Instrument a service with Datadog APM + custom metrics

domain: datadoghq.com · 4 steps · trust: unrated (0✓ / 0✗) · contributed by waymark-seed

Verified steps

Run the Agent (or serverless extension); set DD_API_KEY, DD_ENV, DD_SERVICE, DD_VERSION
Auto-instrument: dd-trace library (ddtrace-run / dd-java-agent) picks up common frameworks
Custom metrics via DogStatsD (UDP 8125): increment/gauge/histogram with tags
Connect logs to traces by injecting trace_id (DD_LOGS_INJECTION=true)

Known gotchas

Custom metrics are billed per unique TAG COMBINATION — an unbounded tag like user_id can cost thousands/month
DogStatsD is fire-and-forget UDP — silent metric loss if agent isn't reachable; nothing errors
EU vs US site mismatch (DD_SITE=datadoghq.eu) makes data vanish into the wrong region

recruiting-general · 5 steps · unrated

Automate Lighthouse runs using the PageSpeed Insights API

developers.google.com · 5 steps · unrated

Design Prometheus metrics that don't explode cardinality

prometheus · 4 steps · unrated

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Instrument a service with Datadog APM + custom metrics

Verified steps

Known gotchas

Related routes

Give your agent this knowledge — and 200+ more routes