NDLI: A mean value performance model for locking in databases: the waiting case

Content Provider	ACM Digital Library
Author	Tay, Y. C. Suri, R. Goodman, N.
Abstract	An earlier paper introduced a simple performance model for studying the behaviour of locking. That paper treats a highly simplified form of locking, called the no waiting case, in which transactions restart when they request locks that are already held by others. This analysis is now extended to the more realistic waiting case, in which transactions are allowed to wait for conflicting locks, and restart only if there is a deadlock. The analysis begins with a system that has uniform access and exclusive locks only. The model's predictions for this base system agree well with simulation results. Next, a system with nonuniform access and another with shareable locks are each shown to be reducible to the base system. A comparison of the waiting and no waiting cases yields a surprising result: the throughput for the no waiting case is often better than for the waiting case, and never much worse.
Starting Page	311
Ending Page	322
Page Count	12
File Format	PDF
ISBN	0897911288
DOI	10.1145/588011.588056
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1984-04-02
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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A mean value performance model for locking in databases: the waiting case