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

View More author details

Introducing DMVs

SQL Server 2005 introduced a new concept in the Database Engine – the SQL Operating System (SQLOS). The SQLOS is an abstraction layer that encapsulates all the low-level resource management and monitoring tasks that the SQL Database Engine must perform while providing an application programming interface (API) for other components of the Database Engine to leverage these services. Not only does this centralization of resource management code make the SQL Database Engine more efficient, but it also provides a central location for monitoring various aspects of Database Engine performance. DMVs take advantage of this centralized architecture by providing the user with a mechanism to view this information in a way that is lightweight and accurate.

DMVs allow the user to query memory structures in SQLOS. Some DMVs show information that is only relevant for the specific point in time at which they are queried, while other DMVs show cumulative information that goes...

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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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Introducing DMVs

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