Explain why the following technique for transaction execution may providebetter performance than just using strict two-phase locking: First execute thetransaction without acquiring any locks and without performing any writesto the database as in the validation-based techniques, but unlike the validationtechniques do not perform either validation or writes on the database. Instead,rerun the transaction using strict two-phase locking. (Hint: Consider waits fordisk I/O.)
Explain why the following technique for transaction execution may providebetter performance than just using strict two-phase locking: First execute thetransaction without acquiring any locks and without performing any writesto the database as in the validation-based techniques, but unlike the validationtechniques do not perform either validation or writes on the database. Instead,rerun the transaction using strict two-phase locking. (Hint: Consider waits fordisk I/O.)
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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| Explain why the following technique for transaction execution may provide better performance than just using strict two-phase locking: First execute the transaction without acquiring any locks and without performing any writes to the techniques do not perform either validation or writes on the database. Instead, rerun the transaction using strict two-phase locking. (Hint: Consider waits for disk I/O.) |
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