Month: November 2016

Misconceptions on parameter sniffing

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In my previous post, I explained the basic of parameter sniffing, and then built on that to explain the lesser known mechanics of variable sniffing and cardinality sniffing. However, I also sneakily inserted a few comments on misconceptions about the performance impact of parameter sniffing, with the promise to explain in more detail later. Well … it is later now, so here is the promised explanation! Parameter sniffing’s bad rep Lots of people in the SQL Server field will claim that parameter sniffing is a bad feature. That is not the case. Just think about it for a moment –…
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