Question

A SysOps administrator needs to create a CloudWatch alarm that triggers when memory utilization on a fleet of Amazon Linux 2 EC2 instances exceeds 80%. When reviewing the available CloudWatch metrics for the instances, the administrator cannot find any memory-related metrics. What is the correct way to make these metrics available in CloudWatch?

Accepted Answer

Install and configure the CloudWatch agent on the EC2 instances to collect and publish memory metrics as custom metrics.

Answer

Enable detailed monitoring on the EC2 instances to increase the metric resolution and expose memory metrics.

Answer

Create a CloudWatch metric filter on the instance system logs to extract memory usage values.

Answer

Attach an IAM role with CloudWatch read permissions so the default memory metrics appear in the console.