Application Performance Monitoring (APM)

In this section, we will use APM to drill down and identify where the problem is.

20 minutes

Persona

You are a back-end developer and you have been called in to help investigate an issue found by the SRE. The SRE has identified a poor user experience and has asked you to investigate the issue.

Info

RUM is the client-side view; APM is the server-side view. Following a RUM trace into the matching APM trace is end-to-end visibility in action — and how we’ll drill down to the back-end problem.

Today • 28/01/2026

Pieter Hagen 09:42

Hey Robert, I’ve triaged a customer satisfaction issue with Online Boutique. RUM shows poor page load times. I traced a user session to the backend using Related Content — the latency is coming from the paymentservice.

Pieter Hagen 09:43

Can you dig into the back-end and find the root cause? I’ll send you a link to the trace.

You 09:43

On it. I’ll check APM and the service map. 👍