Alibaba Cloud Developer

May 30, 2018 · Operations

Why Did My CPU Hit 100%? Uncovering Hidden Linux Processes & Nice Value

An Alibaba tech support engineer investigates a server whose CPU appeared fully utilized, discovers the misleading 'ni' metric, reproduces the issue with high‑nice loops, uncovers hidden mining processes via ld.so.preload, and explains how to detect and mitigate such stealthy CPU hogs.