How does LINQ interact with database query plan parameter sniffing issues?
Updated May 16, 2026
Short answer
LINQ indirectly triggers parameter sniffing when translated SQL is reused with different parameter distributions.
Deep explanation
Database engines like SQL Server cache execution plans based on first parameter values. LINQ-generated queries often reuse the same SQL structure with different parameters. If the initial plan is optimized for atypical data distribution, subsequent executions suffer performance degradation. This is known as parameter sniffing.
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