Archive

Archive for the ‘indexes’ Category

Find Index Fragmentation in SQL Server

December 20, 2011 Leave a comment

Below is a script using the DMV’s to find fragmented tables in a SQL Server database instead of the old way using DBCC SHOWCONTIG.  Most DBA’s want to start at using these DMV’s and this script can be customized to your environment

SELECT
    DB_NAME(database_id) as DatabaseName,
    OBJECT_SCHEMA_NAME(ps.object_id) + '.' + OBJECT_NAME(ps.object_id) as TableName,
    i.name as IndexName,
    ps.page_count as IndexPageCount,
    ps.avg_fragmentation_in_percent as IndexFragmentation,
    ps.avg_fragment_size_in_pages as IndexFragmentationPages,
    ps.partition_number as PartitionNumber,
    ps.index_type_desc as IndexDesc,
    ps.alloc_unit_type_desc as AllocUnitDesc,
    ps.index_depth as IndexDepth,
    ps.index_level as IndexLevel,
    i.[fill_factor] as [FillFactor],
    CASE i.index_id
        WHEN 1 THEN 1
        ELSE 0
        END as IsClustered
FROM 
sys.dm_db_index_physical_stats(DB_ID(),NULL,NULL,NULL,'LIMITED') ps
INNER JOIN sys.indexes i
    ON ps.object_id = i.object_id 
    AND ps.index_id = i.index_id
WHERE ps.index_type_desc <> 'HEAP'          --Ignore HEAP tables
AND ps.page_count > 30                      --Ingore less than 30 pages
AND ps.avg_fragmentation_in_percent > 30    --Fragmentation Threshold
ORDER BY TableName, IsClustered DESC, IndexName
Advertisements
Categories: indexes