2004 | OriginalPaper | Buchkapitel
LFU-K: An Effective Buffer Management Replacement Algorithm
verfasst von : Leonid B. Sokolinsky
Erschienen in: Database Systems for Advanced Applications
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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This paper introduces a new approach to database disk buffering, called the LFU-K method. The LFU-K page replacement algorithm is an improvement to the Least Frequently Used (LFU) algorithm. The paper proposes a theoretical-probability model for formal description of LFU-K algorithm. Using this model we evaluate estimations for the LFU-K parameters. This paper also describes an implementation of LFU-2 policy. As we demonstrate by trace-driven simulation experiments, the LFU-2 algorithm provides significant improvement over conventional buffering algorithms for the shared-nothing database systems.