A key to the performance of the VSWS resident set management policy is the value of Q. Experience has shown that, with a fixed value of Q for a process, there are con- siderable differences in page fault frequencies at various stages of execution. Further- more, if a single value of Q is used for different processes, dramatically different frequencies of page faults occur. These differences strongly indicate that a mechanism that would dynamically adjust the value of Q during the lifetime of a process would improve the behavior of the algorithm. Suggest a simple mechanism for this purpose.

A key to the performance of the VSWS resident set management policy is the value of Q. Experience has shown that, with a fixed value of Q for a process, there are con- siderable differences in page fault frequencies at various stages of execution. Further- more, if a single value of Q is used for different processes, dramatically different frequencies of page faults occur. These differences strongly indicate that a mechanism that would dynamically adjust the value of Q during the lifetime of a process would improve the behavior of the algorithm. Suggest a simple mechanism for this purpose.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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