我有一个由LINQ生成的查询并生成超时错误。 但是,当我在SQL服务器管理工作室中运行生成的查询时,它会在不到一秒的时间内执行。使用LINQ执行SQL查询时速度慢(使用全文搜索)
这里的查询:
exec sp_executesql N'SELECT COUNT(*) AS [value]
FROM [dbo].[Document] AS [t0]
INNER JOIN [dbo].[Document_Search_order_nummer](@p0) AS [t1] ON [t0].[DocumentID] = [t1].[Key]
LEFT OUTER JOIN [dbo].[DocType] AS [t2] ON [t2].[Id] = [t0].[DocumentTypeIDOut]
LEFT OUTER JOIN [dbo].[DocTypeFormat] AS [t3] ON [t3].[Id] = [t2].[FormatId]
LEFT OUTER JOIN [dbo].[DocTypeType] AS [t4] ON [t4].[Id] = [t2].[TypeId]
INNER JOIN [dbo].[OriginalDocument] AS [t5] ON [t5].[OriginalDocID] = [t0].[OriginalDocID]
INNER JOIN [dbo].[User] AS [t6] ON [t6].[User_ID] = [t0].[DocumentFrom]
INNER JOIN [dbo].[User] AS [t7] ON [t7].[User_ID] = [t0].[DocumentTo]
WHERE ([t0].[DocumentID] <> @p1)',N'@p0 nvarchar(4000),@p1 int',@p0=N'"*+11110001+*" ',@p1=270675
下面是从SQL Server事件探查器日志:
使用LINQ:
事件类= RPC:完成
应用程序名称= .net SqlClient数据提供
CPU = 12625
Reads = 1137844
Writ ES = 0
时间= 29989
使用SQL Server Management Studio中:
事件类= SQL:BatchCompleted
应用程序名称=微软SQL Server Management Studio中 - 查询
CPU = 78
读取= 31645
写入= 0
持续时间= 99
什么是日由于与同等查询有很大的性能差异,我该如何解决这个问题?
没有人能让我走上正轨吗? :( – brechtvhb 2011-04-29 12:59:19
请看这里:http://www.mssqltips.com/sqlservertip/1304/reproducing-sql-server-query-execution-plan-performance-problems/ – 2011-12-20 17:27:28