Chapter 3 — Performance Fundamentals
Purpose
[stub: performance-fundamentals]
Metadata
| Author | Amit Singh |
| Scope | system-design |
Local graph
Related notes
Chapter 2 — Thinking in Systems
Feedback loops, bottlenecks, failure domains, and Conway's Law as the lens principal engineers use to reason about a system before drawing a single box.
Chapter 1 — What Changes at L6/L7
Why the bar shifts from correct designs to defensible trade-offs, and what interviewers are actually scoring for at the Principal/Staff level.
Chapter 4 — Alerting Systems
Multi-window burn-rate alerts, recording rules, routing, and deduplication as the difference between an actionable page and noise.
Chapter 3 — Monitoring at Scale
Prometheus, Mimir, Cortex, and Thanos as the horizontally-scaled answer to a single Prometheus instance running out of room.