Chapter 4 · Monitor, Troubleshoot, and Optimize·v2.0.0·Updated 6/28/2026·~8 min
What's changed: Deepened AZ-204 Chapter 4 to Associate depth (tables, scenarios, FAQ, traps; localized figures)
4.2Caching and Performance Optimization
Key points
Understand caching with Azure Cache for Redis (cache-aside, sessions), edge delivery with Azure CDN/Front Door, and optimization principles.
To make apps fast, cache hot data and deliver static content at the edge. Azure Cache for Redis and CDN/Front Door are key.
4.2.1Caching and edge delivery
- Azure Cache for Redis: in-memory cache; use cache-aside (read cache → DB on miss) and session storage.
- Azure CDN / Front Door: cache static content at the edge for global low latency; refresh via purge.
- Optimization: reduce round trips; improve responsiveness with caching, async processing, and right scaling.
Exam point
Common on AZ-204: cut DB load / lower latency = Azure Cache for Redis (cache-aside), fast static delivery = CDN/Front Door, stale content after update = CDN purge.
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