Parallelism in Microsoft SQL Server

Published: 29 June 2023
on channel: DBAFundamentals

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Parallelism in Microsoft SQL Server - Torsten Strauß

SQL Server can execute queries in parallel which can sometimes improve the performance of your queries. However, parallelism has its own challenges; therefore, we will look at the concept of parallel executions to understand when it makes sense to run a query on more than one thread. We deal with topics such as CXPacket, threads, workers, execution context, branches, MAXDOP, Cost threshold for parallelism, NUMA nodes and the iterators that SQL Server can implement in the execution plan to enable parallelism.

Speaker
Torsten Strauß
Torsten (MVP, MCSE, MCT) has been working with Microsoft SQL Server since the turn of the millennium and is specialized in performance optimization for large SQL Server environments.

He has been with BP as a database engineer for over two decades and collaborates closely with Sarpedon Quality Lab as a Principal Microsoft SQL Server Consultant. Torsten is the founder of inside-sqlserver.com and has given more than 120 presentations on Microsoft SQL Server performance optimization at national and international conferences and user groups. Torsten has been recognized as a Microsoft Most Valuable Professional for Data Platform since 2018.

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