Application Auto Scaling now provides scaling activity updates via Amazon EventBridge
Application Auto Scaling now publishes to Amazon EventBridge when a scaling policy scales your resource to the configured maximum. You may have set a maximum bound for cost control, this event notification gives you the visibility to check in and ensure that operating at maximum bound does not pose an availability risk for your application. This notification is available for all resource types that are supported for automatic scaling by Application Auto Scaling, including Amazon EC2 Spot Fleet requests, ECS services, DynamoDB tables and global secondary indexes, Aurora replicas, EMR clusters, Sagemaker endpoint variants, AppStream 2.0 fleets, Comprehend document classification endpoints, and AWS Lambda functions with provisioned concurrency.
Source:: Amazon AWS