Glossary term
What is USE (Utilisation, Saturation, Errors)?
USE stands for Utilisation, Saturation, Errors.
Key metrics for resources (CPU, disk, network). Example: CPU 70%, 12 requests waiting, 0 errors.
Learn it properly · System DesignLesson 46: Logs, Metrics & Traces: The Three Pillars“Checkout took 20 seconds and failed” — but checkout touches eleven components. How logs, metrics and traces each answer a different question, how to instrument with OpenTelemetry, and how linking them takes you from “something's wrong” to “here's why” in minutes.