LFU-K: An effective buffer management replacement algorithm

Abstract. This paper introduces a new approach to database disk buffering, called the LFU-K method. The LFU-K page replacement algorithm is an im-provement to the Least Frequently Used (LFU) algorithm. The paper proposes a theoretical-probability model for formal description of LFU-K algorithm. Us-ing 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 da-tabase systems.