This topic describes how to apply a scaling configuration. You can create multiple scaling configurations for a scaling group and apply one.

Background information

After you apply a scaling configuration, the scaling configuration takes effect and enters the Active state. Only one scaling configuration can be in the Active state in a scaling group. After a scaling configuration is applied, if you apply another scaling configuration, the previous scaling configuration enters the Inactive state.


  1. Log on to the Auto Scaling console.
  2. In the top navigation bar, select a region.
  3. Find the scaling group and use one of the following methods to open the details page of the scaling group:
    • Click the ID of the scaling group in the Scaling Group Name/ID column.
    • Click Details in the Actions column.
  4. In the upper part of the page, click the Configuration Source tab.
  5. In the upper-left corner of the Instance Configuration Source page, click Create Scaling Configuration.
  6. Find the scaling configuration that you want to apply and click Apply in the Actions column.
  7. In the message that appears, click OK.


After you apply a scaling configuration, Auto Scaling creates ECS instances based on the scaling configuration when a scale-out event is triggered.