CloudWatch custom metrics

- [Instructor] CloudWatch provides a number of metrics … to track the operational state … of your AWS resources and workloads. … However, to get a comprehensive understanding, … the stock CloudWatch metrics may not be enough. … CloudWatch allows you to ingest your own custom metrics. … This can be used to monitor things … like the load time of a webpage, … the number of processes on your instance, … the total number of TCP connections, … the number of users currently logged in, … or the memory utilization of your EC2 instance. … Let's first understand why CloudWatch doesn't natively … support metrics, such as memory utilization. … Let's visualize the virtualization layers … that make up a service like EC2. … At the bottom is the physical layer consisting of servers, … design and operated by AWS. … On top of the physical layer, AWS installs a hypervisor. … On top of the hypervisor, individual virtual machines … known as EC2 instances are installed. … It is the job of the hypervisor … to map processor, memory, disk, and network requests …