.NET批量大数据插入性能分析及比较(5.使用SqlBulkCopy)

[c-sharp] view plaincopy

1. #region 使用SqlBulkCopy  
2.         public static bool ExecuteTransactionScopeInsert(DataTable dt, int batchSize)  
3.         {  
4.             int count = dt.Rows.Count;  
5.             string tableName = "TestTable";  
6.             int copyTimeout = 600;  
7.             bool flag = false;  
8.             try  
9.             {  
10.                 using (SqlConnection cn = new SqlConnection(connectionString))  
11.                 {  
12.                     using (TransactionScope scope = new TransactionScope())  
13.                     {  
14.                         cn.Open();  
15.                         using (SqlBulkCopy sbc = new SqlBulkCopy(cn))  
16.                         {  
17.                             //服务器上目标表的名称     
18.                             sbc.DestinationTableName = tableName;  
19.                             sbc.BatchSize = batchSize;  
20.                             sbc.BulkCopyTimeout = copyTimeout;  
21.                             for (int i = 0; i < dt.Columns.Count; i++)  
22.                             {  
23.                                 //列映射定义数据源中的列和目标表中的列之间的关系     
24.                                 sbc.ColumnMappings.Add(dt.Columns[i].ColumnName, dt.Columns[i].ColumnName);  
25.                             }  
26.                             sbc.WriteToServer(dt);  
27.                             flag = true;  
28.                             scope.Complete();//有效的事务     
29.                         }  
30.                     }  
31.                 }  
32.             }  
33.             catch (Exception ex)  
34.             {  
35.                 LogHelper.Error(ex.Message);  
36.                 return false;  
37.             }  
38.             return flag;  
39.         }  
40.         #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。