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  • Query Store - Forced Doesn’t Always Mean Forced

      The new Query Store feature in SQL Server 2016 is a great new addition that we have been anticipating for many years now. There are already a bunch of articles out there that explain what it is even how to go about using it so I won’t repeat that here. However there is one aspect of the feature that has been poorly documented and even a ...
    Posted to Andrew Kelly (Weblog) by Andrew Kelly on September 18, 2016
  • SQLSentry does it Again – Plan Explorer is Completely Free

     Many of us have used the free version of Plan Explorer from SQLSentry for a long time to help tune and explore query plans in a way that SSMS can only dream of. Unlike most free tools this one still had plenty of useful features that served the community well. The Pro version did however contain a bunch of great features that many ...
    Posted to Andrew Kelly (Weblog) by Andrew Kelly on September 8, 2016
  • Compute Scalars, Expressions and Execution Plan Performance

    The humble Compute Scalar is one of the least well-understood of the execution plan operators, and usually the last place people look for query performance problems.  It often appears in execution plans with a very low (or even zero) cost, which goes some way to explaining why people ignore it. Some readers will already know that a Compute ...
    Posted to Page Free Space (Weblog) by Paul White on September 4, 2012
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