特定數據庫上的 DataAdapter.fill(dataset) 超時異常

Question

在 VB.NET 應用程序 (VS2005) 中，我通過 SQLDataAdapter 調用存儲過程。 在我的本地數據庫上一切正常。 如果我在另一個數據庫上執行此操作，則會出現超時異常。 這是代碼：

  Public Overloads Shared Function ExecuteDataset( _
                                                    ByVal connection As SqlConnection, _
                                                    ByVal commandType As CommandType, _
                                                    ByVal commandText As String, _
                                                    ByVal ParamArray commandParameters() As SqlParameter) As DataSet
        If (connection Is Nothing) Then Throw New ArgumentNullException("connection")
        ' Create a command and prepare it for execution
        Dim cmd As New SqlCommand
        Dim ds As New DataSet
        Dim dataAdatpter As SqlDataAdapter
        Dim mustCloseConnection As Boolean = False

        dataAdatpter = Nothing

        PrepareCommand(cmd, connection, CType(Nothing, SqlTransaction), commandType, commandText, commandParameters, mustCloseConnection)
        cmd.CommandTimeout = 0 'I get a timeout exception if I leave this out
        Try
            ' Create the DataAdapter & DataSet
            dataAdatpter = New SqlDataAdapter(cmd)

            ' Fill the DataSet using default values for DataTable names, etc
            dataAdatpter.Fill(ds)

            ' Detach the SqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear()
        Finally
            If (Not dataAdatpter Is Nothing) Then dataAdatpter.Dispose()
        End Try
        If (mustCloseConnection) Then connection.Close()

        ' Return the dataset
        Return ds
    End Function ' ExecuteDataset

我已經直接在數據庫上執行了存儲過程，並且運行良好且快速。 我還嘗試將 cmd 的 CommandTimeout 屬性設置為 0。當我這樣做時，存儲過程會被執行，但這需要很長時間。 同樣，如果我在本地數據庫上工作，則沒有問題。

這是超時異常的堆棧跟蹤

at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
   at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
   at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
   at System.Data.SqlClient.SqlDataReader.get_MetaData()
   at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
   at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
   at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
   at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
   at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior)
   at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
   at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior)
   at System.Data.Common.DbDataAdapter.Fill(DataSet dataSet)
   at KlantenApplicatie.BL.DAL.SQLHelper.ExecuteDataset(SqlConnection connection, CommandType commandType, String commandText, SqlParameter[] commandParameters) in C:\BitProjects\teamsystem\gerher\KlantenApplicatie.BL.DAL\sqlHelper\SQLHelper.vb:line 545

關於這可能是什么原因的任何想法？

Answer 1

我找到了解決方案。

結果證明這是查詢優化的參數嗅探問題。 我需要將 OPTION(RECOMPILE) 添加到創建存儲過程的 sql 中。

這個問題在這里解釋：

https://www.itprotoday.com/sql-server/using-recompile-query-hint-solve-parameter-sniffing-problems

和這里：

http://social.technet.microsoft.com/Forums/en-US/sqldatabaseengine/thread/74a85e26-be9b-4830-9638-6aa30fd9e3e7