.NET批量大数据插入性能分析及比较(5.使用SqlBulkCopy)

 #region 使用SqlBulkCopy
         public static bool ExecuteTransactionScopeInsert(DataTable dt, int batchSize)
         {
             int count = dt.Rows.Count;
             string tableName = "TestTable";
             int copyTimeout = 600;
             bool flag = false;
             try
             {
                 using (SqlConnection cn = new SqlConnection(connectionString))
                 {
                     using (TransactionScope scope = new TransactionScope())
                     {
                         cn.Open();
                         using (SqlBulkCopy sbc = new SqlBulkCopy(cn))
                         {
                             //服务器上目标表的名称
                             sbc.DestinationTableName = tableName;
                             sbc.BatchSize = batchSize;
                             sbc.BulkCopyTimeout = copyTimeout;
                             for (int i = 0; i < dt.Columns.Count; i++)
                             {
                                 //列映射定义数据源中的列和目标表中的列之间的关系
                                 sbc.ColumnMappings.Add(dt.Columns[i].ColumnName, dt.Columns[i].ColumnName);
                             }
                             sbc.WriteToServer(dt);
                             flag = true;
                             scope.Complete();//有效的事务
                         }
                     }
                 }
             }
             catch (Exception ex)
             {
                 LogHelper.Error(ex.Message);
                 return false;
             }
             return flag;
         }
         #endregion

 

结果如下:

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:10;Time:10314;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:20;Time:4476;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:50;Time:2021;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:100;Time:1332;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:200;Time:978;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:400;Time:730;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:500;Time:649;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:600;Time:623;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:700;Time:669;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:800;Time:585;

Use SqlServer TransactionScope Insert;RecordCount:40000;BatchSize:1000;Time:681;

 

SqlBulkCopy原理是采用了SQL Server的BCP协议进行数据的批量复制，结合使用事务，就我们的案例而言，大约每批800条是平衡点，性能比逐条插入提高了100多倍，并前面同样使用事务批量插入的案例性能提升了7倍以上。