Programmer XiaoFu

Jun 15, 2026 · Backend Development

Why a Simple Redis Mutex Lock Isn’t Enough for Cache Breakdown – When to Use Never‑Expire or Logical Expiration

The article analyzes why a basic Redis mutex lock can cause thread blocking, latency spikes, and service collapse under high concurrency, and compares it with logical expiration and never‑expire with proactive updates, explaining their trade‑offs and how to choose the right cache‑breakdown mitigation strategy.