Now that your instance is up and running, you want to monitor its performance and load.
Use CloudWatch to get detailed data about your instance.
Monitoring the health and performance of your instances is an important part of operating any website or service. The CloudWatch service provides the ability to get detailed monitoring data about your EC2 instances and other AWS resources.
Example 2-13 illustrates how to enable monitoring on an EC2 instance and then retrieve various types of monitoring data for that instance.
First, we will find our existing instance and enable CloudWatch monitoring. A free tier of CloudWatch monitoring includes a limited set of metrics measured on a five-minute interval. There is an additional hourly charge for monitoring your instance if you want access to more metrics or finer-grained measurements. See http://aws.amazon.com/cloudwatch/ for details.
Example 2-13. Enable Monitoring Your Instance