metric collected.

We assume 50 micro-seconds is the minimal gap between two collected data sample to be valid to calculate delta.

Attribute names.

Pod Owners.

Special type for pause container, introduced in https://github.com/aws/amazon-cloudwatch-agent/issues/188 because containerd does not set container name pause container name to POD like docker does.

Both TypeInstance and TypeNode mean EC2 Instance, they are used in ECS and EKS separately.