ArcGIS Server monitoring with CloudWatch

Amazon CloudWatch is an optional service that you can purchase to monitor usage of your EC2 instances.

You can enable CloudWatch when you create an EC2 instance in the AWS Management Console. CloudWatch can also be configured on Amazon Elastic Load Balancers (ELBs), which you would use if you had many EC2 instances working together in one ArcGIS Server deployment. CloudWatch produces statistics and graphs describing the loads on your cloud-based services.

CloudWatch is the enabling mechanism for auto scaling in Amazon EC2. When you use the AWS Auto Scaling API to create and destroy instances automatically, the instances created have CloudWatch enabled. This is how the Auto Scaling API monitors usage of the instances.