asp.net 上的实体框架超时

Question

在总是相同的 SQL 视图上时不时地出现实体框架超时，然后我总是有两个选项来修复网站

我运行这个查询

USE [ibeems]
DBCC FREEPROCCACHE

或

我改变视图

然后网页会在接下来的几天内立即打开。

这是视图

USE [ibeems]

GO
ALTER VIEW [dbo].[ViewNewVerificationList]
AS
   SELECT        
      dbo.Quotation.ClientId, dbo.Quotation.ActualTurnover,    
      dbo.Quotation.VerificationFee, dbo.Quotation.ConsultationFee, 
      dbo.Quotation.RequestDateTime, dbo.Quotation.ConsultantFirmId, 
      dbo.Quotation.CompanyId,
      dbo.ActionHistory.ActionNameId AS LastActionID,
      dbo.ActionHistory.ActionDateTime AS LastActionDateTime,
      dbo.ActionHistory.Message AS LastActionNote,
      dbo.ActionHistory.ActionHistoryId AS LastQuotationActionHistoryId, 
      dbo.ActionHistory.ActionCategoryId AS LastActionCategoryID, 
      dbo.Client.CompanyName, dbo.Client.RegistrationNumber,    
      dbo.Client.ContactPerson, dbo.Client.ContactCellNumber, 
      dbo.Client.ContactEmail, dbo.Client.ConsultantId, 
      dbo.Consultant.Name, dbo.Consultant.Surname, 
      dbo.Quotation.Active AS QuotationActive, 
      dbo.Client.ClientCategoryId, dbo.Quotation.VerificationType, 
      dbo.Client.NoClientLogin, 
      dbo.VerificationTask.VerificationTaskId, 
      dbo.VerificationTask.StartedDateTime, 
      dbo.VerificationTask.FilePrepConsultantId, 
      dbo.VerificationTask.SubCharterSectorID, 
      dbo.VerificationTask.Active, 
      dbo.VerificationTask.CertificateDirectory, 
      dbo.VerificationTask.FinishDateTime, dbo.VerificationTask.UserId, 
      dbo.VerificationTask.QuoteId, 
      dbo.[User].Name AS UserName, dbo.[User].Surname AS UserSurname, 
      dbo.[User].IdNumber, dbo.[User].CellNumber, 
      dbo.[User].EmailAddress
   FROM                 
      dbo.Quotation 
   INNER JOIN
      dbo.Client ON dbo.Quotation.ClientId = dbo.Client.ClientId 
   INNER JOIN
      dbo.VerificationTask ON dbo.Quotation.QuoteId = dbo.VerificationTask.QuoteId 
   INNER JOIN
      dbo.Consultant ON dbo.VerificationTask.FilePrepConsultantId = dbo.Consultant.ConsultantId 
   INNER JOIN
      dbo.[User] ON dbo.VerificationTask.UserId = dbo.[User].UserId 
   INNER JOIN
      dbo.ActionHistory ON dbo.Quotation.QuoteId = dbo.ActionHistory.QuoteId
   INNER JOIN 
      (SELECT 
           ActionHistory.QuoteId, 
           MAX(ActionHistory.ActionHistoryId) As MaxId 
       FROM     
           ActionHistory 
       WHERE 
           (ActionNameId <> 9) AND (ActionNameId <> 23) 
           AND IsRemoved = 0
       GROUP BY 
           ActionHistory.QuoteId) MaxActionHistory ON MaxActionHistory.MaxId = ActionHistory.ActionHistoryId

Answer 1

看看这篇文章。

http://blogs.u2u.be/diederik/post/2011/01/31/Building-an-Entity-Framework-40-model-on-views-practical-tips.aspx

一些提示

1. 使用SCHEMABINDING
2. Index the views

您也可以remove a single plan from SQL Server，或者可能创建一个存储过程并将其映射到 EF。