sql Unused Indexes
SELECT o.name, indexname=i.name, i.index_id, user_seeks + user_scans + user_lookups As reads, user_updates As writes, (SELECT SUM(p.rows) FROM sys.partitions p WHERE p.index_id = s.index_id AND s.object_id = p.object_id) As rows, CASE WHEN s.user_updates < 1 THEN 100 ELSE 1.00 * (s.user_seeks + s.user_scans + s.user_lookups) / s.user_updates END AS reads_per_write, 'DROP INDEX ' + QUOTENAME(i.name) + ' ON ' + QUOTENAME(c.name) + '.' + QUOTENAME(OBJECT_NAME(s.object_id)) as 'drop statement' FROM sys.dm_db_index_usage_stats s INNER JOIN sys.indexes i ON i.index_id = s.index_id AND s.object_id = i.object_id INNER JOIN sys.objects o on s.object_id = o.object_id INNER JOIN sys.schemas c on o.schema_id = c.schema_id WHERE OBJECTPROPERTY(s.object_id,'IsUserTable') = 1 AND s.database_id = DB_ID() AND i.type_desc = 'nonclustered' AND i.is_primary_key = 0 AND i.is_unique_constraint = 0 AND (SELECT SUM(p.rows) FROM sys.partitions p WHERE p.index_id = s.index_id AND s.object_id = p.object_id) > 10000 ORDER BY reads_per_write Asc
Any indexes with reads of 0 should be removed, as they're not in use.
Updated: Wednesday 25th October 2017, 10:24am
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