How Does CMS Caching Work?
IntermediateQuick Answer
TL;DR
CMS caching stores pre-generated content at multiple layers — browser cache, CDN cache, application cache, and database cache — so the server doesn't regenerate pages on every request. Each layer intercepts requests before they reach the origin. Cache invalidation, triggered by content updates or webhooks, ensures users always receive fresh content without sacrificing speed.
Key Takeaways
- Caching operates at four distinct layers: browser, CDN, application, and database
- Each layer reduces load on the origin server and cuts response time
- Cache invalidation is as important as caching itself — stale content is a real risk
- Webhooks and event-driven invalidation keep caches fresh after content updates