You're reading from Learn T-SQL Querying - Second Edition

Product typeBook

Published inFeb 2024

PublisherPackt

ISBN-139781837638994

Edition2nd Edition

Tools

SQL Server

Concepts

Database Administration

Authors (2):

Pedro Lopes

Pam Lahoud

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Understanding the need for lightweight profiling

If you are asking yourself why you would want to know about an obscure Database Engine component named Query Profiling Infrastructure, then read on. Not many database professionals know it by name, but most have dealt with it when they need to troubleshoot query performance issues in a production environment. When a SQL Server performance issue occurs, one of the first requirements is to understand which queries are being executed and how system resources are being used, and one of the most important artifacts anyone can use to find out more about queries that are executing is query plans.

Analyzing a query plan, also known as an estimated execution plan, means that we’re only looking at what SQL Server estimated should be a good-enough plan to return the intended results efficiently. But since an estimated plan is missing runtime data for analysis, it can’t truly provide a conclusive explanation for many query performance...

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Learn T-SQL Querying - Second Edition

Published in: Feb 2024Publisher: PacktISBN-13: 9781837638994

Authors (2)

Pedro Lopes

Pedro Lopes is a Program Manager in the Database Systems group, based in Redmond, WA, USA. He has over 19 years of industry experience and has been with Microsoft for 9 years. He is currently responsible for program management of Database Engine features for in-market and vNext versions of SQL Server, with a special focus on the Relational Engine. He has extensive experience with query performance troubleshooting and is a regular speaker at numerous conferences such as SQLBits, PASS Summit, SQLIntersection, Microsoft Ignite, and Microsoft Build. He blogs about SQL on the SQL Server Team blog. He has authored several tools in the Tiger toolbox on GitHub: AdaptiveIndexDefrag maintenance solution, BPCheck, and usp_WhatsUp.
Read more about Pedro Lopes

Pam Lahoud

Pam Lahoud is a Program Manager in the Database Systems group, based in Redmond, WA, USA. She has been with Microsoft for 13 years and is currently responsible for program management of Database Engine features for in-market and vNext versions of SQL Server, with a special focus on the Storage Engine area. She is passionate about SQL Server performance and has focused on performance tuning and optimization, particularly from the developer's perspective, throughout her career. She is a SQL Server 2008 Microsoft Certified Master (MCM) with over 20 years of experience working with SQL Server.
Read more about Pam Lahoud

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Understanding the need for lightweight profiling

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