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ApsaraDB RDS:ModifyDasInstanceConfig

Last Updated:Apr 17, 2024

Configures automatic storage expansion for an instance.

Operation description

Supported database engines

  • MySQL
  • PostgreSQL


Note Before you call this operation, carefully read the following documentation. Make sure that you fully understand the prerequisites and impacts for calling this operation.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer.

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

  • Operation: the value that you can use in the Action element to specify the operation on a resource.
  • Access level: the access level of each operation. The levels are read, write, and list.
  • Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
    • The required resource types are displayed in bold characters.
    • If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
  • Condition Key: the condition key that is defined by the cloud service.
  • Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
OperationAccess levelResource typeCondition keyAssociated operation
  • DBInstance
  • rds:ResourceTag

Request parameters


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


The instance ID. You can call the DescribeDBInstances operation to query the instance ID.


Specifies whether to enable automatic storage expansion. Valid values:

  • Enable
  • Disable

The threshold in percentage based on which an automatic storage expansion is triggered. If the available storage reaches the threshold, ApsaraDB RDS increases the storage capacity of the instance. Valid values:

  • 10
  • 20
  • 30
  • 40
  • 50
Note If you set the StorageAutoScale parameter to Enable, you must specify this parameter.

The maximum storage capacity that is allowed for an automatic storage expansion. The value of this parameter must be greater than or equal to the current storage capacity of the RDS instance.

  • If the RDS instance uses ESSDs, the maximum value of this parameter can be set to 32000 GB.
  • If the RDS instance uses standard SSDs, the maximum value of this parameter can be set to 6000 GB.
Note If you set the StorageAutoScale parameter to Enable, you must specify this parameter.

Response parameters


The response parameters.


The request ID.



Sample success responses


  "RequestId": "C3C247D4-1643-4C5D-87C2-C829543FC626"

Error codes

HTTP status codeError codeError messageDescription
400AccessHDMInstanceFailedThe specified instance access HDM failed.The RDS instance failed to connect to DAS.

For a list of error codes, visit the Service error codes.

Change history

Change timeSummary of changesOperation
2022-06-23API Description Update. The Error code has changedsee changesets
Change itemChange content
API DescriptionAPI Description Update.
Error CodesThe Error code has changed.
    delete Error Codes: 400