Configuring Memory for SQL Server 2008 R2 Clustered Instance

  • Hey DBA's,

    I've been told to allocate 16Gig for one clustered instance and 8Gig for another. What would the settings be for Min and Max Memory?

  • I failed to mention that the instances are 64bit Enterprise Edition.

    The server has 64Gig installed.

  • Patricia Johnson (1/20/2011)


    Hey DBA's,

    I've been told to allocate 16Gig for one clustered instance and 8Gig for another. What would the settings be for Min and Max Memory?

    I normally don't set min memory, but on a multi-instance cluster I might consider it. I would set the min memory to at least 2GB less than max memory, as there have been documented issues with setting min/max the same.

    As for the max memory settings: 16GB and 8GB, respectively.

    The actual values are in MB so all you need to do is take 16*1024 and 8*1024 to get the actual values to set.

    Jeffrey Williams
    “We are all faced with a series of great opportunities brilliantly disguised as impossible situations.”

    ― Charles R. Swindoll

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  • Hey Jeffrey,

    So what you are saying is that I should set:

    16Gig instance:

    min=14336

    max=16384

    8Gig instance:

    min=6044

    max=8192

  • Usually Min memory is not required. Maximum memory is the main setting required to be set. Also you need to consider the number of instances running on the cluster and the failover situation. But you can implement Jeffrey's recommendation.

    Thank You,

    Best Regards,

    SQLBuddy

  • Thanks. I was also trying to confirm that I understood what he said. I guess I did. Thanks again.

    🙂

  • Yes you got them right. 🙂

    Thank You,

    Best Regards,

    SQLBuddy

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