamic' — Specifies how to apply the WLM configuration parameter. Some properties can be applied dynamically, while other properties require that any associated clusters be rebooted for the configuration changes to be applied. For more information about parameters and parameter groups, go to <a href="https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-parameter-groups.html">Amazon Redshift Parameter Groups</a> in the <i>Amazon Redshift Cluster Management Guide</i>.
  - `IsModifiable` boolean — If <code>true</code>, the parameter can be modified. Some parameters have security or operational implications that prevent them from being changed.
  - `MinimumEngineVersion` string — The earliest engine version to which the parameter can apply.
- `Action` 'ModifyClusterParameterGroup', required
- `Version` '2012-12-01', required

## Response `200`

Success

## Other responses

- `480` — ClusterParameterGroupNotFoundFault
- `481` — InvalidClusterParameterGroupStateFault

---

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