Indices inutilizados sql server 2008

[iislas]

¿Que indices NO se usan?

Código SQL:

DECLARE @db VARCHAR(25)
SET @db = '<database>'
SELECT object_name(i.object_id), i.name 
FROM sys.indexes i, sys.objects o 
WHERE  i.index_id NOT IN (SELECT s.index_id 
       FROM sys.dm_db_index_usage_stats s 
    WHERE s.object_id=i.object_id AND 
    i.index_id=s.index_id AND 
   database_id = db_id(@db) )
AND o.TYPE = 'U'
AND o.object_id = i.object_id
ORDER BY object_name(i.object_id) ASC
GO
 

¿Que indices me hacen falta?

Código SQL:

SELECT 
  mig.index_group_handle, mid.index_handle, 
  CONVERT (DECIMAL (28,1), 
    migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans)
  ) AS improvement_measure, 
  'CREATE INDEX IDX_' + REPLACE(REPLACE(mid.statement, '[', ''), ']', '')+ CONVERT (VARCHAR, mig.index_group_handle) + '_' + CONVERT (VARCHAR, mid.index_handle) 
  + ' ON ' + mid.statement 
  + ' (' + ISNULL (mid.equality_columns,'') 
    + CASE WHEN mid.equality_columns IS NOT NULL AND mid.inequality_columns IS NOT NULL THEN ',' ELSE '' END 
    + ISNULL (mid.inequality_columns, '')
  + ')' 
  + ISNULL (' INCLUDE (' + mid.included_columns + ')', '') AS create_index_statement, 
  migs.*, mid.database_id, mid.[object_id]
FROM sys.dm_db_missing_index_groups mig
INNER JOIN sys.dm_db_missing_index_group_stats migs ON migs.group_handle = mig.index_group_handle
INNER JOIN sys.dm_db_missing_index_details mid ON mig.index_handle = mid.index_handle
WHERE CONVERT (DECIMAL (28,1), migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans)) > 10
ORDER BY migs.avg_total_user_cost * migs.avg_user_impact * (migs.user_seeks + migs.user_scans) DESC
 

¿Consejos?

Crear un PLAN DE MANTENIMIENTO que se ejecute al menos 1 vez por semana que incluya la REGENERACION DE INDICES