NDLI: Efficient Execution of Multiple Queries on Deep Memory Hierarchy

Content Provider	Springer Nature Link
Author	Zhang, Yan Chen, Zhi Feng Zhou, Yuan Yuan
Copyright Year	2007
Abstract	This paper proposes a complementary novel idea, called MiniTasking to further reduce the number of cache misses by improving the data temporal locality for multiple concurrent queries. Our idea is based on the observation that, in many workloads such as decision support systems (DSS), there is usually significant amount of data sharing among different concurrent queries. MiniTasking exploits such data sharing to improve data temporal locality by scheduling query execution at three levels: query level batching, operator level grouping and mini-task level scheduling. The experimental results with various types of concurrent TPC-H query workloads show that, with the traditional N-ary Storage Model (NSM) layout, MiniTasking significantly reduces the L2 cache misses by up to 83, and thereby achieves 24% reduction in execution time. With the Partition Attributes Across (PAX) layout, MiniTasking further reduces the cache misses by 65% and the execution time by 9%. For the TPC-H throughput test workload, MiniTasking improves the end performance up to 20%.
Starting Page	273
Ending Page	279
Page Count	7
File Format	PDF
ISSN	10009000
Journal	Journal of Computer Science and Technology
Volume Number	22
Issue Number	2
e-ISSN	18604749
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2007-04-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	cache performance temporal locality mini-task scheduling concurrent queries Computer Science Software Engineering Theory of Computation Data Structures, Cryptology and Information Theory Artificial Intelligence (incl. Robotics) Information Systems Applications (incl.Internet)
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Computational Theory and Mathematics Computer Science Applications Software Hardware and Architecture

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