DB Reindex

数据库在使用一段时间后，就会出现很多的索引碎片。

declare @ID int
set @ID=OBJECT_ID('SMT_QC')
dbcc showcontig(@ID)

Scan Density值越低代表越需做DBCC ReIndex ,刚做完DBCC会等于 ReIndex100%

下面是Reindex的存储

CREATE procedure [dbo].[DBReindex]  @DB varchar(20),@RowsLimit int=100000
as
set nocount on
declare @str varchar(500)
create table #tmpTable(TableName varchar(50),rows int,reserved varchar(50),data varchar(50),index_size varchar(50),unused varchar(50))
declare @table as varchar(50)if not exists(select 0 from sysobjects where name='Reindex_Log')CREATE table Reindex_Log(DB varchar(20),RowsLimit int,Tablename varchar(50),TransDatetime datetime)---循?环?将?用?户?表?insert into #tmptable 
declare TblCur  cursor for
select '['+name+']' from sysobjects where xtype='u'
open TblCur
fetch next from tblcur into @table
while @@fetch_status=0
begininsert into #tmptable exec sp_spaceused @tablefetch next from tblcur into @table
end
close TblCur
deallocate TblCur---循?环?Reindex
declare TblCur  cursor for
select '['+TableName+']' from #tmpTable where rows>@RowsLimit
open TblCur
fetch next from tblcur into @table
while @@fetch_status=0
begininsert into reindex_log(db,rowslimit,tablename,transdatetime) values(@DB,@RowsLimit,@table,getdate())dbcc dbreindex(@table)set @str='backup log '+@db+' with no_log'exec(@str)fetch next from tblcur into @table
end
close TblCur
deallocate TblCur
---插?入?日?志?
insert into reindex_log(db,rowslimit,tablename,transdatetime) values(@DB,@RowsLimit,'ReindexFinished',getdate())
drop table #tmpTable