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.
#performance
10 articles tagged #performance
Articles
What is connection pooling, and how does it work?
Why opening database connections is expensive, how pools lend and reuse them, two-tier pooling on large systems, Django's pool options, and the settings that matter.
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.
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 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.
How database indexing works, with Postgres examples
B-trees in plain English, reading EXPLAIN ANALYZE, composite, partial and covering indexes, what indexes cost, and adding them to a live Postgres table safely.
TLS 1.2 vs TLS 1.3: what changed and why it matters
TLS 1.3 connects faster and drops the options behind a decade of attacks. What changed, what 0-RTT risks, what it means on mobile, and whether to keep TLS 1.2.
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