Core Concepts · TL;DR
1 min readRapid overview
TL;DR
Observability rests on three pillars — metrics (cheap, aggregatable numbers good for alerts and dashboards), logs (high-cardinality records good for debugging), and traces (request flow across services). Pair them with SLOs and error budgets and you can alert on user-visible symptoms instead of internal causes, which is what kills alert fatigue and keeps on-call sustainable.