Question

2. What is the cause of thrashing? 3. How does the system detect thrashing? 4. Once it detects thrashing, what can the system do to eliminate this problem?

Answer 1

Solution for the problem is provided below, please comment if any doubts:

2.

Thrashing cause:

• Thrashing is an Operating system abnormality that is related with virtual address.
• Thrashing is mainly occurred because of excessive paging operations happening in the OS.
• The excessive paging operations happens because of the insufficient locality of reference, that is all the pages are needed to be loaded from the secondary memory. This results in excessive page operations and ultimately results in thrashing.

3.

Detection of thrashing:

• Thrashing can be detected by either a halted system due to dead lack of the page replacement algorithms or by a very low system with low responsibility.
• The excessive paging operating results in less process usage and also some times the system even crash since there will not be sufficient memory to perform the activities properly.

4.

To eliminate thrashing:

• Increase the primary memory available.
• Decrease the number of process that can be run simultaneously in the system.
• Swap file and page size should be adjusted to eliminate thrashing.