Understanding Linux system monitoring: a breakdown of htop and top metrics

• •Peteris Krumins details the specific meaning of CPU, memory, and load average columns in top and htop.
• •The guide clarifies the distinction between user, system, nice, and idle CPU time, which are often misinterpreted by novice administrators.
• •While the article explains current output, it does not address how containerization (cgroups/namespaces) alters the visibility of these metrics on modern cloud infrastructure.

Peteris Krumins has published a detailed technical breakdown of the output fields found in Linux system monitoring tools top and htop. These utilities provide the standard interface for diagnosing process performance, a skill that has remained a requirement for Linux system administration for decades. The guide addresses common confusion surrounding how Linux calculates 'load average' and process priority, though it primarily focuses on bare-metal or legacy virtual machine environments. As infrastructure shifts toward Kubernetes and containerized services, understanding how these tools report resource utilization in isolated environments remains a critical, often undocumented gap for developers.