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SQL Server 2008
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SQL Server 2008 - General
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SSMS 2008 Stored Proc WITH RECOMPILE
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SSMS 2008 Stored Proc WITH RECOMPILE
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MattW2010
MattW2010
Posted Friday, April 02, 2010 9:41 AM
Valued Member
Group: General Forum Members
Last Login: Friday, June 14, 2013 7:26 AM
Points: 57,
Visits: 383
Thank you so much to all that have replied. I can't tell you how much I appreciate it.
What are atypical parameters (sorry, I'm kind of a junior DBA)? From what I understand, the SP wasn't ever even updated. It just stopped working one day. When we point the SP at different boxes (without the recompile), the information pulls up fine on the site. However, when we point it at our production box, it does not work unless I add the recompile code.
Does that change the direction of the answers given?
Post #895762
Paul White
Paul White
Posted Friday, April 02, 2010 9:53 AM
SSChampion
Group: General Forum Members
Last Login: Today @ 10:48 AM
Points: 10,990,
Visits: 10,578
"Atypical parameters" refers to the fact that SQL Server may cache a plan based on the actual parameter values passed on the first call of a procedure. If those specific parameter values are not typical (of all possible parameter values) the cached plan may not be a good one for other parameter values. Something like that, anyway
Statistics Used By The Optimizer
Compilation and Re-compilation
Paul White
SQL Server MVP
SQLblog.com
@SQL_Kiwi
Post #895782
MattW2010
MattW2010
Posted Monday, April 05, 2010 9:25 AM
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Last Login: Friday, June 14, 2013 7:26 AM
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I just wanted to thank you guys for all your input. I added "optimize for unknown" to the sproc and the site is currently responding well.
I believe the parameter sniffing was the main issue.
Thanks again,
Matt
Post #896780
Paul White
Paul White
Posted Monday, April 05, 2010 9:34 AM
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Last Login: Today @ 10:48 AM
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Thanks for the feedback, Matt.
Paul White
SQL Server MVP
SQLblog.com
@SQL_Kiwi
Post #896787
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