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

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 you apply a 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 a scaling group and go to the details page of the scaling group. You can use one of the following methods to go to the details page:
    • Click the ID of the scaling group in the Scaling Group Name/ID column.
    • Click Details in the Actions column of the scaling group.
  4. In the upper part of the page, click the Instance Configuration Sources tab.
  5. Click the Scaling Configurations tab.
  6. Find the scaling configuration that you want to apply and click Apply in the Actions column.
  7. Click OK.


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