7.2. CPU configuration

When an instance of SQL server starts, it's created as an operating system process. Unlike a simple application that performs a series of serial tasks on a single CPU, SQL Server is a complex application that must support hundreds or even thousands of simultaneous requests. In order to do this, the SQL Server process creates threads.

A multithreaded operating system such as Windows allows applications like SQL Server to create multiple threads in order to maximize CPU efficiency and application throughput. Threads are assigned and balanced across the available CPUs in a server. If a thread is waiting on the completion of a task such as a disk request, SQL Server can schedule the execution of other threads in the meantime. ...

Get SQL Server 2008: Administration in Action now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.