A · PillarsBeginner35 min read
3. Metrics & dashboards
Observability Basics · 36 pages source format
RED (Rate, Errors, Duration) and USE (Utilization, Saturation, Errors). Prefer percentiles. Know gold signals.
What you'll learn
- RED/USE
- Cardinality caution
- Dashboard reading
Read a service dashboard
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Screenshot or note: RPS, error rate, p95 latency during a quiet and a busy window.
Pro tip. A flat average with spiky p99 means someone is hurting.
Clear?