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Published Articles >> Table of Contents >> Abstract
March 2004 (Vol. 53, No. 3)
pp. 308-319
A General Stochastic Model for Dynamic Locking in Database Systems
Yong Jiang, IEEE
Jie Li, IEEE
Shoichi Nishimura
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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TC.2004.1261837
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In this paper, we present a novel stochastic model to study the performances of the two-phase dynamic locking in database systems with no-waiting policy. It is a general stochastic model to describe the database environment and transaction states in detail. It deals with the nonuniform access, write-locking, read-locking, and multiple transaction classes in a unique way. In the analysis, we first solve the steady-state probability of the system. Then, we give the mean number of transactions with k locks, the mean total number of locks held by all transactions, the mean number of data granules locked by a transaction, the mean number of writelocks and readlocks held by a transaction, and the mean number of locked data granules in a database. These parameters provide more insight into the detailed behavior of transactions and database systems. Finally, we calculate the system throughput and restart rate, which are the two principal performance measures.
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 Additional Information
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Index Terms- Concurrency control, database systems, modeling, performance, simulation, stochastic analysis, transaction processing, two-phase dynamic locking.
Citation:
Yong Jiang, Jie Li, Shoichi Nishimura,
"A General Stochastic Model for Dynamic Locking in Database Systems,"
IEEE Transactions on Computers,
vol. 53,
no. 3,
pp. 308-319,
Mar.,
2004
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