December 2013
Intermediate to advanced
1872 pages
153h 31m
English
book
Microsoft® SQL Server 2012 Unleashed
by Ray Rankins, Paul T. Bertucci, Chris Gallelli, Alex T. Silverstein
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max degree of parallelism
Type: Advanced
Default value: 0
The max degree of parallelism option specifies the number of threads to be used for parallel query execution. On a single-processor server, this value is always ignored. For multiprocessor servers, a default value of 0 signifies that all the CPUs will be used for parallel query execution. When SQL Server 2012 runs on a machine that has more than one processor, it detects the best degree of parallelism. If you set this value to 1, all query plans are serialized. If the affinity mask option is on, parallel query execution takes place only on the CPUs for which the affinity mask bit is turned on. In that way, these two options can be used in conjunction. The application types assessment is ...