Reason of thrashing

Question

What is the reason of thrashing? How does the system detect thrashing? Once this detects thrashing, what can the system do to remove this problem?

Answer 1

Thrashing is happen due to under allocation of the minimum number of pages needed by a process, forcing it to continuously page fault. The system can detect thrashing through evaluating the level of CPU utilization as compared to the level of multiprogramming. It can be eliminated by reducing the level of multiprogramming.