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Amazon ECS Managed Instances adds configurable scale-in delay

Published
November 19, 2025
https://aws.amazon.com/about-aws/whats-new/2025/11/amazon-ecs-managed-instances-configurable-scale-in-delay

Amazon ECS Managed Instances

ECS Managed Instances now provides greater control over infrastructure optimization with configurable scale-in delay. This allows you to fine-tune instance management based on your workload patterns and business requirements, balancing cost optimization with operational needs.

ECS Managed Instances automatically provisions right-sized Amazon EC2 instances based on workload requirements. It continuously monitors and optimizes costs by terminating idle instances and consolidating tasks. You can now set the scaleInAfter configuration parameter to up to 60 minutes to align with your specific needs, or set it to -1 to disable infrastructure optimization workflows.

You can configure the scaleInAfter parameter using ECS API, console, SDK, CDK, or CloudFormation. This feature is available in all commercial AWS Regions.

What to do

Source: AWS release notes




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