Report server times out for 3 mb of excel

Question

I'm using a report viewer control in our application and it is working fine while displaying data and exporting it in different format by clicking export button provided by the report viewer.
I have another page but there will be a normal asp button to generate same report. so i am using report viewer control and calling the public method .Render exposed by the report viewer.
    byte[] bytes = rptViewver.ServerReport.Render("Excel", deviceInfo, out mimeType, out encoding, out extension, out streamids, out warnings);
this time i am getting below exception.
    Exception :System.Net.WebException: The request failed with HTTP status 504: Connection Timed Out.
    at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
    at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
    at Microsoft.SqlServer.ReportingServices2005.Execution.ReportExecutionService.Render(String Format, String DeviceInfo, String& Extension, String& MimeType, String& Encoding, Warning[]& Warnings, String[]& StreamIds)
    at Microsoft.SqlServer.ReportingServices2005.Execution.RSExecutionConnection.Render(String Format, String DeviceInfo, String& Extension, String& MimeType, String& Encoding, Warning[]& Warnings, String[]& StreamIds)
    at Microsoft.Reporting.WebForms.ServerReport.Render(String format, String deviceInfo, String& mimeType, String& encoding, String& fileNameExtension, String[]& streams, Warning[]& warnings)
    at Reports_GenerateReport.DisplayReport(Boolean IsExport) in f:\Sunil\View Reports\Login\Reports\GenerateReport.aspx.cs:line 1702
My doubt is like, why it is getting time outs while leveraging same report viewer control internally.
any suggestions to get rid of this?

Answer 1

Hi sGudivada,
Please check the ExecutionLog view in ReportServer database to learn more information about the report. The report server execution log contains information about the reports that execute on the server or on multiple servers in a scale-out deployment. For
example:
TimeDataRetrieval fields. Record number of milliseconds spent retrieving the data.
TimeProcessing fields. Record number of milliseconds spent processing the report.
TimeRendering fields. Record number of milliseconds spent rendering the report.
Reference:
http://msdn.microsoft.com/en-us/library/ms159110(v=sql.110).aspx
There is an article about troubleshooting report performance, you can refer to it.
http://msdn.microsoft.com/en-us/library/bb522806(v=sql.105).aspx
Thanks,
Alisa Tang
Alisa Tang
TechNet Community Support