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Observability

Application Performance Monitoring

Choose an instrumentation and trace-analysis route for diagnosing request paths, latency, dependencies, and service performance.

Recommendation

Route by telemetry estate and investigation model.

Full-stack suites, open-standard operations, trace-centered investigation, and error-adjacent tracing create different ownership and cost boundaries.12

For: Application, platform, and reliability teams diagnosing production request performance

Main trade-off

APM can expose request paths and latency, but instrumentation, sampling, cardinality, retention, privacy, and telemetry cost become operating responsibilities.12345

Four APM routes

Datadog and New Relic share a full-stack suite route; the other routes prioritize open standards, high-cardinality investigation, or an existing error workflow.

  1. Instrumentation

    Verify supported runtimes, OpenTelemetry path, auto-instrumentation, custom spans, context propagation, and deployment ownership.13

  2. Investigation model

    Decide whether teams navigate from services, traces, high-cardinality events, errors, or a shared full-stack topology.14

  3. Telemetry control

    Model sampling, ingestion, retention, cardinality, sensitive attributes, region, and export or migration needs.12

  4. Suite economics

    Separate hosts, users, spans, ingest, retention, logs, profiles, RUM, support, and commitment dimensions.13

APM routes

Five formal candidates fit four routes; Datadog and New Relic must be compared inside the same full-stack-suite route.

An organization-wide commercial suite is required

Compare Datadog and New Relic.

Both can connect application performance to a broader telemetry estate, but their agents, entities, meters, and workflows differ.

Verify: Do not select either until representative instrumentation and total suite cost are modeled.12

OpenTelemetry and Grafana are strategic

Evaluate Grafana Cloud.

Application Observability fits teams already committed to Grafana and open collection.

Verify: Collector, label, dashboard, and telemetry-volume ownership remain material.3

Trace-centered exploratory debugging is primary

Evaluate Honeycomb.

A high-cardinality investigation workflow can suit teams debugging complex distributed behavior.

Verify: Validate event volume, sampling, team workflow, retention, and broader signal requirements.4

Tracing should extend an existing error workflow

Evaluate Sentry.

Sentry can connect performance spans to the issue-centric application context a team already uses.

Verify: Do not treat this as a substitute for general logging or infrastructure monitoring.5

Boundary: APM owns instrumented application requests, transactions, traces, services, latency, and field technical performance. Infrastructure resource metrics, external uptime checks, raw logs, and AI-specific traces remain separate decisions.

What actually differs

The decisive differences are instrumentation ownership, investigation workflow, telemetry portability, and the suite's cost surface.

Collection
Proprietary agents, OpenTelemetry, and hybrid collection create different migration and support paths.13
Investigation
Service maps, transaction traces, event exploration, and error-adjacent spans guide engineers differently.5
Control
Sampling, cardinality, retention, and sensitive attributes determine usefulness and cost.12
Scope
A full-stack suite can correlate signals but also expands procurement and operational coupling.1

Official resources

Verify current capabilities, collection boundaries, privacy controls, retention, and commercial terms in the official documentation before implementation.

DocumentationDatadog APM

Sources

Official product documentation supporting the decision routes and boundaries on this page.

  1. 1
    Datadog APM

    Datadog · Accessed Official

  2. 2
    New Relic APM introduction

    New Relic · Accessed Official

  3. 3
    Grafana Cloud Application Observability

    Grafana Labs · Accessed Official

  4. 4
    Honeycomb application traces

    Honeycomb · Accessed Official

  5. 5
    Sentry tracing documentation

    Sentry · Accessed Official