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Merge pull request #26122 from thesqlsith/patch-3
Update parameter-sensitive-plan-optimization.md
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docs/relational-databases/performance/parameter-sensitive-plan-optimization.md

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@@ -334,7 +334,7 @@ You can influence the current skewness thresholds used by the PSP optimization f
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- Cardinality estimator (CE) trace flags, such as [Trace Flag 9481](../../t-sql/database-console-commands/dbcc-traceon-trace-flags-transact-sql.md#tf9481) (global, session, or query level)
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- [Database scoped configuration](../../t-sql/statements/alter-database-scoped-configuration-transact-sql.md#legacy_cardinality_estimation---on--off--primary-) options that attempt to lower the CE model in use, or influence the assumptions that the CE model makes in regards to the independence of multiple predicates. This is especially useful in cases where multi-column statistics don't exist, which affects PSP optimization's ability to evaluate the candidacy of those predicates.
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For more information, see the *Increased Correlation Assumption for Multiple Predicates* section of the [Optimizing your query plans with the SQL Server 2014 Cardinality Estimator](/previous-versions/dn673537(v=msdn.10)?redirectedfrom=MSDN) whitepaper. The newer CE model attempts to assume some correlation and less independence for the conjunction and disjunction of predicates. Using the legacy CE model can affect how selectivity of the predicates in a multi-column join scenario can be calculated. This action should only be considered for specific scenarios and it is not generally recommended to use the legacy the CE model for most workloads.
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For more information, see the *Increased Correlation Assumption for Multiple Predicates* section of the [Optimizing your query plans with the SQL Server 2014 Cardinality Estimator](/previous-versions/dn673537(v=msdn.10)?redirectedfrom=MSDN) whitepaper. The newer CE model attempts to assume some correlation and less independence for the conjunction and disjunction of predicates. Using the legacy CE model can affect how selectivity of the predicates in a multi-column join scenario can be calculated. This action should only be considered for specific scenarios and it is not generally recommended to use the legacy CE model for most workloads.
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## See also
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