System load

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.