Thrashing occurs when
(A) When a page fault occurs
(B) Processes on system frequently access pages not memory
(C) Processes on system are in running state
(D) Processes on system are in waiting state
Answer: (B)
Explanation: Thrashing occurs processes on system require more memory than it has.
If processes do not have “enough” pages, the pagefault rate is very high. This leads to:
– low CPU utilization
– operating system spends most of its time swapping to disk
The above situation is called thrashing