SQL Server Plan Cache Bloat Performance Impacts
Learn about the SQL Server plan cache and how SQL Server caches query plans, and the potential of plan cache bloat which could impact performance.
2024-04-10
Learn about the SQL Server plan cache and how SQL Server caches query plans, and the potential of plan cache bloat which could impact performance.
2024-04-10
Guy Glantser is an Israeli SQL Server guru with a ton of great presentations on YouTube. I’ve had the privilege of hanging out with him in person a bunch of times over the year, and I’ll always get excited to do it again. He’s not just smart, but he’s friendly and funny as hell.
2024-04-08
An interesting question came in on PollGab. DBAmusing asked: If a query takes 5-7s to calculate the execution plan (then executes <500ms) if multiple SPIDS all submit that query (different param values) when there’s no plan at start, does each SPID calc the execution plan, one after the other after waiting for the prior SPID to finish?
2024-03-29
2024-03-25
421 reads
2024-03-11
410 reads
In this article, we look at why a SQL Server clustered index seek operation might not always be the most optimized approach for executing a query.
2024-02-28
2024-01-29
368 reads
Dive deep into the powerful SQL window functions, LAG() and LEAD(). Explore their intricacies, discover real-world examples, and avoid common pitfalls.
2023-12-11
4,388 reads
Welcome to part twenty of the plansplaining series. It has been a long time since I last wrote a plansplaining post, partly because of my health, but also for a large part because I was out of ideas. But recently I decided to dig a bit deeper into a feature that was released in SQL Server 2017 and that I had so far not played with: SQL Graph.
2023-12-06
I’ve quietly resolved performance issues by re-writing slow queries to avoid DISTINCT. Often, the DISTINCT is there only to serve as a “join-fixer,” and I can explain what that means using an example.
2023-11-06
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