Learn how to prevent Redis cache stampedes in Node.js production systems. This guide covers request coalescing, TTL jitter, and stale-while-revalidate patterns that stop one expired key from overwhelming your database with duplicate origin calls. Discover how to build safe per-key Redis leases using SET NX PX, with ownership-checked release so refreshes stay coordinated across replicas without permanent locks. Also explained: versioned cache keys, write-through invalidation, memory and eviction tuning, and observability metrics for hit rates, lease contention, and origin amplification. Includes concurrent load-testing strategies for hot-key traffic and full recovery scenarios. Read more: https://www.endurancesoftwares.com/blog/redis-cache-stampede-prevention-nodejs-guide-2026
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