Blogs Dennes Torres in Blogs SQL 2017 new DMF: Managing VLOGs in our databases SQL Server 2017 brings to us some new interesting DMV’s and DMF’s, one of them is sys.dm_db_log_info. This new DMF... 20 June 2017 4 min read
Database Administration Dennes Torres in Database Administration Parameter Sniffing: Fix It with Query Store Diagnose and fix SQL Server parameter sniffing problems using Query Store. Identify bad plan reuse, compare execution plans, and force... 06 June 2017 25 min read
Database Administration Enrico van de Laar in Database Administration Query Store and In-Memory OLTP Once you have Query Store enabled on your databases, runtime statistics are generated for your queries; but what about the... 04 January 2017 11 min read
Performance Robert Sheldon in Performance SQL Server Statistics Basics Distribution statistics are used by SQL Server's Query Optimiser to determine a good execution plan for your SQL query. You... 22 July 2016 17 min read
Kathi Kellenberger T-SQL Window Function Speed Phreakery: The FIFO Stock Inventory Problem Sometimes, in the quest for raw SQL performance, you are forced to sacrifice legibility and maintainability of your code, unless... 16 March 2016 14 min read
Dwain Camps SQL Conditional JOIN: Why It’s Slow & What to Use Instead Learn why conditional JOINs using CASE in the ON clause cause poor SQL Server performance. Compare alternatives: LEFT OUTER JOIN... 07 September 2015 14 min read
Kathi Kellenberger T-SQL Window Functions Speed Phreakery Before SQL Server had SQL window functions, SQL Server developers had to use all manner of tricks and algorithms to... 27 August 2015 12 min read
Tony Davis Basic SQL Server Performance Troubleshooting For Developers The speed of a slow SQL Query can almost always be improved. In SQL Server, the query optimizer determines the... 14 August 2015 39 min read
Fabiano Amorim Never Ignore a Sort Warning in SQL Server It is always bad news if your SQL queries are having to use the SORT operator. It is worse news... 18 March 2015 9 min read
Robert Sheldon 14 SQL Server Indexing Questions You Were Too Shy To Ask One of the first things one needs to understand well about SQL Server is indexes, but somehow many of the... 25 March 2014 22 min read
Performance Jonathan Kehayias in Performance A Performance Troubleshooting Methodology for SQL Server When healing a sick SQL Server, you must forget the idea that there could ever be a simple correspondence between... 28 September 2011 33 min read
