What is the Convoy Effect?
FCFS algorithm is non-preemptive in nature, that is, once CPU time has been allocated to a process, other processes can get CPU time only after the current process has finished. This property of FCFS scheduling leads to the situation called Convoy Effect. Suppose there is one CPU-intensive (large burst time) process in the ready queue, and several other processes with relatively fewer burst times but are Input/Output (I/O) bound (Need I/O operations frequently).
Convoy Effect
Convoy Effect in Operating Systems
The Convoy Effect is a phenomenon associated with the First Come First Serve (FCFS) algorithm, in which the whole Operating System slows down due to a few slow processes.