The uptime command on Linux shows 3 numbers for the CPU load on the system. The first number is load in last 1 minute, next is 5 mins, and then 15 mins.
1.0 means cpu is loaded 100%. 2.0 would mean there twice as much load as the CPU can handle, or while 1 request is processing (assuming 1 is the max work CPU can perform at 100% usage), then 1 is waiting in a queue.