Default trace - A Beginner's Guide

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Default trace - A Beginner's Guide

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Adam Haines

Posted Tuesday, November 11, 2008 12:19 AM

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Comments posted to this topic are about the item Default trace - A Beginner's Guide

My blog: http://jahaines.blogspot.com

Post #600430

ekoner

Posted Tuesday, November 11, 2008 1:19 AM

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I like it, but what's the cost of running this on a production server?

Measure twice, cut once

Post #600456

Anipaul

Posted Tuesday, November 11, 2008 2:58 AM

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Nice one ...

Post #600510

SuperDBA-207096

Posted Tuesday, November 11, 2008 4:33 AM

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Adam,
Well done! I think the default trace enabled by default? I checked my installations and it's enabled on all of them.

Mark

Post #600557

Adam Haines

Posted Tuesday, November 11, 2008 6:44 AM

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Dee (11/11/2008)

I like it, but what's the cost of running this on a production server?

I cant really say what the exact cost is because the cost is dependent on multiple factors including usage. I will say that the trace is very light weight. In fact, most do not even know this guy is running in the background.

My blog: http://jahaines.blogspot.com

Post #600622

Adam Haines

Posted Tuesday, November 11, 2008 6:48 AM

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Mark Horninger (11/11/2008)

Adam,
Well done! Is the default trace enabled by default?

Mark

Yes, you have to tell SQL to explicitly turn off this feature by issuing the sp_configure command.

My blog: http://jahaines.blogspot.com

Post #600625

Jack Corbett

Posted Tuesday, November 11, 2008 7:17 AM

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Adam,

Nice article. According to BOL you should use sys.traces instead of fn_trace_getinfo. Here is the BOL quote:

The sys.traces catalog view contains the current running traces on the system. This view is intended as a replacement for the fn_trace_getinfo function.

Also if you disable this trace many of the reports available in SSMS will no longer work as they get much of their information from this trace.

Jack Corbett

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Post #600650

Adam Haines

Posted Tuesday, November 11, 2008 7:30 AM

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Jack,

Thanks for the BOL quote. I find it somewhat amusing that MS states that sys.traces should be used instead of fn_get_trace_info on the sys.traces page; however, on the fn_trace_getinfo page makes absolutely no reference to sys.traces (even in the 2008 documentation).

Here is a link to the 2008 documentation
http://msdn.microsoft.com/en-us/library/ms173875.aspx

-Adam

My blog: http://jahaines.blogspot.com

Post #600664

Jack Corbett

Posted Tuesday, November 11, 2008 7:51 AM

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That is pretty funny.

sys.traces has more information and I find it to be in a more usable format than fn_trace_getinfo.

Post #600676

Adam Gojdas

Posted Tuesday, November 11, 2008 10:12 AM

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For those of us working in "locked down" environments you will need to have 'ALTER TRACE' permission in order to execute fn_trace_getinfo.

Most likely this is the permission you would need for sys.traces, which was mentioned in a reply here, as well.

Post #600796

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