SQLServer选择查询性能问题_Sql_Performance_Select_Sql Server 2008 R2_Select Query

SQLServer选择查询性能问题

sql performance select sql-server-2008-r2

SQLServer选择查询性能问题,sql,performance,select,sql-server-2008-r2,select-query,Sql,Performance,Select,Sql Server 2008 R2,Select Query,我有一个select查询的性能问题。查询可能需要4分钟以上，这太长了。此查询是在.Net客户端进程上启动的，但不是在Microsoft SQLServer Management Studio上启动的。所以它有时能用5秒，有时能用4分钟，1分钟，30秒。所以我有3个问题：为什么选择查询太长？因为使用sqlserver缓存，它可以在不到5秒钟的时间内释放缓存。我使用DBCC FREEPROCCACHE和DBCC DROPCLEANBUFFERS指令测试这个查询为什么一个名为sort_init

我有一个select查询的性能问题。查询可能需要4分钟以上，这太长了。此查询是在.Net客户端进程上启动的，但不是在Microsoft SQLServer Management Studio上启动的。所以它有时能用5秒，有时能用4分钟，1分钟，30秒。所以我有3个问题：

为什么选择查询太长？因为使用sqlserver缓存，它可以在不到5秒钟的时间内释放缓存。我使用DBCC FREEPROCCACHE和DBCC DROPCLEANBUFFERS指令测试这个查询

为什么一个名为sort_init的sqlserver系统SQLTransaction重建索引需要30秒？我如何继续减少这一时间

为什么在执行计划中，我有聚集索引扫描，而不是聚集索引搜索（扫描所有页面可能需要很长时间）。扫描的每个聚集索引都是每个表的主键。注意：我还有很多查询使用这些表，这些表有聚集索引Seek on join子句。我做错了什么？如何使查询运行得更快？如何优化索引

我使用SQL Profiler跟踪问题，因此我有以下主要事件：

A） SQL分析器：

SP:StmtCompleted:

文本数据：

`SELECT [DespatchNote].[Id], [DespatchNote].[RealType], [DespatchNote].[DbOwner], [DespatchNote].[Archived], [CreatedOn], [CreatedById], [UpdatedOn], [UpdatedById], [KeyingFinished], [IsValidated], [ValidatedOn], [ValidatedById], [Notes], [DefaultDisplayLanguageId], [ReferencedTransactionId], [TransactionNumber], [IsCanceled], [CanceledOn], [CanceledById], [TransactionType], [IsPending], [IsGenerated], [PrintCount], [LastPrintDate], [AttachedFile], [IsPointOfSalesTransaction], [IsAffiliatedTransaction], [IsDone], [DoneById], [DoneOn], [IsSent], [SentOn] FROM [DespatchNote] INNER JOIN [Flow] ON [DespatchNote].[Id] = [Flow].[Id] INNER JOIN [Transaction] ON [DespatchNote].[Id] = [Transaction].[Id] INNER JOIN [ProductsMovements] ON [DespatchNote].[Id] = [ProductsMovements].[Id] WHERE (([DespatchNote].[RealType] = @param42485) AND (([ProductsMovements].[IsDone] = @param42486) AND ([DespatchNote].[Archived] IS NULL)))`

持续时间（毫秒）
：201277
SQLTransaction：

ObjectName:sort_init
持续时间（毫秒）：29982
EventSubClass:1-Commit

B） SHOWPLAN_全部打开时的查询

C）对于每个表，我启动DBCC SHOWCONTIG（[MyTable]），因此：

DBCC SHOWCONTIG分析表“事务”。。。表：“交易”（770101784）；索引ID:1，基本数据ID:5 分析niveau表格效应。 -页面分析：3690 -扩展分析：466 -延长通勤时间：526 MyEnne DES页PAR扩展……：7.9 -分析密度[Meilleur valeur:valeur réelle]……87.67%[462:527] -分析物流碎片：1.95% -碎片分析扩展：5.79% MyEnne D'Octs Listes Par Page……：631.1 -莫耶恩页密度（综合）：92.20%

DBCC SHOWCONTIG分析表“发货通知单”。。。表：“发送通知”（1138103095）；索引ID:1，基本数据ID:5 分析niveau表格效应。 -页面分析：409 -扩展分析：52 -延长通勤时间51 MyEnne DES页PAR扩展……：7.9 -分析密度[Meilleur valeur:valeur réelle]……100.00%[52:52] -分析物流碎片：0.00% -碎片分析扩展：5.77% MyEnne D'Octs Listes Par Page……：806.2 -莫耶恩页密度（综合）：90.04%

DBCC SHOWCONTIG分析表格“ProductsMovements”。。。表：“产品运动”（1074102867）；索引ID:1，基本数据ID:5 分析niveau表格效应。 -页面分析：1112 -扩展分析：139 -通勤延长线：138 MyEnne DES页PAR扩展……：8 -分析密度[Meilleur valeur:valeur réelle]……100.00%[139:139] -分析物流碎片：0.00% -碎片分析扩展：5.76% MyEnne D'Octs Listes Par Page……：725.6 -莫耶恩页密度（综合）：91.03%

DBCC SHOWCONTIG分析表“流量”。。。表：“流量”（1890105774）；索引ID:1，基本数据ID:5 分析niveau表格效应。 -页面分析：2662 -扩展分析：337 -延长通勤时间：343 MyEnne DES页PAR扩展……：7.9 -分析密度[Meilleur valeur:valeur réelle]……96.80%[333:344] -分析物流碎片：0.45% -碎片分析扩展：5.93% MyEnne D'Octs Listes Par Page……：579.2 -莫耶恩页密度（综合）：92.84%

D）各表的详细信息：

对于我数据库中的所有表，每个索引（聚集索引和非聚集索引）的总碎片小于10%

发货通知：（本表36360行）（7列）  索引：主键发送通知（群集） IX3_DispatchNote_RealType（非唯一、非群集） FK_DispatchNote_存档（非唯一、非群集）  创建表的脚本：

CREATE TABLE [dbo].[DespatchNote](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [IsSent] [bit] NULL,
    [SentOn] [datetime] NULL,
 CONSTRAINT [PK_DespatchNote] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[Transaction](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [Notes] [ntext] NULL,
    [DefaultDisplayLanguageId] [uniqueidentifier] NULL,
    [ReferencedTransactionId] [uniqueidentifier] NULL,
    [TransactionNumber] [nvarchar](40) NULL,
    [IsCanceled] [bit] NULL,
    [CanceledOn] [datetime] NULL,
    [CanceledById] [uniqueidentifier] NULL,
    [TransactionType] [int] NOT NULL,
    [IsPending] [bit] NOT NULL,
    [IsGenerated] [bit] NOT NULL,
    [PrintCount] [int] NOT NULL,
    [LastPrintDate] [datetime] NULL,
    [AttachedFile] [image] NULL,
    [IsPointOfSalesTransaction] [bit] NOT NULL,
    [IsAffiliatedTransaction] [bit] NOT NULL,
 CONSTRAINT [PK_Transaction] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_TransactionType]  DEFAULT (0) FOR [TransactionType]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsPending]  DEFAULT (0) FOR [IsPending]
GO

ALTER TABLE [dbo].[Transaction] ADD  DEFAULT ((0)) FOR [IsGenerated]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_PrintCount]  DEFAULT ((0)) FOR [PrintCount]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsPointOfSalesTransaction]  DEFAULT ((0)) FOR [IsPointOfSalesTransaction]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsAffiliatedTransaction]  DEFAULT ((0)) FOR [IsAffiliatedTransaction]

CREATE TABLE [dbo].[Flow](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [CreatedOn] [datetime] NULL,
    [CreatedById] [uniqueidentifier] NULL,
    [UpdatedOn] [datetime] NULL,
    [UpdatedById] [uniqueidentifier] NULL,
    [KeyingFinished] [bit] NULL,
    [IsValidated] [bit] NULL,
    [ValidatedOn] [datetime] NULL,
    [ValidatedById] [uniqueidentifier] NULL,
 CONSTRAINT [PK_Flow] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[ProductsMovements](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [IsDone] [bit] NULL,
    [DoneById] [uniqueidentifier] NULL,
    [DoneOn] [datetime] NULL,
 CONSTRAINT [PK_ProductsMovements] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

事务：（此表上136120行）（20列）  索引：PK_事务（集群） IX3_事务_RealType（非唯一、非群集） FK_事务\u引用事务ID（非唯一、非群集） FK_事务_DefaultDisplayLanguageId（非唯一、非群集） FK_事务_CanceledById（非唯一、非群集） FK_事务_已存档（非唯一、非群集）  创建表的脚本：

CREATE TABLE [dbo].[DespatchNote](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [IsSent] [bit] NULL,
    [SentOn] [datetime] NULL,
 CONSTRAINT [PK_DespatchNote] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[Transaction](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [Notes] [ntext] NULL,
    [DefaultDisplayLanguageId] [uniqueidentifier] NULL,
    [ReferencedTransactionId] [uniqueidentifier] NULL,
    [TransactionNumber] [nvarchar](40) NULL,
    [IsCanceled] [bit] NULL,
    [CanceledOn] [datetime] NULL,
    [CanceledById] [uniqueidentifier] NULL,
    [TransactionType] [int] NOT NULL,
    [IsPending] [bit] NOT NULL,
    [IsGenerated] [bit] NOT NULL,
    [PrintCount] [int] NOT NULL,
    [LastPrintDate] [datetime] NULL,
    [AttachedFile] [image] NULL,
    [IsPointOfSalesTransaction] [bit] NOT NULL,
    [IsAffiliatedTransaction] [bit] NOT NULL,
 CONSTRAINT [PK_Transaction] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_TransactionType]  DEFAULT (0) FOR [TransactionType]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsPending]  DEFAULT (0) FOR [IsPending]
GO

ALTER TABLE [dbo].[Transaction] ADD  DEFAULT ((0)) FOR [IsGenerated]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_PrintCount]  DEFAULT ((0)) FOR [PrintCount]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsPointOfSalesTransaction]  DEFAULT ((0)) FOR [IsPointOfSalesTransaction]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsAffiliatedTransaction]  DEFAULT ((0)) FOR [IsAffiliatedTransaction]

CREATE TABLE [dbo].[Flow](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [CreatedOn] [datetime] NULL,
    [CreatedById] [uniqueidentifier] NULL,
    [UpdatedOn] [datetime] NULL,
    [UpdatedById] [uniqueidentifier] NULL,
    [KeyingFinished] [bit] NULL,
    [IsValidated] [bit] NULL,
    [ValidatedOn] [datetime] NULL,
    [ValidatedById] [uniqueidentifier] NULL,
 CONSTRAINT [PK_Flow] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[ProductsMovements](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [IsDone] [bit] NULL,
    [DoneById] [uniqueidentifier] NULL,
    [DoneOn] [datetime] NULL,
 CONSTRAINT [PK_ProductsMovements] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

流量：（本表136120行）（13列）  索引：主键流（集群）
IX3_Flow_RealType（非唯一、非群集） FK_Flow_ValidatedById（非唯一、非群集） FK_Flow_UpdatedById（非唯一、非群集） FK_Flow_CreatedById（非唯一、非群集） FK_流_存档（非唯一、非群集）  创建表的脚本：

CREATE TABLE [dbo].[DespatchNote](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [IsSent] [bit] NULL,
    [SentOn] [datetime] NULL,
 CONSTRAINT [PK_DespatchNote] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[Transaction](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [Notes] [ntext] NULL,
    [DefaultDisplayLanguageId] [uniqueidentifier] NULL,
    [ReferencedTransactionId] [uniqueidentifier] NULL,
    [TransactionNumber] [nvarchar](40) NULL,
    [IsCanceled] [bit] NULL,
    [CanceledOn] [datetime] NULL,
    [CanceledById] [uniqueidentifier] NULL,
    [TransactionType] [int] NOT NULL,
    [IsPending] [bit] NOT NULL,
    [IsGenerated] [bit] NOT NULL,
    [PrintCount] [int] NOT NULL,
    [LastPrintDate] [datetime] NULL,
    [AttachedFile] [image] NULL,
    [IsPointOfSalesTransaction] [bit] NOT NULL,
    [IsAffiliatedTransaction] [bit] NOT NULL,
 CONSTRAINT [PK_Transaction] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_TransactionType]  DEFAULT (0) FOR [TransactionType]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsPending]  DEFAULT (0) FOR [IsPending]
GO

ALTER TABLE [dbo].[Transaction] ADD  DEFAULT ((0)) FOR [IsGenerated]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_PrintCount]  DEFAULT ((0)) FOR [PrintCount]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsPointOfSalesTransaction]  DEFAULT ((0)) FOR [IsPointOfSalesTransaction]
GO

ALTER TABLE [dbo].[Transaction] ADD  CONSTRAINT [DF_Transaction_IsAffiliatedTransaction]  DEFAULT ((0)) FOR [IsAffiliatedTransaction]

CREATE TABLE [dbo].[Flow](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [CreatedOn] [datetime] NULL,
    [CreatedById] [uniqueidentifier] NULL,
    [UpdatedOn] [datetime] NULL,
    [UpdatedById] [uniqueidentifier] NULL,
    [KeyingFinished] [bit] NULL,
    [IsValidated] [bit] NULL,
    [ValidatedOn] [datetime] NULL,
    [ValidatedById] [uniqueidentifier] NULL,
 CONSTRAINT [PK_Flow] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

CREATE TABLE [dbo].[ProductsMovements](
    [Id] [uniqueidentifier] NOT NULL,
    [Archived] [datetime] NULL,
    [RealType] [uniqueidentifier] NOT NULL,
    [DbOwner] [uniqueidentifier] NOT NULL,
    [RecordVersion] [timestamp] NOT NULL,
    [IsDone] [bit] NULL,
    [DoneById] [uniqueidentifier] NULL,
    [DoneOn] [datetime] NULL,
 CONSTRAINT [PK_ProductsMovements] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]

PRODUCTSMOVEMENTS：（此表上有83631行）（8列）  索引：PK_产品移动（集群） IX3_ProductsMovements_RealType（非唯一、非群集） FK_ProductsMovements_DoneById（非唯一、非群集） FK_专业版