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Amazon EC2 Auto Scaling adds additional filtering capabilities to DescribeScalingActivities API

Posted on: Jan 20, 2026

Amazon EC2 Auto Scaling now supports new filters in the DescribeScalingActivities API, making it easier to find and analyze specific scaling events in your Auto Scaling groups (ASGs). You can now filter scaling activities by start time and status code, reducing the time and effort required to troubleshoot scaling behavior.

Previously, retrieving specific scaling activities required paginating through potentially many events, which could be time-consuming and could impact performance. With the new filtering capabilities, you can quickly narrow down results to the exact activities you need. For example, you can filter to see only launch activities within a specific time range, or view in-progress scaling events. The new filters include: StartTimeLowerBound, StartTimeUpperBound, and Status. You can use filters individually or combine them to create more targeted queries.

This feature is now available in both Amazon Web Services China (Beijing) Region, operated by Sinnet, and Amazon Web Services China (Ningxia) Region, operated by NWCD. To learn more, visit the Amazon EC2 AutoScaling API Reference.