observability-knowledge
Observability Knowledge Base
Quick reference for the three pillars of observability, instrumentation patterns, and SLI/SLO/SLA definitions in PHP applications.
Three Pillars Overview
┌─────────────────────────────────────────────────────────────────────────────┐
│ THREE PILLARS OF OBSERVABILITY │
├─────────────────────────────────────────────────────────────────────────────┤
│ │
│ ┌──────────────────┐ ┌──────────────────┐ ┌──────────────────┐ │
│ │ LOGS │ │ METRICS │ │ TRACES │ │
│ │ │ │ │ │ │ │
│ │ What happened │ │ How much/many │ │ How requests │ │
│ │ (discrete │ │ (aggregated │ │ flow through │ │
│ │ events) │ │ measurements) │ │ services) │ │
│ │ │ │ │ │ │ │
│ │ • Errors │ │ • Counters │ │ • Spans │ │
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