Changes the node specifications of a specified PolarDB cluster.


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 No ModifyDBNodeClass

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

DBClusterId String Yes pc-*************

The ID of the cluster.

DBNodeTargetClass String Yes polar.mysql.x4.large

For more information about the node specifications, see Specifications and pricing.

ModifyType String Yes Upgrade

The type of the change. Valid values:

  • Upgrade: upgrades specifications.
  • Downgrade: downgrades specifications.
ClientToken String No 6000170000591aed949d0f54a343f1a4233c1e7d1c5c******

Ensures the idempotence of requests to prevent duplicate requests from being submitted. This parameter value is generated by the client. Make sure that the value is unique among different requests. The token is case-sensitive, and cannot exceed 64 ASCII characters in length.

Response parameters

Parameter Type Example Description
DBClusterId String pc-*************

The ID of the database cluster.

OrderId String 2035629******

The ID of the order.

RequestId String 685F028C-4FCD-407D-A559-072D63******

The ID of the request.


Sample requests

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

Sample success responses

XML format


JSON format

	"RequestId": "685F028C-4FCD-407D-A559-072D6378C4C3",
	"OrderId": "2035629******",
	"DBClusterId": "pc-**************"

Error codes

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