Profiler slows down the system

  • Hi All.

    I am facing a database slowness/hangs in my production environment.Last 10 days I got 3 calls from users complaining about performance(application running very slow or hanging). Once user logs in and app fires up first select statement(very simple statements) it hangs.Not always.As i said we had 3 occurrences in 10 days.Could not find anything in SQl Server Error log or Windows Event Log.App runs on different box.So i searched for solution and decided to run profiler to capture the cause. Once I run a trace in our DEV box and got calls from developers about system performance.So i turned if off.Events that selected are:

    RCP:Completed

    SP:StmtCompleted

    SQL:BatchCompleted

    SQL:StmtCompleted

    and i selected 'Save to table' option.

    We have SQl server 2008 R2 STD edition,32GB ram

    Now i have 2 question.

    1.Why is app hanging and how to solve this problem

    2.Why is Profiler drags performance down.

    Thank you

  • For one thing, "save to table" is a lot of overhead. Save it to file(s) instead, then load the file(s) into tables later to analyze.

    SQL DBA,SQL Server MVP(07, 08, 09) "Money can't buy you happiness." Maybe so, but it can make your unhappiness a LOT more comfortable!

  • use a server side trace and save to file.

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