You can downgrade the configurations, such as the instance type and public bandwidth, of a subscription Elastic Compute Service (ECS) instance when you renew the instance to meet your decreasing demand or reduce instance costs for the next billing cycle.
Prerequisites
The subscription instance that you want to manage meets one of the following conditions:
The instance expires in up to 15 days.
The instance has expired but is not released. You cannot downgrade the instance type of an expired instance.
Precautions
Effective time of configuration downgrade operations
After an instance is renewed and its configurations are downgraded, the new configurations do not take effect until the next billing cycle starts. The original configurations remain in effect during the remainder of the current billing cycle.
Impacts
If you renew an instance and downgrade the configurations of the instance before the instance expires, you cannot perform the following operations during the remainder of the current billing cycle:
Upgrade the instance type.
Temporarily upgrade the public bandwidth.
Resize disks, including partitions and file systems.
Procedure
Log on to the ECS console.
In the left-side navigation pane, choose .
In the upper-left corner of the top navigation bar, select a region.
Find the instance that you want to renew. In the Actions column, click Upgrade/Downgrade. In the Upgrade/Downgrade Wizard dialog box, select Renew and Downgrade and click Continue.
Change the configurations of the instance and renew the instance as prompted.
Read and select ECS Terms of Service, click Create Order, and then follow the on-screen instructions to complete the payment.
What to do next
If you change the public bandwidth of an instance that resides in the classic network from 0 Mbit/s to a non-zero value for the first time, restart the instance by using the ECS console or by calling the RebootInstance operation within the first seven days of the next billing cycle to make the new configurations take effect.