Datadog recommends certain best practices for naming metrics, tags, and services.
Metrics reported by the Agent are in a pseudo-hierarchical dotted format (e.g.
http.nginx.response_time). This is described as pseudo-hierarchical because a hierarchy is not actually enforced, but the structure is used to infer certain relationships (e.g. “I see hostA and hostB are reporting
http.nginx.*, those must be web frontends”).
Note: Metric names are case sensitive in Datadog.
As a best practice, Datadog recommends using unified service tagging when assigning tags. Unified service tagging ties Datadog telemetry together through the use of three standard tags:
version. To learn how to configure your environment with unified tagging, refer to the dedicated unified service tagging documentation.
Examples of commonly used metric tag keys are