System load

System load

What is a load average?

uptime

The load average is the average system load on a Linux server for a defined period of time. In other words, it is the CPU demand of a server that includes sum of the running and the waiting threads.

Typically, the top or the uptime command will provide the load average of your server with output that looks like:

0.5 means the minimum waiting time at the counter. Between 0.00 and 1.0, there is no need to worry. Your servers are safe!
1.5 means the queue is filling up. If the average gets any higher, things are going to start slowing down.
3.00 means there's a considerably long queue waiting, and an extra resource/counter is required to clear up the queue faster. 

https://www.site24x7.com/blog/load-average-what-is-it-and-whats-the-best-load-average-for-your-linux-servers#:~:text=What%20is%20a%20load%20average,running%20and%20the%20waiting%20threads.