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    <p>display your "settings" from within the stored procedure and from just with SSMS. I have this same thing, faster in SSMS and slower in procedure. You can sometimes resolve this because SSMS is running with differeent settings than the procedure, get them same and you might be able to see the same performance in the procedure. Here is some example code to display the settings:</p> <pre><code>SELECT SESSIONPROPERTY ('ANSI_NULLS') --Specifies whether the SQL-92 compliant behavior of equals (=) and not equal to (&lt;&gt;) against null values is applied. --1 = ON --0 = OFF SELECT SESSIONPROPERTY ('ANSI_PADDING') --Controls the way the column stores values shorter than the defined size of the column, and the way the column stores values that have trailing blanks in character and binary data. --1 = ON --0 = OFF SELECT SESSIONPROPERTY ('ANSI_WARNINGS') --Specifies whether the SQL-92 standard behavior of raising error messages or warnings for certain conditions, including divide-by-zero and arithmetic overflow, is applied. --1 = ON --0 = OFF SELECT SESSIONPROPERTY ('ARITHABORT') -- Determines whether a query is ended when an overflow or a divide-by-zero error occurs during query execution. --1 = ON --0 = OFF SELECT SESSIONPROPERTY ('CONCAT_NULL_YIELDS_NULL') --Controls whether concatenation results are treated as null or empty string values. --1 = ON --0 = OFF SELECT SESSIONPROPERTY ('NUMERIC_ROUNDABORT') --Specifies whether error messages and warnings are generated when rounding in an expression causes a loss of precision. --1 = ON --0 = OFF SELECT SESSIONPROPERTY ('QUOTED_IDENTIFIER') --Specifies whether SQL-92 rules about how to use quotation marks to delimit identifiers and literal strings are to be followed. --1 = ON --0 = OFF </code></pre> <p>you can just add them to your result set::</p> <pre><code>SELECT col1, col2 ,SESSIONPROPERTY ('ARITHABORT') AS ARITHABORT ,SESSIONPROPERTY ('ANSI_WARNINGS') AS ANSI_WARNINGS ,SESSIONPROPERTY ('... FROM ... </code></pre> <p>if you ry them one at a time, try <code>ARITHABORT</code> first.</p> <p>see: <a href="https://stackoverflow.com/questions/4327610/resolving-an-ado-timeout-issue-in-vb6/4329645#4329645">Resolving an ADO timeout issue in VB6</a> and <a href="https://stackoverflow.com/q/2465887/65223">Why would SET ARITHABORT ON dramatically speed up a query?</a></p>
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    1. POperformance issue on stored procedure/udf vs plain query from sql mgmnt console in sql server
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    1. POperformance issue on stored procedure/udf vs plain query from sql mgmnt console in sql server
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    1. COok, let me try this and i'll get back to you.
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    2. COit looks like these are db level settings and should be the same for both SSMS and the stored proc. Anyway after further research, it seems that the udf is the trouble maker. if I convert that to a stored proc and use ArithAbort = OFF (weird, it should be ON), it seems to run under 16 seconds. But I have to use a function because that logic is being used from multiple procs. Not sure what else to try but this was a good suggestion.
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    3. COi'll accept the answer because the arithAbort does seem to make a difference.
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