Observability
Observability
Understanding observability for system design interviews.
1 min readConcepts · System Design
Overview
Observability is the ability to understand a system's internal state from its external outputs. The three pillars of observability are metrics, logs, and traces.
Topics
Logging
Structured logging and log aggregation
Monitoring & Metrics
System metrics and alerting
Distributed Tracing
Request tracing across services
The Three Pillars
Why Observability Matters
| Benefit | Description |
|---|---|
| Debugging | Find root cause of issues |
| Performance | Identify bottlenecks |
| Reliability | Detect and alert on failures |
| Capacity | Plan for growth |
| Business | Track KPIs and SLOs |
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