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Dynamics 365 Community / Forums / Microsoft Dynamics GP (Archived) / Cost Threshold for Par...
Microsoft Dynamics GP (Archived)

Cost Threshold for Parallelism

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Posted on by Community Member

I'm trying to find the recommended setting for Cost Threshold for Parallelism, but haven't been able to find anything on Google; I've only been able to find MAXDOP, which is already set to 1.

What's the recommended setting for Cost Threshold for Parallelism for Dynamics GP?  For other OLTP servers, I've seen recommendations of 20-25.

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  • Suggested answer
    John Lowther Profile Picture
    John Lowther 5,122 on at

    In my humble opinion, I usually get a performance base line first, and then start changing the number by steadily increasing it over time, while monitoring performance to see if performance goes up, down, or remains the same.

    I would suggest monitoring the performance for at least a full week between changes.

    Let me know how it goes,

  • Verified answer
    Community Member Profile Picture
    Community Member on at

    Circling back to this, here's the answer

    QL Server ignores the cost threshold for parallelism value under the following conditions:

    • ...

    • The max degree of parallelism option is set to 1.

    technet.microsoft.com/.../ms188603(v=sql.105).aspx

  • KirkLivermont Profile Picture
    KirkLivermont 5,985 on at

    John,

    What do you normally set as the max degree of parallelism on your SQL Servers?

    Best regards,

    Kirk

  • Community Member Profile Picture
    Community Member on at

    MS recommends 1

  • KirkLivermont Profile Picture
    KirkLivermont 5,985 on at

    Hi Carl,

    I am aware of the recommendation however in my experience Microsoft's published recommendations don't always match real world requirements.

    Regards,

    Kirk

  • Community Member Profile Picture
    Community Member on at

    can you provide a link or docs for this?

    Dynamics (any one) has the same vague best practices.

  • Community Member Profile Picture
    Community Member on at

    Links/Docs to what?

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