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: hb79a83ff31ab2cae
Venue: SIGMOD
Year: 2021
Pagerank: 5.5308106e-05
Overall Rank: 7,347 | 50.76%
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
4,797	LSched: A Workload-Aware Learned Query Scheduler for Analytical Database Systems	2022	SIGMOD	6.3978116e-05
4,999	Using Cloud Functions as Accelerator for Elastic Data Analytics	2023	SIGMOD	6.3086259e-05
5,794	Lemo: A Cache-Enhanced Learned Optimizer for Concurrent Queries	2023	SIGMOD	5.9759435e-05
6,812	dbET: Execution Time Distribution-based Plan Selection	2023	SIGMOD	5.6597129e-05
11,519	Oligolithic Cross-task Optimizations across Isolated Workloads*	2024	CIDR	4.9605343e-05
11,766	QaaD (Query-as-a-Data): Scalable Execution of Massive Number of Small Queries in Spark	2023	SIGMOD	4.9605343e-05
11,777	SH2O: Efficient Data Access for Work-Sharing Databases	2023	SIGMOD	4.9605343e-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
15	How Good Are Query Optimizers, Really?	2016	VLDB	0.00061463175
48	Weaving Relations for Cache Performance	2001	VLDB	0.00043770511
53	Eddies: Continuously Adaptive Query Processing	2000	SIGMOD	0.00040739114
84	Learned Cardinalities: Estimating Correlated Joins with Deep Learning	2019	CIDR	0.00035920657
129	Efficient and Extensible Algorithms for Multi Query Optimization	2000	SIGMOD	0.00030314403
135	Ripple Joins for Online Aggregation	1999	SIGMOD	0.00029805026
142	Neo: A Learned Query Optimizer	2019	VLDB	0.00029114937
201	Continuously Adaptive Continuous Queries over Streams	2002	SIGMOD	0.00025363666
390	QPipe: A Simultaneously Pipelined Relational Query Engine	2005	SIGMOD	0.00019232929
405	Deep Unsupervised Cardinality Estimation	2020	VLDB	0.00019020138
473	The Making of TPC-DS	2006	VLDB	0.00017656775
670	SharedDB: Killing One Thousand Queries With One Stone	2012	VLDB	0.00014929358
690	Selectivity Estimation for Range Predicates using Lightweight Models	2019	VLDB	0.00014703258
768	Cooperative Scans: Dynamic Bandwidth Sharing in a DBMS	2007	VLDB	0.00014096379
824	Adaptive Ordering of Pipelined Stream Filters	2004	SIGMOD	0.0001360282
833	Pipelining in Multi-Query Optimization	2001	PODS	0.00013541546
1,029	A Scalable, Predictable Join Operator for Highly Concurrent Data Warehouses	2009	VLDB	0.00012380835
1,043	The DataPath System: A Data-Centric Analytic Processing Engine for Large Data Warehouses	2010	SIGMOD	0.00012325755
1,109	Maximizing the Output Rate of Multi-Way Join Queries over Streaming Information Sources	2003	VLDB	0.00011949421
1,137	Efficient Exploitation of Similar Subexpressions for Query Processing	2007	SIGMOD	0.00011856159
1,387	Procella: Unifying serving and analytical data at YouTube	2019	VLDB	0.0001080904
1,757	Selecting Subexpressions to Materialize at Datacenter Scale	2018	VLDB	9.7050769e-05
2,237	Shared Workload Optimization	2014	VLDB	8.7777395e-05
2,731	TPC-DS, Taking Decision Support Benchmarking to the Next Level	2002	SIGMOD	8.0676575e-05
4,082	The Case for Precision Sharing	2004	VLDB	6.8010384e-05
4,394	Lifting the Burden of History from Adaptive Query Processing	2004	VLDB	6.6084598e-05
4,751	MQJoin: Efficient Shared Execution of Main-Memory Joins	2016	VLDB	6.42279e-05

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