Modifies parameters of an ApsaraDB for RDS instance.

You can modify the parameters directly or by using a parameter template. After you submit the parameter reconfiguration request, ApsaraDB for RDS starts a task to apply the new parameter values to the instance. If a new parameter value takes effect only after the instance restarts, ApsaraDB for RDS restarts the instance. For more information about the reconfigurable parameters, see Use the console to set parameters.

Note Before executing a parameter reconfiguration task, ApsaraDB for RDS checks whether the target parameters exist, whether they are reconfigurable, and whether the new parameter values are valid.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes ModifyParameter

The operation that you want to perform. Set the value to ModifyParameter.

DBInstanceId String Yes rm-uf6wjk5xxxxxxx

The ID of the instance.

Parameters String Yes {"delayed_insert_timeout":"600","max_length_for_sort_data":"2048"}

The JSON strings of parameters and their values. All the parameter values are of the string type. Format: {"Parameter name 1": "Parameter value 1", "Parameter name 2": "Parameter value 2"...}

Note If you specify this parameter, you do not need to specify the ParameterGroupId parameter.
ClientToken String No ETnLKlblzczshOTUbOCzxxxxxxxxxx

The client token that is used to ensure the idempotency of requests. You can use the client to generate the value, but you must ensure that it is unique among different requests. The token can only contain ASCII characters and cannot exceed 64 characters in length.

Forcerestart Boolean No false

Specifies whether the modified parameters take effect only after the instance restarts. Valid values:

  • true: The system forcibly restarts the instance. If a new parameter value takes effect only after an instance restarts, you must set this parameter to true. Otherwise, the new parameter value cannot take effect.
  • false: The system does not forcibly restart the instance.

Default value: false.

ParameterGroupId String No rpg-xxxxxxxxx

The ID of the parameter template.

  • If you specify this parameter, you do not need to specify the Parameters parameter.
  • If applying the parameter template requires an instance restart, you must specify the Forcerestart parameter.

Response parameters

Parameter Type Example Description
RequestId String 542BB8D6-4268-45CC-A557-B03EFD7AB30A

The ID of the request.


Sample requests

http(s):// Action=ModifyParameter
&<Common request parameters>

Sample success responses

XML format


JSON format


Error codes

For a list of error codes, visit the API Error Center.