ApsaraDB for MyBase:Upgrade host specifications

After you create a host in an ApsaraDB for MyBase dedicated cluster, you can change the host specifications to meet your business requirements. This topic describes how to upgrade host specifications.

Supported database engines

• MySQL

• SQL Server

• PostgreSQL

Precautions

• Host specifications can be upgraded, but not downgraded.

• The Upgrade Specifications option is dimmed and host specifications cannot be upgraded in the following scenarios:

  • An instance is being created on the host.

  • An instance that runs on the host is being migrated.

  • The host is locked due to expiration.

• Host specifications can be upgraded only within the same instance family. For more information about host instance types, see Instance types of hosts.

• When you upgrade host specifications, you must increase both the CPU cores and memory.

• The interval at which you upgrade the specifications of one host is at least 10 minutes.

• When you upgrade the specifications of a host, the host and its running instances restart.

  Note

  • When a host restarts, a primary/secondary instance switchover occurs on the host. This may cause one or two service interruptions.

  • The amount of time it takes to restart a host varies based on the duration of the primary/secondary instance switchover.

Billing rules

The following formulas are used to calculate the fees for upgrading host specifications:

Upgrade fees = Total fees of the new specifications for the remaining subscription period - Total fees of the original specifications for the remaining subscription period. Total fees of the new specifications for the remaining subscription period = Monthly fees of the new specifications/30/24 × Unused hours. Total fees of the original specifications for the remaining subscription period = Monthly fees of the original specifications/30/24 × Unused hours.

Procedure