SQLPerformance.com

SQLPerformance.com is about providing innovative and practical solutions for improving SQL Server performance. Whether you are running a 3rd party application database where very little can be changed, or you are a DBA at a site where getting the application developers to change anything is next to impossible, industry experts including Paul Randal, Jonathan Kehayias, Erin Stellato and Paul White will cover both the "how" and the "why."

Articles by SQLPerformance.com

Itzik Ben-Gan resumes his blog series on T-SQL bugs, pitfalls, and best practices, treating an issue with correlated column references in subqueries.
Paul Randal provides a detailed introduction to troubleshooting SQL Server workload performance using wait statistics.
Paul White explains in detail the factors SQL Server considers when enabling minimal logging for inserts into a table without a clustered index.
Guest author Dustin Dorsey shows how to prepare for a migration to Azure SQL Database by sending SentryOne monitoring data to the DTU calculator.
Paul White goes deep on grouped aggregation pushdown, and explains examples where this optimization is unsuccessful or simply not attempted, using the undocumented command DBCC CSINDEX.
April 23, 2019 | SQLPerformance.com | SQL Server, ColumnStore 0
Itzik Ben-Gan asks you to invest in SQL Server's future by voting for Row Pattern Recognition, a potential T-SQL syntax extension he deems the next step in the evolution of window functions.
April 10, 2019 | SQLPerformance.com | T-SQL, SQL Server 0
Glenn Berry talks about the AMD EPYC CPUs now found in Azure Virtual Machines (in some regions) and their usage in balanced SQL Server workloads.
April 8, 2019 | SQLPerformance.com | Azure 0
Paul White explains why the IGNORE_DUP_KEY index option on a clustered index can result in much poorer performance than for a nonclustered unique index.
Rob Farley talks about filtered indexes and when you might want to add filtered columns to the index definition.
March 29, 2019 | SQLPerformance.com | T-SQL, SQL Server 0
Tim Radney explains some of the nuances of performance tuning your workloads in Azure SQL Database and Azure SQL Database Managed Instance.
Itzik Ben-Gan starts a new blog series on T-SQL bugs, pitfalls, and best practices, leading off with some common issues involving determinism.
March 13, 2019 | SQLPerformance.com | T-SQL, Best Practices 0
Erin Stellato walks through a quick and simple way to use Extended Events and the new XEvent Profiler to review queries on your system.
February 25, 2019 | SQLPerformance.com | Extended Events 0
Download the slide deck from Aaron Bertrand's latest presentation, "Fix Slow Queries. Fast."
February 21, 2019 | SQLPerformance.com | Plan Explorer, SentryOne 0
Itzik Ben-Gan reviews the logic and performance of user submissions to a reader challenge involving joining between two tables based on closest match.
February 13, 2019 | SQLPerformance.com | T-SQL 0
Glenn Berry provides some details about how compatibility levels and the cardinality estimator have changed over the years, and why modern versions of SQL Server continue to be the better option.
January 29, 2019 | SQLPerformance.com | SQL Server 0

Get the best SQL query analysis and optimization tool – free!

Plan-Explorer-logo-RGB-800px
  • Index Analysis Sandbox
  • Statistics Analysis with Histogram
  • Management Studio Add-in
  • Plan Diagram
  • Deadlocks
  • History and Comments
Free Download Learn More