優化數據庫之重建整理索引

 

-- 運行環境

/*

Microsoft SQL Server 2005 - 9.00.4035.00 (Intel X86)   Nov 24 2008 13:01:59  

Copyright (c) 1988-2005 Microsoft Corporation  Developer Edition on Windows NT 5.2 (Build 3790: Service Pack 1)

*/

USE master

go

IF OBJECT_ID ( 'SP_RefreshIndex' , 'P' ) IS NOT NULL

    DROP PROCEDURE SP_RefreshIndex

go

CREATE PROCEDURE SP_RefreshIndex

AS

IF db_id ()< 5

    RETURN

PRINT N' 優化 DB:' + DB_Name ()

SET NOCOUNT ON ;

DECLARE @command varchar ( 8000);

 

DECLARE partitions CURSOR FOR

SELECT

    CASE WHEN a. avg_fragmentation_in_percent< 30.0 THEN 'ALTER INDEX ' + d. Name + ' ON ' + c. NAME + '.' + b. NAME + ' REORGANIZE '

          ELSE 'ALTER INDEX [' + d. Name + '] ON [' + c. NAME + '].[' + b. NAME + '] REBUILD' END +

    CASE WHEN partitioncount> 1 THEN ' PARTITION=' + rtrim ( a. partition_number)+ ';' ELSE ';' END

FROM sys.dm_db_index_physical_stats ( DB_ID (), NULL, NULL , NULL, 'LIMITED' ) AS a

    INNER JOIN sys.objects AS b ON a. object_id = b. object_id

    INNER JOIN sys.schemas AS c ON c. schema_id = b. schema_id

    INNER JOIN sys.indexes AS d ON d. object_id = a. object_id AND d. index_id= a. index_id

    INNER JOIN ( SELECT object_id , index_id, partitioncount= COUNT (*) FROM sys.partitions GROUP BY object_id , index_id) AS e ON e. object_id = a. object_id AND e. index_id= a. index_id

WHERE a. avg_fragmentation_in_percent > 10.0 AND a. index_id > 0 AND d. Name IS NOT NULL

 

OPEN partitions;

FETCH NEXT   FROM partitions INTO @command;

WHILE @@FETCH_STATUS = 0

BEGIN

    EXEC ( @command);

    FETCH NEXT FROM partitions INTO @command;

END

CLOSE partitions;

DEALLOCATE partitions;

 

GO

exec sp_ms_marksystemobject 'SP_RefreshIndex' -- 標記為系統存儲過程

go

 

EXEC sp_msforeachdb 'use [?] exec SP_RefreshIndex' -- 優化整個實例所有庫