• You need a representative workload for DTA to be even remotely accurate, so that's a trace file (or table, makes no difference) that recorded as much of a business cycle as possible and feasible, or a representative sample thereof.

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

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