突破200大关时，仿佛听到棘轮咔嗒作响。代码库更新节奏加快，更多硬件软件项目开始使用数据集。
confirms: replace them with arbitrary data in assembly, then verify program
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Same applies to debugging. A query is slow in production and you want to reproduce the plan locally, but your database has different statistics, and planner chooses the predictable path. Porting production stats can provide you that snapshot of thinking planner has to do in production, without actually going to production.
Изображение: Thierry Roge / Reuters
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