Month: October 2016

The sniffing database

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Your SQL Server instances, like people with hay fever that forget to take their antihistamines during summer, is sniffing all the time. Sniffing is a trick employed by the optimizer in an attempt to give you better execution plans. The most common form of sniffing is parameter sniffing. Many people know about parameter sniffing, but there are a lot of misconceptions about this subject. I have heard people describe parameter sniffing as a bad thing, and I know people who claim that parameter sniffing is mostly good with some exceptions that they then call “bad parameter sniffing”. Neither of these…
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