MaGe Linux Operations

May 23, 2020 · Operations

Why Is Disk IOWait Spiking on Storm Nodes? Uncover kjournald, pdflush and Tuning Tips

This article investigates intermittent disk IOWait spikes on Storm machines, identifies the kjournald and pdflush processes as primary contributors, explains ext3 journaling modes, and offers practical mount‑option tweaks like adding noatime to improve disk performance.