In general, custom metrics are defined as any single, unique combination of a metric name, host, and tag that are sent using statsd, DogStatsD, via API, or through extensions made to the Datadog Agent.
Further details with examples on how we count a custom metric).
However, certain standard integrations can also emit custom metrics as specified below.
Standard integrations that are limited to 350 metrics by default and emit custom metrics:
If you’d like to increase this limit, email us!
Other standard integrations that don’t have a default limit set and also emit custom metrics: