Troubleshooting Slow Queries That Already Have an Index
This article looks at some common query patterns that cause performance issues and provides some guidance on how to fix them.
2026-11-02
2,320 reads
Execution Plans
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
2,661 reads
Parameter Sensitive Plan Optimization vs. Parameter Sniffing: What SQL Server Fixes and What It Doesn't
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
3,857 reads
What Is a Cost-Based Optimizer?
When you execute a query, the database server has to figure a lot of things out. For even the simplest queries, there are usually several possible ways to get the job done.
2021-10-18
Blogs
Asking for Help Isn’t a Weakness
By Brian Kelley
During COVID, I attended training on software/enterprise architecture given by Mark Richards. One of...
The Proof of the Backup Is in the Pudding
For me, the objective is straightforward: have a backup strategy that is reliable, understandable,...
T-SQL Tuesday #204 – Are blogs still relevant?
By DesertDBA
Note: This post is the invitation for T-SQL Tuesday #204 on November 3rd, 2026....
Forums
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Question of the Day
SQL Server Vector Support II
With regard to SQL Server 2025's Vector support, what is an embedding?
See possible answers