Monitor (CloudWatch)

AWS provides robust monitoring of EC2 instances, EBS volumes, and other services via the CloudWatch service. You can use CloudWatch to set thresholds on individual AWS services and send notifications via SMS or Email when these thresholds have been exceeded. For example, you can set a threshold on excessive storage throughput. You can also create your own metrics to monitor with CloudWatch. For example, you might write a custom metric to monitor the current free memory on your instances and to alarm or trigger an automatic response should a memory threshold be exceeded.

For details on the use of CloudWatch, see What is Amazon CloudWatch?