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  • Automating dm_exec_query_stats and dm_db_index_usage_stats analysis

    Everyone should know by now how really useful the DMVs dm_exec_query_stats, and dm_db_index_usage_stats and the associated DMFs for obtaining the SQL and XML plan: dm_exec_sql_text, dm_exec_query_plan, and dm_exec_text_query_plan. Of course it has been explained that dm_exec_query_stats is not a replacement for SQL Server Profiler and SQL Trace. ...
    Posted to Joe Chang (Weblog) by jchang on June 22, 2009
  • Why Logical IO is a poor performance metric

    Many years ago, I attended a conference where a very highly respected Oracle performance expert advocated the use of logical IO count as a performance metric. The argument was that a logical IO is a fairly substantial operation relative to others. I suppose that detailed logical IO was already collected supported this. So why would logical IO be ...
    Posted to Joe Chang (Weblog) by jchang on September 10, 2008
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