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Answer Posted / nisha
If the number of frames allocated to a low priority process
is lower than the minimum number required by the computer
architecture then in this case we must suspend the
execution of this low priority process.After this we should
page out all of its remaining pages and freeing all of its
allocated frames.This provision introduces a swap in,swap-
out level of intermediate CPU scheduling.Let take a example
of a process that does not have enough number of frames.If
the process does not have the number of frames it needs to
support pages in active use, it will quickly page fault.The
oly option remains here for process is to replace some
active pages with the page that requires a
frame.However,since all of its pages are in active use,it
must replace a page that will be needed again right
away.Consequently,it quickly faults again and again that
mean replacing pages that it must bring back in
immediately.This high paging activity is called
Thrashing.Or we can say that a process is Thrashing if it
is spending more time in paging then executing.Thrashing
results in severe performance problems.
| Is This Answer Correct ? | 42 Yes | 12 No |
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