The speed at which a CPU executes instructions is called theclock rate.
Most computers today have either multiple CPUs or CPUs with multiple cores (multicore processors).
These can execute operations in parallel.
The CPU is always either executing operations (busy), or waiting for input (idle).
Each CPU and each core can execute one operation at a time.
However, on Linux, processes waiting for disk activity are also included in the system load measurement.
Monitoring CPU load can help you analyse the workloads performed by your server and understand what can be done.
This requires analysis of the average and peak values for CPU usage and the CPU load.
