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Learn T-SQL Querying - Second Edition

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

Product type Book

Published in Feb 2024

Publisher Packt

ISBN-13 9781837638994

Pages 456 pages

Edition 2nd Edition

Languages

Concepts

Database Administration

Authors (2):

Pedro Lopes

Pam Lahoud

View More author details

Table of Contents (18) Chapters

Preface

1. Part 1: Query Processing Fundamentals

2. Chapter 1: Understanding Query Processing

3. Chapter 2: Mechanics of the Query Optimizer

4. Part 2: Dos and Don’ts of T-SQL

5. Chapter 3: Exploring Query Execution Plans

6. Chapter 4: Indexing for T-SQL Performance

7. Chapter 5: Writing Elegant T-SQL Queries

8. Chapter 6: Discovering T-SQL Anti- Patterns in Depth

9. Part 3: Assembling Our Query Troubleshooting Toolbox

10. Chapter 7: Building Diagnostic Queries Using DMVs and DMFs

11. Chapter 8: Building XEvent Profiler Traces

12. Chapter 9: Comparative Analysis of Query Plans

13. Chapter 10: Tracking Performance History with Query Store

14. Chapter 11: Troubleshooting Live Queries

15. Chapter 12: Managing Optimizer Changes

16. Index

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Building Diagnostic Queries Using DMVs and DMFs

Dynamic management views (DMVs) and dynamic management functions (DMFs) expose relevant real-time information that can unlock the secrets of T-SQL execution and SQL Database Engine health, even on a live production server. There are hundreds of DMVs and DMFs (collectively referred to as DMVs) available in the SQL Database Engine, and while they are mostly documented, it may not be obvious how they can be used by database developers and administrators to troubleshoot performance both in production systems and during the development process.

In this chapter, we will start by enumerating some of the DMVs that are most relevant for both T-SQL developers and database administrators alike to troubleshoot T-SQL query performance. Building on this information, we will provide real-world examples to explore how to use DMVs to troubleshoot different poor-performance scenarios, as well as give us the information needed to begin building our own...

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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.

See other products by 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.

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