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#Post#: 121--------------------------------------------------
Possible Bad NC Indexes (writes > reads)
By: srinivasma_exceldbp Date: December 25, 2014, 4:20 am
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-- Possible Bad NC Indexes (writes > reads)
-- Look for indexes with high numbers of writes and zero or very
low numbers of reads
-- Consider your complete workload, and how long your instance
has been running
-- Investigate further before dropping an index!
-- Select Database in dropdown in SSMS and run
SELECT OBJECT_NAME(s.[object_id]) AS [table Name], i.name AS
[Index Name], i.index_id,
i.is_disabled, i.is_hypothetical, i.has_filter, i.fill_factor,
user_updates AS [Total Writes], user_seeks + user_scans +
user_lookups AS [Total Reads],
user_updates - (user_seeks + user_scans + user_lookups) AS
[Difference]
FROM sys.dm_db_index_usage_stats AS s WITH (NOLOCK)
INNER JOIN sys.indexes AS i WITH (NOLOCK)
ON s.[object_id] = i.[object_id]
AND i.index_id = s.index_id
WHERE OBJECTPROPERTY(s.[object_id],'IsUserTable') = 1
AND s.database_id = DB_ID()
AND user_updates > (user_seeks + user_scans + user_lookups)
AND i.index_id > 1
ORDER BY [Difference] DESC, [Total Writes] DESC, [Total Reads]
ASC OPTION (RECOMPILE);
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