Consider the buffer replacement policies: 'Most Recently Used' and 'First in First Out': i. Construct an example (sequence of read or write requests) that, for the same query set, the 'First in First Out’ buffer replacement policy performs the worst with one buffer size and performs the best with another buffer size. Justify your answer and explain why if it does not exist.

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
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5ddd

(d)
Consider the buffer replacement policies: 'Most Recently Used' and 'First
in First Out':
i. Construct an example (sequence of read or write requests) that, for the same
query set, the 'First in First Out’ buffer replacement policy performs the worst
with one buffer size and performs the best with another buffer size. Justify
your answer and explain why if it does not exist.
Transcribed Image Text:(d) Consider the buffer replacement policies: 'Most Recently Used' and 'First in First Out': i. Construct an example (sequence of read or write requests) that, for the same query set, the 'First in First Out’ buffer replacement policy performs the worst with one buffer size and performs the best with another buffer size. Justify your answer and explain why if it does not exist.
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