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APM metrics sent by the Datadog Agent

Find below the list of out-of-the-box metrics sent by the Datadog Agent when APM is enabled:

Metric NameTypeDescription
datadog.trace_agent.startedCountIncrement by one every time the Agent starts.
datadog.trace_agent.panicGaugeIncrement by one on every code panic.
datadog.trace_agent.heartbeatGaugeIncrement by one every 10 seconds.
datadog.trace_agent.heap_allocGaugeHeap allocations as reported by the Go runtime.
datadog.trace_agent.cpu_percentGaugeCPU usage (in cores), e.g. 50 (half a core), 200 (two cores), 250 (2.5 cores)
datadog.trace_agent.presampler_rateGaugeIf lower than 1, it means payloads are being refused due to high resource usage (cpu or memory).
datadog.trace_agent.receiver.traces_receivedCountNumber of traces received and accepted.
datadog.trace_agent.receiver.traces_droppedCountTraces dropped due to normalization errors.
datadog.trace_agent.receiver.traces_filteredCountTraces filtered by ignored resources (as defined in datadog.yaml file).
datadog.trace_agent.receiver.traces_priorityCountTraces processed by priority sampler that have the priority tag.
datadog.trace_agent.receiver.traces_bytesCountTotal bytes of payloads accepted by the Agent.
datadog.trace_agent.receiver.spans_receivedCountTotal bytes of payloads received by the Agent.
datadog.trace_agent.receiver.spans_droppedCountTotal bytes of payloads dropped by the Agent.
datadog.trace_agent.receiver.spans_filteredCountTotal bytes of payloads filtered by the Agent
datadog.trace_agent.receiver.services_receivedCountServices received in /v0.x/ services endpoints.
datadog.trace_agent.receiver.services_bytesCountBytes accepted in /v0.x/ services endpoints.
datadog.trace_agent.receiver.events_extractedCountTotal APM events sampled.
datadog.trace_agent.receiver.events_sampledCountTotal APM events sampled by the max_events_per_second parameter sampler.
datadog.trace_agent.receiver.payload_acceptedCountNumber of payloads accepted by the Agent.
datadog.trace_agent.receiver.payload_refusedCountNumber of payloads rejected by the receiver because of the sampling.
datadog.trace_agent.receiver.suicideCountNumber of times the Agent killed itself due to excessive memory use (150% of max_memory).
datadog.trace_agent.trace_writer.flush_durationGaugeTime it took to flush a payload to the Datadog API.
datadog.trace_agent.trace_writer.payloadsCountNumber of payloads sent.
datadog.trace_agent.trace_writer.tracesCountNumber of traces processed.
datadog.trace_agent.trace_writer.eventsCountNumber of events processed.
datadog.trace_agent.trace_writer.spansCountNumber of spans processed.
datadog.trace_agent.trace_writer.bytesCountNumber of bytes sent (calculated after Gzip).
datadog.trace_agent.trace_writer.bytes_uncompressedCountNumber of bytes sent (calculated before Gzip).
datadog.trace_agent.trace_writer.bytes_estimatedCountNumber of bytes estimated by Agent internal algorithm.
datadog.trace_agent.trace_writer.retriesCountNumber of retries on failures to the Datadog API.
datadog.trace_agent.trace_writer.errorsCountErrors that could not be retried.
datadog.trace_agent.trace_writer.single_max_sizeCountIncrement by one when a single trace was flushed because it was bigger than the maximum allowed size by the Datadog API (3.2M).
datadog.trace_agent.stats_writer.flush_durationGaugeTime it took to flush a payload to the Datadog API.
datadog.trace_agent.stats_writer.payloadsCountNumber of payloads sent.
datadog.trace_agent.stats_writer.stats_bucketsCountNumber of stats buckets flushed.
datadog.trace_agent.stats_writer.bytesCountNumber of bytes sent (calculated after Gzip).
datadog.trace_agent.stats_writer.retriesCountNumber of retries on failures to the Datadog API
datadog.trace_agent.stats_writer.splitsCountNumber of times a payload was split into multiple ones.
datadog.trace_agent.stats_writer.errorsCountErrors that could not be retried.
datadog.trace_agent.service_writer.servicesCountNumber of services flushed. as the Agent config’s max_events_per_second parameter. set to 1 every time max_events_per_second is reached, otherwise it’s 0. of APM Events per second received by the Agent rate applied by the Agent to Events it received
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