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 Affinity mask conflicts with the IO affinity mask

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DeepGround
Yak Posting Veteran

73 Posts

Posted - 2011-06-14 : 12:47:55
Hello,

After installing R2 I am now getting the message "The affinity mask specified conflicts with the IO affinity mask specified." When I have any I/O affinity boxes checked on the same CPU as the Processor affinity.

Here is Microsoft's explanation:

The 'affinity mask' and 'affinity I/O mask' configuration values of SQL Server should not conflict. Performance may suffer if you choose to affinitize a processor for both SQL Server worker thread scheduling and for I/O processing. Therefore, you should ensure that the configuration values are not set for the same processor. The same recommendation applies to the 'affinity64 mask' and 'affinity64 I/O mask'.

My Question is, what if I do not have any CPU's to provide I/O other than the one providing the processing?

This was never a problem before.

Bustaz Kool
Master Smack Fu Yak Hacker

1834 Posts

Posted - 2011-06-14 : 19:14:31
You only have one CPU?

If you have Affinity or I/O Affinity turned off (All 0's), then the system performs the processing or I/O or whatever CPU it can find available.

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I have never met a man so ignorant that I couldn't learn something from him. -Galileo Galilei, physicist and astronomer (1564-1642)
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DeepGround
Yak Posting Veteran

73 Posts

Posted - 2011-06-15 : 10:59:02
I have 80 CPUs. They are all assigned for SQL worker processing. I can not afford to add 80 more CPUs for I/O.
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