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