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Asked: 2026-06-05T10:06:09+00:00

Update: I’ve created a suggestion to implement hint control in a future version of

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Update: I’ve created a suggestion to implement hint control in a future version of EF. Go here to vote for it.

I have a problem where one of my Entity Framework (EF) queries is taking a very long time to execute in Sql Server, although when I copy-and-paste the generated TSQL into Sql Server Management Studio (SSMS) it runs extremely fast. After some investigation I found that I was experiencing a parameter sniffing issue, and the correct way to fix it is to insert one of many query hints (OPTIMIZE FOR, RECOMPILE, and so on). How do I insert these hints into my EF queries?

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  1. Editorial Team

    To apply a hint on a query generate by EF, you should use plan guides, more info here: One to one join Not fast enough in SQL Server

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