Question 1

What is application performance monitoring (APM) software?

Accepted Answer

APM software continuously measures how fast and reliably an application responds, then helps teams find the cause of slowdowns or errors. It typically combines metrics, distributed traces, and sometimes logs.

Question 2

How is APM different from infrastructure monitoring?

Accepted Answer

Infrastructure monitoring tracks the health of servers, containers, and networks, while APM focuses on application-level behavior like request latency, error rates, and code-level bottlenecks. Most modern platforms cover both, but APM is built around user-facing transactions.

Question 3

Do I need APM if I already use logs and metrics?

Accepted Answer

Logs and metrics tell you something is slow; APM traces show you which service, database call, or function caused it. For any system with more than a handful of services, dedicated tracing usually pays for itself in faster incident resolution.