We announced the upcoming end-of-support for the AWS CLI v1. For dates, additional details, and information on how to migrate, please refer to the linked announcement. For more information see the AWS CLI version 2 installation instructions and migration guide.
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The DescribeAutoScalingGroups API operation might be throttled when retrieving details for an Auto Scaling group that contains many instances. By default, this operation returns details for all instances in the group. To help prevent throttling, you can set the IncludeInstances parameter to false to exclude instance details from the response.
Amazon EC2 Auto Scaling is designed to automatically launch and terminate EC2 instances based on user-defined scaling policies, scheduled actions, and health checks.
For more information, see the Amazon EC2 Auto Scaling User Guide and the Amazon EC2 Auto Scaling API Reference .