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Editorial Team
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Asked: 2026-06-05T10:21:48+00:00

I made a CLR plugin for SQL Server 2008 R2 Developer edition that runs

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I made a CLR plugin for SQL Server 2008 R2 Developer edition that runs a lot of float computing on multiple threads. To test it, I used my laptop (core 2 duo 6670), and those calculations ran on 2 threads. This caused the CPU to be at 100% usage.

The question is this: When SQL process occupied 100% of CPU (for 2-3 minutes), my computer stops responding (cursor doesn’t move, the clock is not updated, the entire UI is dead). It never happend with other programs, so the question is : “Does SQL Server run with a higher priority than the other services?”

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  1. Editorial Team

    Taken from http://msdn.microsoft.com/en-us/library/ms188709%28v=sql.100%29.aspx

    Use the priority boost option to specify whether Microsoft SQL Server
    should run at a higher Microsoft Windows 2000 or Windows 2003
    scheduling priority than other processes on the same computer. If you
    set this option to 1, SQL Server runs at a priority base of 13 in the
    Windows 2000 or Windows Server 2003 scheduler. The default is 0, which
    is a priority base of 7.

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