With approach 1, the simplest approach to eliminating the hold-and-wait condition, process p must request all resources at the time when the first resource is needed and then release each resource when no longer needed. The table below shows when each resource is first needed (start) and when each resource may be released (end). Start End r1 8 10 r2 9 13 r3 2 7 For each resource, determine the total time the resource is unavailable (Total) and the time each resource is unavailable even though process p is not using the resource (Wasted). Total Wasted r1 r2 Ex: 4

With approach 1, the simplest approach to eliminating the hold-and-wait condition, process p must request all resources at the time when the first resource is needed and then release each resource when no longer needed. The table below shows when each resource is first needed (start) and when each resource may be released (end). Start End r1 8 10 r2 9 13 r3 2 7 For each resource, determine the total time the resource is unavailable (Total) and the time each resource is unavailable even though process p is not using the resource (Wasted). Total Wasted r1 r2 Ex: 4

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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Question

5.4.1 CompSci - Need assistance with this problem please - thank you in advance!

With approach 1, the simplest approach to eliminating the hold-and-wait condition, process p must request all
resources at the time when the first resource is needed and then release each resource when no longer needed.
The table below shows when each resource is first needed (start) and when each resource may be released (end).
Start
End
r1
8
10
r2
9
13
r3
2
7
For each resource, determine the total time the resource is unavailable (Total) and the time each resource is
unavailable even though process p is not using the resource (Wasted).
Total
r1
r2
r3
Ex: 4
Wasted

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