In keeping with the AWS Managed Services (AMS) shared services responsibility model, the AMS monitoring system monitors your AWS infrastructure. For details on baseline monitoring in AMS, including AWS resources monitored and the type of alerts for each resource, see Alerts from baseline monitoring in AMS. For Amazon EC2 instances, AMS monitors the operating system and provides baseline monitoring based on OS metrics such as CPU utilization and root volume usage.
We recommend supplementing AMS monitoring with additional monitoring using AWS services tailored to your application. For guidance on monitoring for
availability see the "Monitoring and Alarming" section in this whitepaper Reliability Pillar