sqlserver索引的維護

1:查看索引碎片大于百分三十以上的索引

select object_id= object_id,indexid = index_id,partitionnum = partition_number,frag= avg_fragmentation_in_percent into #work_to_do from sys.dm_db_index_physical_stats(db_id(), null, null , null, 'LIMITED') --dm_ph_stats join sys.dm_db_partition_stats dm_pa_st on dm_ph_stats.object_id=dm_pa_st.object_id where avg_fragmentation_in_percent >= 30.0 and index_id > 0 and object_id in (select distinct a.object_id from sys.dm_db_partition_stats a join sys.indexes b on a.object_id=b.object_id and a.index_id=b.index_id where a.index_id>0 and a.in_row_data_page_count>1280 )select a.object_id,a.name,a.type_desc,b.partitionnum ,b.frag,b.indexid from sys.indexes a , #work_to_do b where a.object_id=b.object_id and a.index_id=b.indexid-- where object_id in(select objectid from #work_to_do) --drop table #work_to_do

2:查看單表的索引碎片

SELECT a.index_id, name, avg_fragmentation_in_percent FROM sys.dm_db_index_physical_stats (DB_ID(N'MIAO'), OBJECT_ID(N'miao.注冊信息表'), NULL, NULL, NULL) AS a JOIN sys.indexes AS b ON a.object_id = b.object_id AND a.index_id = b.index_id;

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看一下官網的推薦:

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avg_fragmentation_in_percent?值

修復語句

> 5% 且 < = 30%	ALTER INDEX REORGANIZE
> 30%	ALTER INDEX REBUILD WITH (ONLINE = ON)* ?

所以說大于百分三十的索引是要重建的. ---------------------------------------------重新組織索引---------------------------------------- ALTER INDEX IX_Employee_OrganizationalLevel_OrganizationalNode ON HumanResources.Employee REORGANIZE ; GO

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--------------------------------------------重新組織表中所有的索引-------------------------------------------- ALTER INDEX ALL ON HumanResources.Employee REORGANIZE

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-------------------------------------------重新生成的索引-------------------------------------------- ALTER INDEX PK_Employee_BusinessEntityID ON HumanResources.Employee REBUILD; GO

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---------------------------------------------重新生成表中所有的索引-------------------------------------------- ALTER INDEX ALL ON Production.Product REBUILD WITH (FILLFACTOR = 80, SORT_IN_TEMPDB = ON,STATISTICS_NORECOMPUTE = ON);

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轉載于:https://www.cnblogs.com/shengdimaya/p/5341093.html

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