EchoFlow: A Workload-Aware Parameter Tuning Method for Blockchain Systems

Abstract

Blockchain systems expose a large number of tunable parameters that significantly influence system performance. However, in practice, a single parameter configuration is often applied across different workloads, leaving substantial unexploited performance potential. To address this, we propose EchoFlow, a blockchain parameter tuning framework that adaptively adjusts parameter configurations based on workload characteristics, enabling continuous performance optimization. EchoFlow employs a distributed reinforcement learning approach in which multiple actors perform parallel sampling to mitigate the substantial time required for sample generation in blockchain environments. To further accelerate convergence, we introduce a genetic algorithm during the initial phase of training to generate high-quality samples. Extensive experimental evaluations demonstrate that EchoFlow consistently outperforms existing methods across diverse workload scenarios while also reducing training time, highlighting its effectiveness and practical value.

Preprint, 14-page full paper; accepted for presentation at BlockSys'2026 (The 8th International Conference on Blockchain, Artificial Intelligence, and Trustworthy Systems). Conference website: https://www.aischolar.com/conference/blocksys2026