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Incomplete Execution Plan Wait Stats

Brent Ozar has found an issue with query-level wait stats in SQL Server 2016 SP1:

That sounds amazing! Our server only had 609 milliseconds of wait time altogether, none of which was spent waiting on storage! Our storage must be super-blazing fast, and there’s practically no way to tune it to wait less than 609 milliseconds, right?

Spoilers:  it’s not that fast.