關(guān)于重新組織和重新生成索引sp_RefreshIndex的介紹_Mssql數(shù)據(jù)庫教程

use master
go
if object_id('sp_RefreshIndex') Is not null
Drop Proc sp_RefreshIndex
Go
create proc sp_RefreshIndex
(
@Reorganize_Fragmentation_Percent smallint = 5 -- 當(dāng)邏輯碎片百分比 > 5% 重新組織索引
,@Rebuild_Fragmentation_Percent smallint = 30 -- 當(dāng)邏輯碎片百分比 > 30% 重新生成索引
)
as
begin
/* 調(diào)用方法：
.針對當(dāng)前實例所有數(shù)據(jù)庫： exec sys.sp_MSforeachdb 'use ?;exec sp_RefreshIndex'
.針對當(dāng)前數(shù)據(jù)庫： exec sp_RefreshIndex
*/

--對系統(tǒng)數(shù)據(jù)庫不作重新組織索引和重新生成索引
if (db_name() in ('master','model','msdb','tempdb')) return;

--如果邏輯碎片（索引中的無序頁）的百分比 <= 5% ，就不作重新組織索引和重新生成索引
if not exists(select 1 from sys.dm_db_index_physical_stats(db_id(),null,null,null,null) a where a.index_id>0 and a.avg_fragmentation_in_percent > @Reorganize_Fragmentation_Percent) return


print replicate('-',60)+char(13)+char(10)+replicate(' ',14)+N'對數(shù)據(jù)庫 '+quotename(db_name())+N' 進(jìn)行索引優(yōu)化'+replicate(' ',20)+char(13)+char(10)

declare @sql nvarchar(2000),@str nvarchar(2000)

declare cur_x cursor for
select 'alter index '+quotename(a.name)+' on '+quotename(object_schema_name(a.object_id))+'.'+quotename(object_name(a.object_id))+case when b.avg_fragmentation_in_percent<=@Rebuild_Fragmentation_Percent then ' reorganize;'else ' rebuild;'end as [sql]
,case when b.avg_fragmentation_in_percent<=@Rebuild_Fragmentation_Percent then N'重新組織索引：' else N'重新生成索引：'end +quotename(object_schema_name(a.object_id))+'.'+quotename(object_name(a.object_id))+'.'+quotename(a.name) as [str]
from sys.indexes a
inner join sys.dm_db_index_physical_stats(db_id(),null,null,null,null) b on b.object_id=a.object_id
and b.index_id=a.index_id
where a.index_id>0
and b.avg_fragmentation_in_percent > @Reorganize_Fragmentation_Percent
order by object_name(a.object_id),a.index_id

open cur_x
fetch next from cur_x into @sql,@str

while (@@fetch_status = 0)
begin

exec(@sql)
print @str
fetch next from cur_x into @sql,@str

end
close cur_x
deallocate cur_x

end
go
exec sp_ms_marksystemobject 'sp_RefreshIndex'
go

use master
go
exec sys.sp_MSforeachdb 'use ?;exec sp_RefreshIndex'
go