Hello John Kenneth Pinlac, 

Multiple users can access the server at same time in the live instance. 

Due to this, multiple processes are created in the CPU. To manage heavy traffic you need to use load balancer or can use workers. 
CPU time limit manages the space according to the server space. 

However, only few users use test instance; due to which you don't see the same issue in the test instance. 

Thanks

Anisha Bahukhandi

Technical Content Writer