Amazon EC2 Auto Scaling automatically adjusts compute capacity based on application demand, helping maintain consistent performance while optimising infrastructure costs. I especially like features such as Auto Scaling Groups, Launch Templates, Target Tracking Policies, Step Scaling, Scheduled Scaling, Mixed Instances Policies, and Instance Refresh, which make it easier to keep applications available as workloads fluctuate.

Once launch templates are in place, the configuration experience feels straightforward, and the integration with CloudWatch lets scaling decisions be driven by application metrics. Performance is excellent, since instances can be added or removed automatically without manual intervention. Overall, the service delivers strong ROI by reducing idle infrastructure while still ensuring there’s enough capacity during traffic spikes. Review collected by and hosted on G2.com.

Choosing the right scaling policies and cooldown periods takes careful testing so you can avoid unnecessary scaling events. To get the full benefit of automatic scaling, applications also need to be stateless, or have their session state managed externally. Review collected by and hosted on G2.com.