Parameter Sensitive Plan Optimization

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Exploring Parameter Sensitive Plan Optimization in SQL Server 2022

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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.

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2023-07-21

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Question of the Day

Symmetric Key Encryption

If I run this statement in SQL Server 2025, how is the password encrypted? 

CREATE SYMMETRIC KEY MySymmetricKey
WITH ALGORITHM = AES_256,
KEY_SOURCE = 'My secret key source passphrase',
IDENTITY_VALUE = 'My secret identity value'
ENCRYPTION BY PASSWORD = 'S&perS#cretP@ssword7';
GO

See possible answers