Change the configuration of an RDS Custom instance - - Alibaba Cloud Documentation Center

This topic describes how to change the instance type of an RDS Custom instance.

Changeable items

Warning

During the configuration change, your instance may be paused or experience a transient connection, which can interrupt your services. We recommend that you perform this operation during off-peak hours.

Changeable item	Description	Service impact
Instance type	You can change the instance types of only Standard Edition instances that use disks. Note You cannot change the instance types of instances that use the mysql.xse8.3xlarge.7cm (storage-enhanced instance family se7) instance type. Before you change the instance type, see Instance types that can be changed and RDS Custom instance types to check whether the instance type can be changed. For example, if an instance uses the mysql.x8.2xlarge.7cm (16 cores, 128 GiB) instance type, which is the largest instance type that can be changed, you can only downgrade the instance. You cannot upgrade the instance.	The instance may be paused or a transient connection may occur, which interrupts your services.

Change the instance type

Prerequisites

For more information about the destination instance families that are available, see Instance types that can be changed.
You can change the instance type only for Standard Edition instances that use disks.
The instance must be in the Running or Paused status.
Note
After you change the instance type, the instance status remains unchanged.

Procedure

Log on to the RDS console. In the navigation pane on the left, click RDS Custom > Instances. Then, select a region at the top of the page.
Click the instance ID to go to the instance details page.
On the Basic Information page, in the Configuration Information section:
- For a subscription instance, click Upgrade or Downgrade.
- For a pay-as-you-go instance, click Change Specifications
On the Change Specifications page, select the destination instance type.
Select the Terms of Service and click Change Now. In the dialog box that appears, confirm the instance information before and after the configuration change. Then, click Continue to complete the payment.
Warning
You cannot cancel a configuration change order after you submit it. Before you change the configuration, carefully evaluate your business requirements.

Instance types that can be changed

The instance types to which you can change are subject to the following limits:

Important

The available destination instance types and families depend on factors such as the inventory in the zone. The instance types that are displayed on the action page are the ones that are available for selection.

Upgrade configuration

Source instance family	Destination instance family
Intel disk-based x6	Intel disk-based x6, Intel disk-based x7
Intel disk-based x7	Intel disk-based x7
Intel disk-based x8	Intel disk-based x8
High-frequency hf7	High-frequency hf7, Intel disk-based x7
AMD disk-based xa7	AMD disk-based xa7, Intel disk-based x7
AMD disk-based xa8	AMD disk-based xa8

Downgrade configuration

Source instance family	Destination instance family
Intel disk-based x6	Intel disk-based x6
Intel disk-based x7	Intel disk-based x7
Intel disk-based x8	Intel disk-based x8
High-frequency hf7	High-frequency hf7, Intel disk-based x7
AMD disk-based xa7	AMD disk-based xa7
AMD disk-based xa8	AMD disk-based xa8

Related API operations

API operation	Description
ModifyRCInstance	Upgrades or downgrades the instance type of an RDS Custom instance.
ModifyRCDiskSpec	Changes the disk type or performance level.

:Change the configuration of an RDS Custom instance