Load Average: An Indicator for Only CPU Demand?

Load Average‘ is an age-old metric reported in various operating systems. It’s often assumed as a metric to indicate the CPU demand only. However, that is not the case. ‘Load Average’ not only indicates CPU demand, but also the I/O demand (i.e., network read/write, file read/write, disk read/write). To prove this theory, we conducted this simple case study.

Load Average Study

To validate this theory, we leveraged BuggyApp. BuggyApp is an open-source Java project that can simulate various performance problems. When you launch BuggyApp with the following arguments, it will cause high disk I/O operations on the host.

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