DRL-Clusters: Buffer Management with Clustering based Deep Reinforcement LearningDownload PDF

Oct 03, 2021 (edited Oct 22, 2021)DBAIReaders: Everyone
  • Keywords: Buffer pool management, cache replacement, machine learning, deep learning, deep reinforcement learning, clustering
  • TL;DR: This paper proposes a deep reinforcement learning-based approach, DRL-Clusters, to manage the buffer pool for database systems when handling changing workloads.
  • Abstract: Buffer cache has been widely implemented in database systems to reduce disk I/Os. Existing database systems typically use heuristic-based algorithms for buffer replacement, which cannot dynamically adapt to changing workload patterns. This paper proposes a deep reinforcement learning-based approach, DRL-Clusters, to manage the buffer pool when handling changing workloads. DRL-Clusters can dynamically adapt to different workload patterns without incurring high inference overhead and miss ratio with page re-clustering and continuous interactions with the cache environment. Our evaluation results demonstrate that DRL-Clusters can achieve a lower or comparable miss ratio than the heuristic policies while reducing 13.3% - 26.8% page access overhead under changing workloads.
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