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- W2135176904 abstract "The authors (1990) have shown that in real-time database systems that discard late transactions, optimistic concurrency control outperforms locking. Although the optimistic algorithm used in that study, OPT-BC, did not factor in transaction deadlines in making data conflict resolution decisions, it still outperformed a deadline-cognizant locking algorithm. A discussion is presented of why adding deadline information to optimistic algorithms is a nontrivial problem, and some alternative methods of doing so are described. A new real-time optimistic concurrency control algorithm, WAIT-50, is presented that monitors transaction conflict states and gives precedence to urgent transactions in a controlled manner. WAIT-50 is shown to provide significant performance gains over OPT-BC under a variety of operating conditions and workloads.< <ETX xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>></ETX>" @default.
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- W2135176904 date "1990-01-01" @default.
- W2135176904 modified "2023-09-23" @default.
- W2135176904 title "Dynamic real-time optimistic concurrency control" @default.
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- W2135176904 doi "https://doi.org/10.1109/real.1990.128734" @default.
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