Parameter Sniffing on SQL Server 2025: A Walkthrough with Real Numbers
This article looks at how the parameter sniffing performance problem can be helped in SQL Server 2025 with PSPO.
2026-09-28
1,936 reads
Parameter Sensitive Plan Optimization
Optional Parameter Plan Optimization in SQL Server 2025: Fixing the Kitchen-Sink Search Procedure
See how SQL Server 2025 uses Optional Parameter Plan Optimization to create separate plans for selective and unfiltered searches, how to verify the dispatcher and variants, and when dynamic SQL or recompilation is still the better choice.
2026-09-14
2,348 reads
Exploring Parameter Sensitive Plan Optimization in SQL Server 2022
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
4,872 reads
Blogs
Flyway Tips: Object History
By Steve Jones
It’s a small change, but a handy one. Flyway Desktop (FWD) now includes the...
Car Update September 2026
By Steve Jones
Software is hard. While I love our Lucid Gravity, I realize that they are...
Microsoft Tools for Making Data AI-Ready
By James Serra
Making Data AI-Ready, Part 2 (This is the second article in a three-part series...
Forums
Looking for old SQL Server 1.x - 4.21 disks, manuals, boxes, etc.
Hi everyone, I'm hoping some of the longtime SQL Server professionals here might be...
Checking the Error Log II
Comments posted to this topic are about the item Checking the Error Log II
Parameter Sniffing on SQL Server 2025: A Walkthrough with Real Numbers
Comments posted to this topic are about the item Parameter Sniffing on SQL Server...
Question of the Day
Checking the Error Log II
What is the reason I should change my old code that uses xp_readerrorlog?
See possible answers