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MCTuner: Spatial Decomposition-Enhanced Database Tuning via LLM-Guided Exploration

Summary: MCTuner uses a Mixture-of-Experts of LLMs to pinpoint performance‑critical knobs and avoid ineffective regions in high‑dimensional config spaces. Its recursive spatial decomposition runs Bayesian optimization on hierarchical subspaces, yielding up to 19.2% gains and 1.4× faster discovery versus SOTA. (summarized by gpt-5-mini on Feb 11 2026)

Paper ID
7404
Venue
SIGMOD
Year
2026
Pagerank
4.1905499e-05
Overall Rank
10,093 | 29.86%
DOI
10.1145/3769807

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

Rank Cited Paper Year Venue Pagerank
71 How Good Are Query Optimizers, Really? 2016 VLDB 0.00059446482
183 Automatic Database Management System Tuning Through Large-scale Machine Learning 2017 SIGMOD 0.00036859633
339 OLTP-Bench: An Extensible Testbed for Benchmarking Relational Databases 2014 VLDB 0.00026895683
423 Tuning Database Configuration Parameters with iTuned 2009 VLDB 0.00023628474
510 An End-to-End Automatic Cloud Database Tuning System Using Deep Reinforcement Learning 2019 SIGMOD 0.00021420477
779 QTune: A Query-Aware Database Tuning System with Deep Reinforcement Learning 2019 VLDB 0.00016719473
998 CodeS: Towards Building Open-source Language Models for Text-to-SQL 2024 SIGMOD 0.00014726344
1,404 DB-BERT: A Database Tuning Tool that "Reads the Manual" 2022 SIGMOD 0.00012179714
1,631 CodexDB: Synthesizing Code for Query Processing from Natural Language Instructions using GPT-3 Codex 2022 VLDB 0.00011071662
1,810 SQL Memory Management in Oracle9i 2002 VLDB 0.00010471365
1,816 An Inquiry into Machine Learning-based Automatic Configuration Tuning Services on Real-World Database Management Systems 2021 VLDB 0.00010438512
1,892 Black or White? How to Develop an AutoTuner for Memory-based Analytics 2020 SIGMOD 0.00010176219
1,953 D-Bot: Database Diagnosis System using Large Language Models 2024 VLDB 9.9701097e-05
3,105 GPTuner: A Manual-Reading Database Tuning System via GPT-Guided Bayesian Optimization 2024 VLDB 7.5567226e-05
3,465 LLM-R2: A Large Language Model Enhanced Rule-based Rewrite System for Boosting Query Efficiency 2025 VLDB 7.0668293e-05
3,655 Facilitating Database Tuning with Hyper-Parameter Optimization: A Comprehensive Experimental Evaluation 2022 VLDB 6.8723042e-05
3,666 The Dawn of Natural Language to SQL: Are We Fully Ready? 2024 VLDB 6.8606092e-05
3,995 ResTune: Resource Oriented Tuning Boosted by Meta-Learning for Cloud Databases 2021 SIGMOD 6.5475871e-05
4,180 LlamaTune: Sample-Efficient DBMS Configuration Tuning 2022 VLDB 6.3725334e-05
4,234 Panda: Performance Debugging for Databases using LLM Agents 2024 CIDR 6.3300159e-05
4,235 CGPTuner: a Contextual Gaussian Process Bandit Approach for the Automatic Tuning of IT Configurations Under Varying Workload Conditions 2021 VLDB 6.3297728e-05
4,377 HUNTER: An Online Cloud Database Hybrid Tuning System for Personalized Requirements 2022 SIGMOD 6.2331947e-05
4,730 UDO: Universal Database Optimization using Reinforcement Learning 2021 VLDB 5.9604983e-05
4,799 Towards Dynamic and Safe Configuration Tuning for Cloud Databases 2022 SIGMOD 5.9082876e-05
5,834 An Efficient Transfer Learning Based Configuration Adviser for Database Tuning 2024 VLDB 5.3082111e-05
6,753 Breaking It Down: An In-depth Study of Index Advisors 2024 VLDB 4.9345582e-05
7,030 R-Bot: An LLM-based Query Rewrite System 2025 VLDB 4.8518029e-05
7,676 E2ETune: End-to-End Knob Tuning via Fine-tuned Generative Language Model 2025 VLDB 4.6770108e-05
7,993 RCRank: Multimodal Ranking of Root Causes of Slow Queries in Cloud Database Systems 2025 VLDB 4.6080455e-05
9,282 DBG-PT: A Large Language Model Assisted Query Performance Regression Debugger 2024 VLDB 4.3598981e-05
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