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Module 5: Memory Management

20235m

What is thrashing. Explain the main cause of thrashing. How can we limit the effects of thrashing.

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Thrashing

Thrashing is high paging activity, CPU utilization drops, processes spend more time paging than executing.
Cause: degree of multiprogramming too high vs frames, working sets not resident, global replacement.
Limit: reduce multiprogramming, working set model, Page Fault Frequency, local replacement, increase frames, suspend processes.

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