SQL Server 分布式数据库性能测试

CREATE TABLE [dbo].[Commits]
(
    [CommitID] [bigint] IDENTITY(1,1) NOT FOR REPLICATION NOT NULL,
    [AuthorID] [bigint] NOT NULL,
    [CreatedDate] [datetime2](7) NOT NULL,
    [CreatedDateKey] [int] NOT NULL,
 CONSTRAINT [PK__Commits_CommitID] PRIMARY KEY CLUSTERED 
(
    [CommitID] ASC,
    [CreatedDateKey] ASC
)
) ON [PRIMARY]
GO


CREATE view [dbo].[view_commits]
as

select [CommitID]
      ,[AuthorID]
      ,[CreatedDate]
      ,[CreatedDateKey]
from dbo.commits c with(nolock)
where c.[CreatedDateKey] between 20150900 and 20160000

union ALL
select [CommitID]
      ,[AuthorID]
      ,[CreatedDate]
      ,[CreatedDateKey]
from db3.tdw.dbo.commits c with(nolock)
where c.[CreatedDateKey] between 20150000 and 20150500

union ALL
select [CommitID]
      ,[AuthorID]
      ,[CreatedDate]
      ,[CreatedDateKey]
from db2.tdw.dbo.commits c with(nolock)
where c.[CreatedDateKey] between 20150500 and 20150900
WITH check OPTION;
GO

select count(0)
from dbo.commits_total c  with(nolock)
where day(c.[CreatedDate])=1

select count(0)
from dbo.view_commits c  with(nolock)
where day(c.[CreatedDate])=1

select sum(t.cnt) as cnt
from
(
    select count(0) as cnt
    from dbo.commits c  with(nolock)
    where day(c.[CreatedDate])=1

    UNION all

    select p.cnt
    from openquery(db2,
    N‘select count(0) as cnt
    from dbo.commits c  with(nolock)
    where day(c.[CreatedDate])=1‘) as p

    UNION all

    select p.cnt
    from openquery(db3,
    N‘select count(0) as cnt
    from dbo.commits c  with(nolock)
    where day(c.[CreatedDate])=1‘) as p
) as t