Types of caching: every layer from browser to database
Browser, CDN, reverse proxy, app memory, Redis and database: what each caching layer stores, who shares it, and how one results-day request moves through them.
#caching
11 articles tagged #caching
Articles
How to handle 100,000 concurrent users
Load balancing, caching, queues, read replicas, connection pooling, autoscaling and load testing: how to build a platform that survives its busiest minute.
Cache-Control headers explained: no-cache, no-store, max-age
What each Cache-Control directive does, no-cache vs no-store, ETags and revalidation, and ready-to-use headers for static files, HTML, APIs and HLS video.
CDN caching: how edge caches work, with Cloudflare rules
How edge caches decide hits and misses, what Cloudflare caches by default, cache rules for HTML, APIs and HLS, measuring hit ratio, and purging safely.
Nginx proxy_cache and microcaching: a practical guide
Set up Nginx proxy_cache, microcache dynamic pages for one second, bypass logged-in users, and stop pile-ups with cache locks and stale-while-updating.
Django caching: per-view, fragment and low-level caching
Pick a Django cache backend, use cache_page, template fragment caching and the low-level API safely, and invalidate with signals and versioned keys.
Redis cache: how it works, and Redis vs Memcached
Why Redis is fast, how TTLs and eviction policies work, how to size memory, when persistence matters for a cache, and how Redis compares with Memcached.
Caching strategies: cache-aside, write-through, write-back
Cache-aside, read-through, write-through and write-back compared: how each works, how each fails, and which suits course pages, progress and leaderboards.
Postgres materialized views: query-level caching
Precompute leaderboards and reports inside PostgreSQL: create and index materialized views, refresh them concurrently, schedule refreshes, and know the alternatives.
Cache invalidation and TTLs: strategies that work
TTLs, event-based deletes and versioned keys: choosing TTLs per data type, purging CDNs, avoiding stale reads after writes, and why eviction isn't invalidation.
Cache stampede and the thundering herd problem
Why one expired key can overload your database, and how locks, request coalescing, probabilistic early refresh, TTL jitter and serving stale data prevent it.
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