---
title: "Observability Guides"
description: "Measure user journeys, infrastructure health, and incident signals before they become outages."
canonical_url: https://optimi.com/en/guides/tags/observability
md_url: https://optimi.com/en/guides/tags/observability.md
---

# Observability Guides

Measure user journeys, infrastructure health, and incident signals before they become outages.

- [RUM vs Synthetic Monitoring](/en/guides/rum-vs-synthetic-monitoring.md): RUM and synthetic monitoring answer different performance questions. Learn when to use each, how to combine them, and how to turn signals into action.

- [Web Performance Budgets](/en/guides/web-performance-budgets.md): A practical method for setting, enforcing, and reviewing web performance budgets across page weight, Core Web Vitals, third parties, and delivery paths.

- [Log File Analysis](/en/guides/seo-log-analysis.md): Use server and edge logs to see how search crawlers really access your site, uncover wasted crawl activity, and connect SEO problems to infrastructure events.

- [Security Incident Response](/en/guides/website-security-incident-response.md): Build and rehearse a tested security incident response plan for website incidents: roles, evidence, edge provider escalation, customer communication, recovery, and lessons learned.

- [Unified Incident Timeline](/en/guides/unified-incident-timeline-cdn-waf-dns-origin.md): Correlate CDN, WAF, DNS, bot, DDoS, and origin evidence into a defensible incident timeline with provenance, confidence labels, privacy controls, and an SRE workflow.

- [Kubernetes SRE SLOs](/en/guides/kubernetes-sre-slos.md): A practical guide to Kubernetes SLOs, error budgets, and SRE alerting: latency indicators, multi-window burn-rate rules, and release decisions for production platforms.

- [Kubernetes Observability](/en/guides/kubernetes-observability.md): Build Kubernetes observability that connects cluster health, application requests, traces, logs, and edge delivery signals to faster incident diagnosis.

- [AI Harness Engineering](/en/guides/harness-engineering-coding-agents.md): AI harness engineering designs a bounded, testable coding-agent loop with task contracts, repository context, independent controls, and reviewable delivery evidence.

- [Agent Evaluation and Observability](/en/guides/agent-evaluation-observability.md): A practical framework for coding agent evaluation: versioned cases, deterministic graders, multi-trial variance, privacy-aware agent observability, and redaction proof.

- [Debug Next.js Caching](/en/guides/nextjs-vercel-cache-debugging.md): A production-safe Next.js cache debugging workflow to classify Acme Shop cache behavior, read Vercel cache headers and cache HIT MISS states, and recover with the narrowest Vercel action.