Amazon CloudWatch
User Guide

Amazon CloudWatch Metrics and Dimensions Reference

This reference includes all the namespaces, dimensions, and metrics that you can use with CloudWatch. Namespaces are containers for metrics. Metrics, which are time-ordered sets of data points, are isolated from one another in different namespaces so that metrics from different applications are not mistakenly aggregated into the same statistics. In addition, each metric has a dimension, which is a name/value pair that you can use to filter metrics.