Tracing application metrics are collected after you enable trace collection and instrument your application.
These metrics capture request counts, error counts, and latency measures. They are calculated based on 100% of the application’s traffic, regardless of any trace ingestion sampling configuration. Ensure that you have full visibility into your application’s traffic by using these metrics to spot potential errors on a service or a resource, and by creating dashboards, monitors, and SLOs.
Note: If your applications and services are instrumented with OpenTelemetry libraries and you set up sampling at the SDK level and/or at the collector level, APM metrics are calculated based on the sampled set of data.
Trace metrics are generated for service entry spans and certain operations depending on integration language. For example, the Django integration produces trace metrics from spans that represent various operations (1 root span for the Django request, 1 for each middleware, and 1 for the view).
The trace metrics namespace is formatted as:
trace.<SPAN_NAME>.<METRIC_SUFFIX>trace.<SPAN_NAME>.<METRIC_SUFFIX>.<2ND_PRIM_TAG>_serviceWith the following definitions:
<SPAN_NAME>span.name (examples: redis.command, pylons.request, rails.request, mysql.query).<METRIC_SUFFIX>duration, hits, span_count). See the section below.<2ND_PRIM_TAG><TAGS>env, service, version, resource, sublayer_type, sublayer_service, http.status_code, http.status_class, Datadog Agent tags (including the host and second primary tag). Note: Tags set on spans do not count and will not be available as tags for your traces metrics.trace.<SPAN_NAME>.hitsenv, service, version, resource, resource_name, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.hits.by_http_statusenv, service, version, resource, resource_name, http.status_class, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>env, service, resource, resource_name, version, synthetics, and the second primary tag.trace.<SPAN_NAME>.errorsenv, service, version, resource, resource_name, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.errors.by_http_statusenv, service, version, resource, http.status_class, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.Note: This is a deprecated namespace.
trace.<SPAN_NAME>.span_countenv, service, resource, all host tags on from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.span_count.by_http_statusenv, service, resource, http.status_class, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.durationsum:trace.<SPAN_NAME>.duration{<FILTER>}.rollup(sum).fill(zero) / sum:trace.<SPAN_NAME>.hits{<FILTER>}env, service, resource, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.duration.by_http_statusenv, service, resource, http.status_class, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.duration.by_serviceenv, service, resource, sublayer_service, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.duration.by_typeenv, service, resource, sublayer_type, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.duration.by_type.by_http_statusenv, service, resource, sublayer_type, http.status_class, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.duration.by_service.by_http_statusenv, service, resource, sublayer_service, http.status_class, http.status_code, all host tags from the Datadog Host Agent, and the second primary tag.trace.<SPAN_NAME>.apdexenv, service, resource / resource_name, version, synthetics, and the second primary tag.The following legacy apdex metrics are deprecated.
trace.<SPAN_NAME>.apdex.by.resource_<2ND_PRIM_TAG>_serviceenv, service, resource / resource_name, and the second primary tag.trace.<SPAN_NAME>.apdex.by.resource_serviceenv, service, and resource / resource_name.trace.<SPAN_NAME>.apdex.by.<2ND_PRIM_TAG>_serviceenv, service, and the second primary tag.trace.<SPAN_NAME>.apdex.by.serviceenv and service.Additional helpful documentation, links, and articles:
