Representative statistics can be gathered in non-peak hours, one simply has to plan for the different volumes involved.

有些情况下没有统计信息会产生好的，但是大部分情况是，收集统计信息比没有统计信息更能产生好的执行计划。

youdao

The suggestion here from Skipping Stone is to define on-peak as a specific number of hours Monday-Friday (non holiday).

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