Function

This API is used to change DB instance specifications.

• Before calling an API, you need to understand the API in Authentication.
• Before calling this API, obtain the required region and endpoint.

Services will be interrupted for 5 to 10 minutes when you change DB instance specifications. Exercise caution when performing this operation.

Constraints

• The new DB instance specifications must be different from the original DB instance specifications.
• The instance class can be modified only for DB instances whose status is Available.
• The specifications of a DB instance can be changed only to the specifications of the same DB instance type. (For example, the specifications of a single DB instance cannot be changed to those of primary/standby DB instances.)
• The exclusive instance class of MySQL DB instances using local disks cannot be scaled down.

URI

• URI format

  POST https://{Endpoint}/v3/{project_id}/instances/{instance_id}/action

• Example

  https://rds.cn-north-1.myhuaweicloud.com/v3/0483b6b16e954cb88930a360d2c4e663/instances/dsfae23fsfdsae3435in01/action

• Parameter description

  Table 1 Parameter description

  Name	Mandatory	Description
  project_id	Yes	Specifies the project ID of a tenant in a region. For details about how to obtain the project ID, see Obtaining a Project ID.
  instance_id	Yes	Specifies the DB instance ID.

Request

• Parameter description

  Table 2 Parameter description

  Name	Mandatory	Type	Description
  resize_flavor	Yes	Object	For details, see Table 3.

  Table 3 resize_flavor field data structure description

  Name	Mandatory	Type	Description
  spec_code	Yes	String	Specifies the resource specification code. Use rds.mysql.m1.xlarge as an example. rds indicates RDS, mysql indicates the DB engine, and m1.xlarge indicates the performance specification (large-memory). The parameter containing rr indicates the read replica specifications. The parameter not containing rr indicates the single or primary/standby DB instance specifications.
  is_auto_pay	No	Boolean	Specifies whether the order will be automatically paid when the specifications of yearly/monthly DB instances are changed. true: indicates the order will be automatically paid. false: indicates the order will be manually paid. The default value is false.

  • Request example

    MySQL:

    {
    	"resize_flavor": {
    		"spec_code": "rds.mysql.m1.xlarge",
                    "is_auto_pay": true
    	}
    }

    PostgreSQL:

    {
    	"resize_flavor": {
    		"spec_code": "rds.pg.c2.medium.ha",
                    "is_auto_pay": true
    	}
    }

    Microsoft SQL Server:

    {
    	"resize_flavor": {
    		"spec_code": "rds.mssql.2014.se.s3.large.2",
                    "is_auto_pay": true
    	}
    }

Response

• Pay-per-use
  • Normal response

    Table 4 Parameter description

    Name	Type	Description
    job_id	String	Indicates the task ID.

  • Example normal response

    {
    	"job_id": "2b414788a6004883a02390e2eb0ea227"
    }

  • Abnormal response

    For details, see Abnormal Request Results.

Status Code

For details, see Status Codes.

Error Code

For details, see Error Codes.