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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affinity I/O mask
Type: Advanced option; requires a reboot of SQL Server to take effect
Default value: 0
In Windows Servers, multitasking sometimes requires that process threads move among different processors. This type of movement of processing threads can reduce Microsoft SQL Server performance under heavy system loads because each processor cache is repeatedly reloaded with data. Assigning processors to specific threads can improve performance by eliminating processor reloads; such an association between a thread and a processor is called processor affinity. SQL Server 2012 supports processor affinity by means of two affinity mask options: affinity mask (to deal with the processor affinity needs) and affinity I/O mask (to address I/O-related ...