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client-output-buffer-limit

2 articles · Page 1 of 1
dbaplus Community
dbaplus Community
Jul 5, 2026 · Databases

Why Did Redis Keys Vanish at 2 AM Despite No Memory Alerts?

A production incident showed Redis keys disappearing at 2 AM without any memory alarms; deep analysis revealed a short‑term memory spike caused by a surge in GET requests, client‑output‑buffer‑limit growth, and LRU eviction, leading to practical mitigation steps.

client-output-buffer-limitkey evictionmemory
0 likes · 9 min read
Why Did Redis Keys Vanish at 2 AM Despite No Memory Alerts?
Architect
Architect
Jan 7, 2026 · Databases

Why Did Redis Suddenly Evict Keys? A Deep Dive into Memory, Pipelines, and Client Buffers

This article walks through a production incident where Redis began returning missing keys, detailing the step‑by‑step diagnosis—from monitoring logs and TTL checks to discovering memory spikes caused by client‑output‑buffer‑limit overflow and pipeline traffic—followed by emergency and permanent remediation measures.

client-output-buffer-limitevictionmemory
0 likes · 11 min read
Why Did Redis Suddenly Evict Keys? A Deep Dive into Memory, Pipelines, and Client Buffers