ModifyMasterSpec - AnalyticDB - Alibaba Cloud Documentation Center

Changes the specifications of coordinator node resources for an AnalyticDB for PostgreSQL instance.

Operation description

This operation is not available for instances in reserved storage mode.

Before you call this operation, make sure that you are familiar with the billing of AnalyticDB for PostgreSQL. For more information, see Billing methods and AnalyticDB for PostgreSQL pricing.

Debugging

You can run this interface directly in OpenAPI Explorer, saving you the trouble of calculating signatures. After running successfully, OpenAPI Explorer can automatically generate SDK code samples.

Debug

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:
- For mandatory resource types, indicate with a prefix of * .
- 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.

Operation	Access level	Resource type	Condition key	Associated operation
gpdb:ModifyMasterSpec	update	DBInstance `acs:gpdb::{#accountId}:dbinstance/{#DBInstanceId}`	none	none

Request parameters

Parameter	Type	Required	Description	Example
ResourceGroupId	string	No	The ID of the resource group to which the instance belongs. For information about how to obtain the ID of a resource group, see View basic information of a resource group.	rg-bp67acfmxazb4p****
DBInstanceId	string	Yes	The instance ID. Note You can call the DescribeDBInstances operation to query the IDs of all AnalyticDB for PostgreSQL instances in a region.	gp-xxxxxxxxx
DBInstanceDescription	string	No	The description of the instance.	test
MasterCU	integer	No	The specifications of coordinator node resources. Valid values: 2 CU 4 CU 8 CU 16 CU 32 CU Note You are charged for coordinator node resources of more than 8 compute units (CUs).	8 CU
MasterAISpec	string	No	This parameter must be specified if you want to change coordinator nodes to AI coordinator nodes. Note You cannot specify the MasterAISpec and MasterCU parameters at the same time. You can change coordinator nodes to AI coordinator nodes only in specific regions and zones. Only AnalyticDB for PostgreSQL V7.0 instances of Basic Edition support AI coordinator nodes. You can view the valid values of this parameter on the configuration change page of coordinator nodes.	ADB.AIMedium.2

Response parameters

Parameter	Type	Description	Example
	object
RequestId	string	The request ID.	ABB39CC3-4488-4857-905D-2E4A051D0521
ErrorMessage	string	The returned message. This parameter is returned only if the request fails.	******
DbInstanceId	string	The instance ID.	gp-bp12ga6v69h86****
Status	boolean	Indicates whether the request was successful. Valid values: false true	true

Examples

Sample success responses

JSONformat

{
  "RequestId": "ABB39CC3-4488-4857-905D-2E4A051D0521",
  "ErrorMessage": "******",
  "DbInstanceId": "gp-bp12ga6v69h86****",
  "Status": true
}

Error codes

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

Change history

Change time	Summary of changes	Operation
2024-08-29	The internal configuration of the API is changed, but the call is not affected	View Change Details