Scalable Multi-Query Execution using Reinforcement Learning

Summary: RouLette uses reinforcement learning to drive adaptive, runtime sharing for multi-query execution, avoiding costly pre-optimization. It delivers 1.6–28.3× throughput gains vs a query-at-a-time engine and up to 6.5× vs sharing prototypes on TPC-DS-like workloads. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID: 6142
Venue: SIGMOD
Year: 2021
Pagerank: 5.670422e-05
Overall Rank: 7,213 | 50.52%
DOI: 10.1145/3448016.3452799

Incoming Non-self Citations Over Time

Authors

1. Panagiotis Sioulas (EPFL)
2. Anastasia Ailamaki (EPFL; RAW Labs)

BibTeX Citation

@inproceedings{sioulas_sigmod21,
        title = {{Scalable Multi-Query Execution using Reinforcement Learning}},
        author = {Sioulas, Panagiotis and Ailamaki, Anastasia},
        series = {{SIGMOD} '21},
        booktitle = {Proceedings of the {ACM} {SIGMOD} International Conference on Management of Data},
        publisher = {Association for Computing Machinery},
        doi = {10.1145/3448016.3452799},
        url = {https://dl.acm.org/doi/10.1145/3448016.3452799},
        year = {2021}
}

Incoming Citations (Sorted by Pagerank)

Showing 7 of 7 citing papers.

Rank	Citing Paper	Year	Venue	Pagerank
4,908	Using Cloud Functions as Accelerator for Elastic Data Analytics	2023	SIGMOD	6.4488784e-05
5,148	LSched: A Workload-Aware Learned Query Scheduler for Analytical Database Systems	2022	SIGMOD	6.3465986e-05
5,701	Lemo: A Cache-Enhanced Learned Optimizer for Concurrent Queries	2023	SIGMOD	6.1167049e-05
7,193	dbET: Execution Time Distribution-based Plan Selection	2023	SIGMOD	5.6770249e-05
11,113	Oligolithic Cross-task Optimizations across Isolated Workloads*	2024	CIDR	5.093636e-05
11,399	QaaD (Query-as-a-Data): Scalable Execution of Massive Number of Small Queries in Spark	2023	SIGMOD	5.093636e-05
11,413	SH2O: Efficient Data Access for Work-Sharing Databases	2023	SIGMOD	5.093636e-05

Outgoing Citations (Sorted by Pagerank)

Showing 27 of 27 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank	Cited Paper	Year	Venue	Pagerank
18	How Good Are Query Optimizers, Really?	2016	VLDB	0.00059284255
49	Weaving Relations for Cache Performance	2001	VLDB	0.00043781096
53	Eddies: Continuously Adaptive Query Processing	2000	SIGMOD	0.00041071971
84	Learned Cardinalities: Estimating Correlated Joins with Deep Learning	2019	CIDR	0.00035838391
128	Efficient and Extensible Algorithms for Multi Query Optimization	2000	SIGMOD	0.0003072825
131	Ripple Joins for Online Aggregation	1999	SIGMOD	0.00030424509
154	Neo: A Learned Query Optimizer	2019	VLDB	0.00028726181
193	Continuously Adaptive Continuous Queries over Streams	2002	SIGMOD	0.00025964286
383	QPipe: A Simultaneously Pipelined Relational Query Engine	2005	SIGMOD	0.00019520728
401	Deep Unsupervised Cardinality Estimation	2020	VLDB	0.00019092557
476	The Making of TPC-DS	2006	VLDB	0.00017860667
670	SharedDB: Killing One Thousand Queries With One Stone	2012	VLDB	0.00015157572
697	Selectivity Estimation for Range Predicates using Lightweight Models	2019	VLDB	0.00014888851
761	Cooperative Scans: Dynamic Bandwidth Sharing in a DBMS	2007	VLDB	0.00014254351
813	Adaptive Ordering of Pipelined Stream Filters	2004	SIGMOD	0.00013846487
822	Pipelining in Multi-Query Optimization	2001	PODS	0.00013807229
1,022	A Scalable, Predictable Join Operator for Highly Concurrent Data Warehouses	2009	VLDB	0.00012602841
1,024	The DataPath System: A Data-Centric Analytic Processing Engine for Large Data Warehouses	2010	SIGMOD	0.0001258839
1,093	Maximizing the Output Rate of Multi-Way Join Queries over Streaming Information Sources	2003	VLDB	0.00012218435
1,154	Efficient Exploitation of Similar Subexpressions for Query Processing	2007	SIGMOD	0.00011934202
1,494	Procella: Unifying serving and analytical data at YouTube	2019	VLDB	0.00010577585
1,765	Selecting Subexpressions to Materialize at Datacenter Scale	2018	VLDB	9.8079546e-05
2,276	Shared Workload Optimization	2014	VLDB	8.8196376e-05
2,726	TPC-DS, Taking Decision Support Benchmarking to the Next Level	2002	SIGMOD	8.203274e-05
3,978	The Case for Precision Sharing	2004	VLDB	6.9771565e-05
4,283	Lifting the Burden of History from Adaptive Query Processing	2004	VLDB	6.7836167e-05
4,639	MQJoin: Efficient Shared Execution of Main-Memory Joins	2016	VLDB	6.5918791e-05

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