Вот скрипт, который найдет 25 самых неиспользуемых и редко используемых триггеров вместе с кучей статистики и с даже командой удаления.  Это нужно чтобы база данных не тормозила при апдейтах.

SELECT TOP 25
 o.name AS ObjectName
 , i.name AS IndexName
 , i.index_id AS IndexID
 , dm_ius.user_seeks AS UserSeek
 , dm_ius.user_scans AS UserScans
 , dm_ius.user_lookups AS UserLookups
 , dm_ius.user_updates AS UserUpdates
 , p.TableRows
 , 'DROP INDEX ' + QUOTENAME(i.name)
 + ' ON ' + QUOTENAME(s.name) + '.' + QUOTENAME(OBJECT_NAME(dm_ius.OBJECT_ID)) AS 'drop statement'
 FROM sys.dm_db_index_usage_stats dm_ius
 INNER JOIN sys.indexes i ON i.index_id = dm_ius.index_id AND dm_ius.OBJECT_ID = i.OBJECT_ID
 INNER JOIN sys.objects o ON dm_ius.OBJECT_ID = o.OBJECT_ID
 INNER JOIN sys.schemas s ON o.schema_id = s.schema_id
 INNER JOIN (SELECT SUM(p.rows) TableRows, p.index_id, p.OBJECT_ID
 FROM sys.partitions p GROUP BY p.index_id, p.OBJECT_ID) p
 ON p.index_id = dm_ius.index_id AND dm_ius.OBJECT_ID = p.OBJECT_ID
 WHERE OBJECTPROPERTY(dm_ius.OBJECT_ID,'IsUserTable') = 1
 AND dm_ius.database_id = DB_ID()
 AND i.type_desc = 'nonclustered'
 AND i.is_primary_key = 0
 AND i.is_unique_constraint = 0
 ORDER BY (dm_ius.user_seeks + dm_ius.user_scans + dm_ius.user_lookups) ASC
 GO