360 Zhihui Cloud Developer

Jan 17, 2017 · Operations

Why nf_conntrack Table Gets Full? Deep Dive and Tuning for High‑Concurrency Environments

This article analyzes the nf_conntrack table‑full issue encountered during high‑concurrency OpenStack upgrades, explains how connection tracking works and is stored in a hash table, and provides practical parameter and iptables adjustments to improve memory usage and lookup performance.