vivo Internet Technology

Oct 29, 2025 · Databases

Why Did Redis Keys Suddenly Disappear? A Deep Dive into Memory Exhaustion and Client Buffer Overflow

This article analyzes a production incident where Redis failed to retrieve keys at 2 AM, tracing the root cause to a short‑term memory write‑full condition caused by massive GET request bursts that overflowed client output buffers, and outlines both emergency fixes and long‑term mitigations.