EC2 network performance metrics add support for ConnTrack Utilization metric
Amazon EC2 network performance metrics now supports a new metric to monitor available EC2 instance tracked connections, the ConnTrack Utilization metric. EC2 instance Security Groups act as stateful virtual firewalls to control incoming and outgoing traffic. These stateful firewalls track network connection information to enable return traffic to and from an instance to pass through. With this new metric customers have visibility into the number of ConnTrack entries remaining, which will allow them to proactively manage capacity and select the right instance size to meet emergent demand.