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How to Find the Amount of Fragmentation on Your SQL Server Instance

  • Artigo

Need to find the amount of fragmentation in all your indexes in all databases for a given instance of SQL Server 2005 or later? You can use the undocumented/unsupported sp_MSforeachdb to loop through all the databases. For more information on fragmentation see my previous blog https://blogs.msdn.com/cindygross/archive/2009/11/20/sql-server-and-fragmentation.aspx.

-- Cindy Gross 2009

-- find fragmentation on all indexes in all databases on this instances

-- to find fragmentation on just one db comment out the exec master... line and the last quote

-- you must use the db_id() rather than NULL as the first parameter of the DMV or it will try to do a join across all dbs

SELECT

@@SERVERNAME, @@VERSION, GETDATE() as BatchStartTime

exec

master.sys.sp_MSforeachdb ' USE [?];

DECLARE @starttime datetime, @endtime datetime

SELECT @starttime = GETDATE()

SELECT db_name() as CurrentDB, @starttime as DBStartTime

SELECT db_name() as DatabaseName, OBJECT_NAME (a.object_id, DB_ID()) as ObjectName,

a.index_id, b.name as IndexName,

avg_fragmentation_in_percent, page_count, index_depth, index_type_desc, alloc_unit_type_desc

-- , record_count, avg_page_space_used_in_percent --(null in limited)

FROM sys.dm_db_index_physical_stats (db_id(), NULL, NULL, NULL, NULL) AS a

JOIN sys.indexes AS b

ON a.object_id = b.object_id AND a.index_id = b.index_id

--WHERE index_id > 0 -- exclude heaps

ORDER BY DatabaseName asc, avg_fragmentation_in_percent desc, ObjectName asc, IndexName asc

SELECT @endtime = GETDATE()

SELECT @starttime as StartTime, @endtime as EndTime, DATEDIFF(MINUTE,@starttime,@endtime) as TotalMinutes

'