Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Chapter 19, Problem 2PE
Explanation of Solution
Purpose of checkpoint
- Checkpoint is usually performed in conjunction with the log-based recovery system when a system crash occurs.
- In transactions which used checkpoints, all the modified buffer blocks till the checkpoint are written to the disk.
- Checkpoints reduce the recovery time of a system after a crash.
- When checkpointing is performed and a system crashes, then the modified buffer blocks till the checkpoint have been written to the disk...
Explanation of Solution
Performing checkpoints:
The frequency of performing checkpoints depends upon the requirements and resources of the system.
- The frequency of checkpoints is reduced when fast recovery is not critical to the system since the...
Explanation of Solution
Affecting the frequency of checkpoints:
- The frequency of checkpoints must be also as less as checkpoints when no failure occurs in a system since it causes some performance loss while they are being taken...
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