A flexible mechanism for concurrency control in database systems

Abstract

One of the areas to which a great amount of research has been devoted in recent years in concerned with the concurrency control problem in a multi-user database system. Despite the great number of new algoritms, none of them so far could actualy claim to work best in all types of applications. This article addresses this issue and suggests a more flexible approach to the design of concurrency control mechanisms in database systems. This proposed flexibility attempts to improve the performanceof the sistem in a number of situations where the strictiness of most mechanisms makes it difficult to achieve.