See how SQL Server's Parameter Sensitive Plan optimization handles skewed parameters, how to verify dispatcher plans, and where PSP still falls short.
2026-09-04
1,853 reads
PSPO (Parameter Sensitive Plan Optimization) is a SQL Server feature that improves query performance by accepting varied data sizes based on the runtime parameter value(s) specified by the customer. It deals with the situation in which a single cached plan for a parameterized query isn't the best option for all potential incoming parameter values. Non-uniform data distributions exhibit this phenomenon. When using PSPO, SQL Server keeps several execution plans for a single query, each one customized for a particular parameter value. With the help of this feature, numerous execution plans for a parameterized query are generated, each of which is tailored for a certain range of parameter values.
2023-07-21
4,822 reads
By Steve Jones
“A multitude of bad ideas is necessary for one good idea” – from Excellent...
By James Serra
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Redshift keeps its SYS_* monitoring views for seven days in cluster, which is fine...
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What types of secondary replicas are available for the Azure SQL Database Hyperscale edition?
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