Home Forums SQL Server 2005 SQL Server 2005 Performance Tuning Quering sys.dm_db_index_physical_stats and sys.indexes has a negative impact on other queries running RE: Quering sys.dm_db_index_physical_stats and sys.indexes has a negative impact on other queries running

  • Because of the parameter "DETAILED", it will perform like a dbcc updateusage with countrows....

    BOL states:

    .... The nonleaf levels of indexes are only processed when mode = DETAILED.

    ...

    The DETAILED mode scans all pages and returns all statistics

    ...

    So you may experience IO overhead, locking ( ? ) , ...

    Johan

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