Technical Article

The Ultimate Index Usage Reporter

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Util_IndexUsage

By Jesse Roberge - YeshuaAgapao@Yahoo.com

Update - Fixed existance check for drop

Reports index stats, index size+rows, member seek + include columns as two comma separated output columns, and index usage stats for one or more tables and/or schemas. Flexible parameterized sorting.

Has all the output of Util_ListIndexes plus the usage stats.

Update 2009-01-14:

Added IndexDepth and FillFactor output columns

Added 'Last xxx' datetime columns to the result set

Added @Delimiter parameter for the column listing output (Defaults to ,) for accomodating export to csv files.

Rearranged collumn output to match the pattern in Util_MissingIndexes. Constistant and looks better with the dates.

Removed duplicate output of 'is_unique'

Required Input Parameters

none

Optional

@SchemaName sysname='' Filters schemas. Can use LIKE wildcards. All schemas if blank. Accepts LIKE Wildcards.

@TableName sysname='' Filters tables. Can use LIKE wildcards. All tables if blank. Accepts LIKE Wildcards.

@Sort Tinyint=5 Determines what to sort the results by:

Value Sort Columns

1 Score DESC, user_seeks DESC, user_scans DESC

2 Score ASC, user_seeks ASC, user_scans ASC

3 SchemaName ASC, TableName ASC, IndexName ASC

4 SchemaName ASC, TableName ASC, Score DESC

5 SchemaName ASC, TableName ASC, Score ASC

@Delimiter VarChar(1)=',' Delimiter for the horizontal delimited seek and include column listings.

Usage:

EXECUTE Util_IndexUsage 'dbo', 'order%', 5, '|'

Copyright:

Licensed under the L-GPL - a weak copyleft license - you are permitted to use this as a component of a proprietary database and call this from proprietary software.

Copyleft lets you do anything you want except plagarize, conceal the source, proprietarize modifications, or prohibit copying & re-distribution of this script/proc.

This program is free software: you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as

published by the Free Software Foundation, either version 3 of the

License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU Lesser General Public License for more details.

see <http://www.fsf.org/licensing/licenses/lgpl.html> for the license text.

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SET ANSI_NULLS ON
SET QUOTED_IDENTIFIER ON
SET ANSI_PADDING ON
GO

IF OBJECT_ID('dbo.Util_IndexUsage', 'P') IS NOT NULL DROP PROCEDURE dbo.Util_IndexUsage
GO

/**
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Util_IndexUsage
By Jesse Roberge - YeshuaAgapao@Yahoo.com
Update - Fixed existance check for drop

Reports index stats, index size+rows, member seek + include columns as two comma separated output columns, and index usage stats for one or more tables and/or schemas.  Flexible parameterized sorting.
Has all the output of Util_ListIndexes plus the usage stats.

Update 2009-01-14:
Added IndexDepth and FillFactor output columns
Added 'Last xxx' datetime columns to the result set
Added @Delimiter parameter for the column listing output (Defaults to ,) for accomodating export to csv files.
Rearranged collumn output to match the pattern in Util_MissingIndexes. Constistant and looks better with the dates.
Removed duplicate output of 'is_unique'

Required Input Parameters
none

Optional
@SchemaName sysname=''Filters schemas.  Can use LIKE wildcards.  All schemas if blank.  Accepts LIKE Wildcards.
@TableName sysname=''Filters tables.  Can use LIKE wildcards.  All tables if blank.  Accepts LIKE Wildcards.
@Sort Tinyint=5Determines what to sort the results by:
ValueSort Columns
1Score DESC, user_seeks DESC, user_scans DESC
2Score ASC, user_seeks ASC, user_scans ASC
3SchemaName ASC, TableName ASC, IndexName ASC
4SchemaName ASC, TableName ASC, Score DESC
5SchemaName ASC, TableName ASC, Score ASC
@Delimiter VarChar(1)=','Delimiter for the horizontal delimited seek and include column listings.

Usage:
EXECUTE Util_IndexUsage 'dbo', 'order%', 5, '|'

Copyright:
Licensed under the L-GPL - a weak copyleft license - you are permitted to use this as a component of a proprietary database and call this from proprietary software.
Copyleft lets you do anything you want except plagarize, conceal the source, proprietarize modifications, or prohibit copying & re-distribution of this script/proc.

This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    see <http://www.fsf.org/licensing/licenses/lgpl.html> for the license text.

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**/
CREATE PROCEDURE dbo.Util_IndexUsage
@SchemaName SysName='',
@TableName SysName='',
@Sort tinyint=5,
@Delimiter VarChar(1)=','
AS

SELECT
sys.schemas.schema_id, sys.schemas.name AS schema_name,
sys.objects.object_id, sys.objects.name AS object_name,
sys.indexes.index_id, ISNULL(sys.indexes.name, '---') AS index_name,
partitions.Rows, partitions.SizeMB, IndexProperty(sys.objects.object_id,
sys.indexes.name, 'IndexDepth') AS IndexDepth,
sys.indexes.type, sys.indexes.type_desc, sys.indexes.fill_factor,
sys.indexes.is_unique, sys.indexes.is_primary_key, sys.indexes.is_unique_constraint,
ISNULL(Index_Columns.index_columns_key, '---') AS index_columns_key,
ISNULL(Index_Columns.index_columns_include, '---') AS index_columns_include,
ISNULL(sys.dm_db_index_usage_stats.user_seeks,0) AS user_seeks,
ISNULL(sys.dm_db_index_usage_stats.user_scans,0) AS user_scans,
ISNULL(sys.dm_db_index_usage_stats.user_lookups,0) AS user_lookups,
ISNULL(sys.dm_db_index_usage_stats.user_updates,0) AS user_updates,
sys.dm_db_index_usage_stats.last_user_seek, sys.dm_db_index_usage_stats.last_user_scan,
sys.dm_db_index_usage_stats.last_user_lookup, sys.dm_db_index_usage_stats.last_user_update,
ISNULL(sys.dm_db_index_usage_stats.system_seeks,0) AS system_seeks,
ISNULL(sys.dm_db_index_usage_stats.system_scans,0) AS system_scans,
ISNULL(sys.dm_db_index_usage_stats.system_lookups,0) AS system_lookups,
ISNULL(sys.dm_db_index_usage_stats.system_updates,0) AS system_updates,
sys.dm_db_index_usage_stats.last_system_seek, sys.dm_db_index_usage_stats.last_system_scan,
sys.dm_db_index_usage_stats.last_system_lookup, sys.dm_db_index_usage_stats.last_system_update,
(
(
(CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_seeks,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_seeks,0)))*10
+ CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_scans,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_scans,0)))*1 ELSE 0 END
+ 1
)
/CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_updates,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_updates,0))+1) ELSE 1 END
) AS Score
FROM
sys.objects
JOIN sys.schemas ON sys.objects.schema_id=sys.schemas.schema_id
JOIN sys.indexes ON sys.indexes.object_id=sys.objects.object_id
JOIN (
SELECT
object_id, index_id, SUM(row_count) AS Rows,
CONVERT(numeric(19,3), CONVERT(numeric(19,3), SUM(in_row_reserved_page_count+lob_reserved_page_count+row_overflow_reserved_page_count))/CONVERT(numeric(19,3), 128)) AS SizeMB
FROM sys.dm_db_partition_stats
GROUP BY object_id, index_id
) AS partitions ON sys.indexes.object_id=partitions.object_id AND sys.indexes.index_id=partitions.index_id
CROSS APPLY (
SELECT
LEFT(index_columns_key, LEN(index_columns_key)-1) AS index_columns_key,
LEFT(index_columns_include, LEN(index_columns_include)-1) AS index_columns_include
FROM
(
SELECT
(
SELECT sys.columns.name + @Delimiter + ' '
FROM
sys.index_columns
JOIN sys.columns ON
sys.index_columns.column_id=sys.columns.column_id
AND sys.index_columns.object_id=sys.columns.object_id
WHERE
sys.index_columns.is_included_column=0
AND sys.indexes.object_id=sys.index_columns.object_id
AND sys.indexes.index_id=sys.index_columns.index_id
ORDER BY key_ordinal
FOR XML PATH('')
) AS index_columns_key,
(
SELECT sys.columns.name + @Delimiter + ' '
FROM
sys.index_columns
JOIN sys.columns ON
sys.index_columns.column_id=sys.columns.column_id
AND sys.index_columns.object_id=sys.columns.object_id
WHERE
sys.index_columns.is_included_column=1
AND sys.indexes.object_id=sys.index_columns.object_id
AND sys.indexes.index_id=sys.index_columns.index_id
ORDER BY index_column_id
FOR XML PATH('')
) AS index_columns_include
) AS Index_Columns
) AS Index_Columns
LEFT OUTER JOIN sys.dm_db_index_usage_stats ON
sys.indexes.index_id=sys.dm_db_index_usage_stats.index_id
AND sys.indexes.object_id=sys.dm_db_index_usage_stats.object_id
AND sys.dm_db_index_usage_stats.database_id=DB_ID()
WHERE
sys.objects.type='u'
AND sys.schemas.name LIKE CASE WHEN @SchemaName='' THEn sys.schemas.name ELSE @SchemaName END
AND sys.objects.name LIKE CASE WHEN @TableName='' THEn sys.objects.name ELSE @TableName END
ORDER BY
CASE @Sort
WHEN 1 THEN
(
(
(CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_seeks,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_seeks,0)))*10
+ CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_scans,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_scans,0)))*1 ELSE 0 END
+ 1
)
/CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_updates,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_updates,0))+1) ELSE 1 END
)*-1
WHEN 2 THEN
(
(
(CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_seeks,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_seeks,0)))*10
+ CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_scans,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_scans,0)))*1 ELSE 0 END
+ 1
)
/CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_updates,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_updates,0))+1) ELSE 1 END
)
ELSE NULL
END,
CASE @Sort
WHEN 3 THEN sys.schemas.name
WHEN 4 THEN sys.schemas.name
WHEN 5 THEN sys.schemas.name
ELSE NULL
END,
CASE @Sort
WHEN 1 THEN CONVERT(VarChar(10), sys.dm_db_index_usage_stats.user_seeks*-1)
WHEN 2 THEN CONVERT(VarChar(10), sys.dm_db_index_usage_stats.user_seeks)
ELSE NULL
END,
CASE @Sort
WHEN 3 THEN sys.objects.name
WHEN 4 THEN sys.objects.name
WHEN 5 THEN sys.objects.name
ELSE NULL
END,
CASE @Sort
WHEN 1 THEN sys.dm_db_index_usage_stats.user_scans*-1
WHEN 2 THEN sys.dm_db_index_usage_stats.user_scans
WHEN 4 THEN
(
(
(CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_seeks,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_seeks,0)))*10
+ CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_scans,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_scans,0)))*1 ELSE 0 END
+ 1
)
/CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_updates,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_updates,0))+1) ELSE 1 END
)*-1
WHEN 5 THEN
(
(
(CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_seeks,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_seeks,0)))*10
+ CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_scans,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_scans,0)))*1 ELSE 0 END
+ 1
)
/CASE WHEN sys.indexes.type=2 THEN (CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.user_updates,0))+CONVERT(Numeric(19,6), ISNULL(sys.dm_db_index_usage_stats.system_updates,0))+1) ELSE 1 END
)
ELSE NULL
END,
CASE @Sort
WHEN 3 THEN sys.indexes.name
ELSE NULL
END
GO

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