Observability: Metrics, Logs, and Traces

The three pillars of observability for understanding system behavior.

The Three Pillars

┌─────────────────────────────────────────────────────────────┐
│                    OBSERVABILITY PILLARS                    │
├─────────────────────────────────────────────────────────────┤
│                                                              │
│  METRICS              LOGS                TRACES             │
│  ────────            ─────               ───────             │
│  What's happening    Why it's happening  How requests flow   │
│                                                              │
│  • Request rate      • Error messages    • Request path      │
│  • Error rate        • Stack traces      • Service deps      │
│  • Latency           • Debug info        • Timing breakdown  │
│  • Saturation        • Audit events      • Correlation       │