Question

在VB.NET应用程序（VS2005）中，我通过SQLDataAdapter调用存储过程。在我的本地数据库一切正常。如果我在另一个数据库上执行此操作，则会出现超时异常。这是代码：

  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

我已直接在数据库上执行存储过程，并且工作正常且快速。我还尝试将cmd的CommandTimeout属性设置为0。当我这样做时，存储过程被执行但这需要很长时间。再次，如果我在本地数据库上工作，没有问题。

这是超时异常的堆栈跟踪

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

关于可能是什么原因的任何想法？

Answer 1

我找到了解决方案。

事实证明这是查询优化的参数嗅探问题。我需要将OPTION（RECOMPILE）添加到创建存储过程的sql中。

这里解释了这个问题：

http://www.sqlmag.com/article/sql-server/-using-the-recompile-query-hint-to-solve-parameter-sniffing-problems-94369

在这里：

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

特定数据库上的DataAdapter.fill（dataset）超时异常

1 个答案: