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POPoor SP performance from ASP.NET
 

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    <p>I have a stored procedure that handles sorting, filtering and paging (using Row_Number) and some funky trickery :) The SP is running against a table with ~140k rows.</p> <p>The whole thing works great and for at least the first few dozen pages is super quick. However, if I try to navigate to higher pages (e.g. head to the last page of 10k) the whole thing comes to a grinding halt and results in a SQL timeout error.</p> <p>If I run the same query, using the same parms inside studio manager query window, the response is instant irrespective of the page number I pass in.</p> <p>At the moment it's test code that is simply binding to a ASP:Datagrid in .NET 3.5</p> <p>The SP looks like this:</p> <pre><code>BEGIN WITH Keys AS ( SELECT TOP (@PageNumber * @PageSize) ROW_NUMBER() OVER (ORDER BY JobNumber DESC) as rn ,P1.jobNumber ,P1.CustID ,P1.DateIn ,P1.DateDue ,P1.DateOut FROM vw_Jobs_List P1 WHERE (@CustomerID = 0 OR CustID = @CustomerID) AND (JobNumber LIKE '%'+@FilterExpression+'%' OR OrderNumber LIKE '%'+@FilterExpression+'%' OR [Description] LIKE '%'+@FilterExpression+'%' OR Client LIKE '%'+@FilterExpression+'%') ORDER BY P1.JobNumber DESC ),SelectedKeys AS ( SELECT TOP (@PageSize)SK.rn ,SK.JobNumber ,SK.CustID ,SK.DateIn ,SK.DateDue ,SK.DateOut FROM Keys SK WHERE SK.rn &gt; ((@PageNumber-1) * @PageSize) ORDER BY SK.JobNumber DESC) SELECT SK.rn ,J.JobNumber ,J.Description ,J.Client ,SK.CustID ,OrderNumber ,CAST(DateAdd(d, -2, CAST(isnull(SK.DateIn,0) AS DateTime)) AS nvarchar) AS DateIn ,CAST(DateAdd(d, -2, CAST(isnull(SK.DateDue,0) AS DateTime)) AS nvarchar) AS DateDue ,CAST(DateAdd(d, -2, CAST(isnull(SK.DateOut,0) AS DateTime)) AS nvarchar) AS DateOut ,Del_Method ,Ticket# ,InvoiceEmailed ,InvoicePrinted ,InvoiceExported ,InvoiceComplete ,JobStatus FROM SelectedKeys SK JOIN vw_Jobs_List J ON j.JobNumber=SK.JobNumber ORDER BY SK.JobNumber DESC END </code></pre> <p>And it's called via </p> <pre><code>sp_jobs (PageNumber,PageSize,FilterExpression,OrderBy,CustomerID) </code></pre> <p>e.g.</p> <pre><code>sp_Jobs '13702','10','','JobNumberDESC','0' </code></pre> <p>Can anyone shed any light on what might be the cause of the dramatic difference in performance between SQL query window and an asp.net page executing a dataset?</p>
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    1. COSorry about the layout, new here and unsure how to make the code look purdy :-}
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    2. COyou may also want to cross-post this over at the DBA StackExchange too. http://dba.stackexchange.com/
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    3. CO@Jordan Thanks for the pointer, I've just registered there and posted.
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