As stated above, performance is the major concern in query tuning.
如上所述，性能是查询调优中主要关心的问题。
Those familiar with System I and database query performance analysis and tuning, understand that controlling the optimization goal is a critical step to optimizing performance.
那些熟悉system i和数据库查询性能分析和调优的人就会理解控制优化目标是优化性能的关键步骤。
This section focuses on tuning query performance for federated systems. Before tuning query performance
本节主要关注联邦系统中查询性能的调优。
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