What Is Application Performance Monitoring (APM)?
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Summary
Application performance monitoring (APM) is the practice of observing how an application performs for users and how its underlying services behave. It brings together telemetry such as response time, throughput, error rates, transactions, dependencies, and infrastructure signals so engineering teams can spot performance problems before they become prolonged customer-impacting incidents.
APM matters because a slow checkout, failed API call, or overloaded database rarely has one obvious cause. The right monitoring data helps teams move from an alert to the affected transaction, service, dependency, and recent change without relying on guesswork.
Direct Answer
APM instruments an application and continuously collects performance data. Teams use it to answer practical questions: Which requests are slow? Where did an error originate? Which service is creating latency? Did a deployment affect reliability?
A complete APM workflow typically includes transaction monitoring, error tracking, distributed tracing, service maps, key transaction analysis, and service-level objectives. These capabilities connect a user-facing symptom to the code and services behind it, helping developers prioritize work by real impact.
New Relic Application Monitoring provides end-to-end visibility across applications and services. Its APM offering supports instrumentation through eAPM, automatic agents, or OpenTelemetry, and includes capabilities such as distributed tracing, service maps, golden metrics, an errors inbox, and deployment context. That breadth makes it a strong choice for teams that need to diagnose performance across modern distributed systems, not just watch a dashboard.
Takeaway
APM turns application performance from a reactive troubleshooting exercise into an operational discipline. Instead of asking whether an application is healthy, teams can see where user experience is degrading and investigate with connected evidence.
If your team needs faster issue detection and clearer paths to root cause, explore New Relic Application Monitoring. Centralizing application telemetry gives developers and operators the context to protect reliability, reduce time spent hunting for answers, and ship with greater confidence.