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ApsaraDB for SelectDB:ModifyDBCluster

Last Updated:Dec 02, 2025

Scales out or in a specified ApsaraDB for SelectDB cluster.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

selectdb:ModifyDBCluster

update

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

DBInstanceId

string

Yes

The instance ID.

selectdb-cn-7213cjv****

RegionId

string

Yes

The region ID.

cn-hangzhou

DBClusterId

string

Yes

The cluster ID.

selectdb-xxxb9f2w-be

DBClusterClass

string

Yes

The instance class of the cluster. Valid values:

  • selectdb.xlarge: 4 cores, 32 GB memory.

  • selectdb.2xlarge: 8 cores, 64 GB memory.

  • selectdb.4xlarge: 16 cores, 128 GB memory.

  • selectdb.8xlarge: 32 cores, 256 GB memory.

  • selectdb.16xlarge: 16 cores, 512 GB memory.

  • selectdb.24xlarge: 24 cores, 768 GB memory.

  • selectdb.32xlarge: 32 cores, 1024 GB memory.

selectdb.2xlarge

Engine

string

No

The database type. The value is fixed to selectdb.

selectdb

CacheSize

string

No

The size of the reserved cache.

200

ClusterNodeType

string

No

ClusterNodeCount

integer

No

ScaleMax

number

No

ScaleMin

number

No

Response elements

Element

Type

Description

Example

object

Schema of Response

RequestId

string

The request ID.

0BF61F90-ACED-55DF-A6FE-56714B2BFCF6

DBInstanceId

string

The instance ID.

selectdb-cn-7213cjv****

Data

object

The returned data.

DBInstanceId

string

The instance ID.

selectdb-cn-7213cjv****

DBClusterId

string

The cluster ID.

selectdb-cn-7213cjv****

OrderId

integer

The order ID.

219396937240838

Examples

Success response

JSON format

{
  "RequestId": "0BF61F90-ACED-55DF-A6FE-56714B2BFCF6",
  "DBInstanceId": "selectdb-cn-7213cjv****",
  "Data": {
    "DBInstanceId": "selectdb-cn-7213cjv****",
    "DBClusterId": "selectdb-cn-7213cjv****",
    "OrderId": 219396937240838
  }
}

Error codes

HTTP status code

Error code

Error message

Description

400 InvalidCacheSize.NotSupport The specified parameter "CacheSize" does not meet the requirements. The parameter "CacheSize" does not meet the requirements.
400 InvalidUpdowngradeConfig.NoChange The upgrade or downgrade configuration is not changed, please re-select. The upgrade or downgrade configuration is not changed, please re-select.
400 OperationDenied.OrderProcessing There are orders in process. There are orders in process.
400 DocumentConvertFailed.ExceedFileSizeLimit The conversion has been failed, exceed file size limit. english description1
400 Forbidden User not authorized to operate on the specified resource, or this API does not support RAM. english description1
400 InvalidDBName The specified database name is not allowed. english description1
400 CreateOrderFailed Failed to create order. Failed to create order.
400 ClusterNotSupport Current instance cluster does not support this operation. The operation is not supported in the current cluster state.
400 PAY.INSUFFICIENT_BALANCE Insufficient account available balance. Insufficient account available balance.
400 ORDER.INST_HAS_UNPAID_ORDER Instance has unpaid order. The instance has an unpaid order.
403 OperationDenied.ScalingRuleIsEnabled the operator is not permitted due to scaling rule is enabled. When the time-sharing elastic policy is enabled, you cannot manually initiate cluster scaling.
403 DBClusterNotSupported The requested operation can not be performed while the cluster is not sale. The requested operation cannot be performed while the cluster is not running.
403 IncorrectDBInstanceState Current DB instance state does not support this operation. english description1
403 InstanceEngineType.NotSupport The instance engine and type does not support operations. english description1
403 InvalidDBInstanceState.NotSupport The specified instance state does't support this operation. The instance is in a state that does not support the current operation.
403 MoneyLessThan100 The Account Monet less Than 100. english description1
403 OperationDenied.DBNameAndAccountPrivilegeCount The operation is not permitted due to count of database or account privilege. english description1
403 InsufficientResourceCapacity The resource is out of usage. Not enough resources, please try again later.
403 INSUFFICIENT_AVAILABLE_QUOTA Your account available limit is less than 0, please recharge before trying to purchase. Your account available limit is less than 0, please recharge before trying to purchase
404 InvalidDBInstanceId.NotFound The DBInstanceId provided does not exist in our records. Instance does not exist.
404 InvalidDBClusterState.NotSupport The specified cluster state does't support this operation. This operation is not supported in the cluster state.
404 DBInstanceLocked The current instance lock mode does not support this operation. english description1
404 IncorrectVswitchId The specified parameter VSwitchId is not valid. english description1
404 InvalidApi.NotFound Specified api is not found, please check your url and method.
404 InvalidDBInstance.NotFound The specified instance is not found. english description1
404 InvalidDBInstanceClass.NotFound The specified instance classic does not exist. english description1
404 InvalidRegionId.NotFound The provided RegionId does not exist in our records. english description1
404 QueryPrice.Failed The inquiry failed. Contact Alibaba Cloud customer service representatives. english description1

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.