Investigating Eager Spooling

Erik Darling takes us through a couple of scenarios with eager spooling:

I wanted to show you two situations with two different kinds of spools, and how they differ with the amount of work they do.

I’ll also show you how you can tell the difference between the two.

Click through to learn more about why Erik’s queries generate spools and what that means for you.

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Getting the Last Actual Plan

Grant Fritchey shows off an improvement in SQL Server 2019: I’ve always felt responsible for making such a big deal about the differences between estimated and actual plans. I implied in the first edition of the execution plans book (get the new, vastly improved, 3rd edition in digital form for free here, or you can pay for […]

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Execution Plan Properties

Erik Darling reminds you to check out the properties of execution plan elements: I read a lot of posts about query plans, and I rarely see people bring up the properties tab. And I get it. The F4 button is right next to the F5 button. If you hit the wrong one, you might ruin […]

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