[Podcast] The Brain Inside Your Database
Автор: Vinh Nguyen
Загружено: 2026-01-09
Просмотров: 16
Описание:
https://arxiv.org/pdf/2101.01507
This paper provides a comprehensive survey of modern database query optimizers, focusing on the three essential pillars of cardinality estimation, cost modeling, and plan enumeration. The authors analyze why traditional cost-based systems often struggle with complex queries, citing issues like error propagation in multi-join scenarios and the exponential search space of join orders. To address these limitations, the text categorizes various advancements into synopsis-based, sampling-based, and learning-based methodologies. Special attention is given to the rise of machine learning and reinforcement learning as transformative tools for predicting query performance and automating optimization logic. Ultimately, the sources highlight a significant shift toward data-driven models while outlining remaining challenges such as high training overhead and adapting to dynamic workloads.
Disclaimer: This video is generated with Google's NotebookLM.
#research #database
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