Can you explain the concept of CloudWatch metrics and how they are structured? What are some examples of the namespaces, units, and dimensions you have worked with?
CloudWatch metrics are time-ordered data points representing the performance of AWS resources. They’re structured using namespaces, units, and dimensions. Namespaces categorize metrics by service (e.g., EC2, S3), while dimensions define characteristics for metric aggregation (e.g., InstanceId, ImageId). Units represent measurement scales (e.g., Bytes, Count).
Examples I’ve worked with include :
1. Namespace: AWS/EC2 – Metrics related to Amazon Elastic Compute Cloud instances.
2. Unit: Percent – Utilization or usage as a percentage.
3. Dimension: AutoScalingGroupName – Aggregating metrics across instances within an auto-scaling group.
