You can downgrade configurations (including the memory size and the number of vCPU cores) of Subscription instances. The configurations immediately take effect after instance restart.


  • Only members who reach certain membership levels can downgrade instance configurations.
  • You can downgrade configurations of only one instance at a time.
  • You can change the instance configurations only to lower-level configurations. That is, changes to configurations of the same level or a higher level are not allowed.
  • You can only downgrade the configurations of each instance a maximum of three times. Configuration downgrade operations include instance configuration downgrades, bandwidth configuration downgrades, and cloud disk billing method adjustments.
  • The time interval between two downgrade operations must be at least 5 minutes.


The configurations of an instance can be downgraded only if the instance meets the following conditions:

  • The billing method is Subscription or weekly payment.
  • The instance is in Stopped state.
  • The instance works properly. That is, the instance cannot be in an abnormal state, such as overdue, outdated, locked, or to be released.
  • The instance cannot have any ongoing configuration downgrade renewal process.


A configuration downgrade may result in a refund. The refund amount is the result of the following formula: Refund amount = Remaining amount of the configuration fee before the downgrade - Price of the new configurations. (The refund will be returned only when the result is a positive value.)


  1. Log on to the ECS Console.

  2. Find the target instance and click Change Configuration in the Action column.

  3. In the displayed dialog box, select Configuration downgrade and Instance Type.

  4. Select a desired instance type, confirm the refund amount, and read and confirm that you agree with the ECS Service Terms.

  5. Click Downgrade Now.

What to do next

Restart the instance for the new configurations to take effect.