WSUSサーバのインデックス再構築スクリプト

WSUSサーバのインデックス再構築スクリプトを残しておきます。

元々はMicrosoftが公式で公開していたのですが、2018年1月末あたりに記事が削除されてしまいました。

・公式のWSUSサーバのインデックス再構築記事

https://blogs.technet.microsoft.com/jpwsus/2014/03/05/wsus-db/

上記ページ内のスクリプト記載記事のリンクに飛ぶとSorryページが返されてしまいます。

削除された理由は不明です。

よって、WSUS管理者が本番環境で使用する場合は自己責任でお願い致します。

何か都合の悪い事があって削除された可能性もあります。

過去に使用していて問題が発生していなくても潜在している可能性があるので慎重にお願い致します。

インデックス再構築スクリプト

USE SUSDB;
GO
SET NOCOUNT ON;

-- Rebuild or reorganize indexes based on their fragmentation levels
DECLARE @work_to_do TABLE (
objectid int
, indexid int
, pagedensity float
, fragmentation float
, numrows int
)

DECLARE @objectid int;
DECLARE @indexid int;
DECLARE @schemaname nvarchar(130);
DECLARE @objectname nvarchar(130);
DECLARE @indexname nvarchar(130);
DECLARE @numrows int
DECLARE @density float;
DECLARE @fragmentation float;
DECLARE @command nvarchar(4000);
DECLARE @fillfactorset bit
DECLARE @numpages int

-- Select indexes that need to be defragmented based on the following
-- * Page density is low
-- * External fragmentation is high in relation to index size
PRINT 'Estimating fragmentation: Begin. ' + convert(nvarchar, getdate(), 121)
INSERT @work_to_do
SELECT
f.object_id
, index_id
, avg_page_space_used_in_percent
, avg_fragmentation_in_percent
, record_count
FROM
sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, 'SAMPLED') AS f
WHERE
(f.avg_page_space_used_in_percent < 85.0 and f.avg_page_space_used_in_percent/100.0 * page_count < page_count - 1)
or (f.page_count > 50 and f.avg_fragmentation_in_percent > 15.0)
or (f.page_count > 10 and f.avg_fragmentation_in_percent > 80.0)

PRINT 'Number of indexes to rebuild: ' + cast(@@ROWCOUNT as nvarchar(20))

PRINT 'Estimating fragmentation: End. ' + convert(nvarchar, getdate(), 121)

SELECT @numpages = sum(ps.used_page_count)
FROM
@work_to_do AS fi
INNER JOIN sys.indexes AS i ON fi.objectid = i.object_id and fi.indexid = i.index_id
INNER JOIN sys.dm_db_partition_stats AS ps on i.object_id = ps.object_id and i.index_id = ps.index_id

-- Declare the cursor for the list of indexes to be processed.
DECLARE curIndexes CURSOR FOR SELECT * FROM @work_to_do

-- Open the cursor.
OPEN curIndexes

-- Loop through the indexes
WHILE (1=1)
BEGIN
FETCH NEXT FROM curIndexes
INTO @objectid, @indexid, @density, @fragmentation, @numrows;
IF @@FETCH_STATUS < 0 BREAK;

SELECT
@objectname = QUOTENAME(o.name)
, @schemaname = QUOTENAME(s.name)
FROM
sys.objects AS o
INNER JOIN sys.schemas as s ON s.schema_id = o.schema_id
WHERE
o.object_id = @objectid;

SELECT
@indexname = QUOTENAME(name)
, @fillfactorset = CASE fill_factor WHEN 0 THEN 0 ELSE 1 END
FROM
sys.indexes
WHERE
object_id = @objectid AND index_id = @indexid;

IF ((@density BETWEEN 75.0 AND 85.0) AND @fillfactorset = 1) OR (@fragmentation < 30.0)
SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REORGANIZE';
ELSE IF @numrows >= 5000 AND @fillfactorset = 0
SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD WITH (FILLFACTOR = 90)';
ELSE
SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD';
PRINT convert(nvarchar, getdate(), 121) + N' Executing: ' + @command;
EXEC (@command);
PRINT convert(nvarchar, getdate(), 121) + N' Done.';
END

-- Close and deallocate the cursor.
CLOSE curIndexes;
DEALLOCATE curIndexes;

IF EXISTS (SELECT * FROM @work_to_do)
BEGIN
PRINT 'Estimated number of pages in fragmented indexes: ' + cast(@numpages as nvarchar(20))
SELECT @numpages = @numpages - sum(ps.used_page_count)
FROM
@work_to_do AS fi
INNER JOIN sys.indexes AS i ON fi.objectid = i.object_id and fi.indexid = i.index_id
INNER JOIN sys.dm_db_partition_stats AS ps on i.object_id = ps.object_id and i.index_id = ps.index_id

PRINT 'Estimated number of pages freed: ' + cast(@numpages as nvarchar(20))
END
GO

--Update all statistics
PRINT 'Updating all statistics.' + convert(nvarchar, getdate(), 121)
EXEC sp_updatestats
PRINT 'Done updating statistics.' + convert(nvarchar, getdate(), 121)
GO