When the actual IO statistics seem wrong
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I recently wrote about the Actual I/O Statistics property that you can find in an execution plan plus run-time statistics, which allows you to see exactly how much I/O was done by each individual operator. This is a great feature and I’m very happy with it. But, as I already indicated at the end of that post, there are some issues as well. Let’s take a look at the dark side of this property. Error, does not compute So, let’s look at an example, based on this simple query: SET STATISTICS IO ON; SELECT sod.OrderQty, sod.UnitPrice FROM Sales.SalesOrderDetail AS sod…
