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. The server load threshold value should be between 0 to 50.
So, ideally, for critical servers, the server load should not exceed 1 for a single core processor.
Read our blog to know more on load average and how to determine if your server has sufficient load capacity.