What indicators do you use to measure system load?

The following indicators are usually used to measure system load:

• CPU Load — shows how loaded the processor cores are. In Linux, for example, it is the average number of processes waiting to be executed.
• Memory usage (RAM) — how much RAM is occupied and how much is free.
• Disk usage — read/write speed, percentage of disk space used.
• Network activity — volume of data transmitted and received, number of active connections.
• Number of processes and threads — total number of active processes and threads.

Example command to view CPU and memory load in Linux:

 top

Or to get the average load over 1, 5, and 15 minutes:

 uptime

These indicators help understand how loaded the system is and where bottlenecks may occur.