PC関係

WSUSのデータベースサーバのインデックス再構築スクリプト

WSUSのデータベースサーバのインデックス再構築スクリプト

SQL Server Management StudioでWSUSのデータベースに接続し、

以下のクエリを実行します。
2019年4月現在Microsoftのページから、このクエリが削除されました。
理由は分かりませんが、何かしらのバグがあるのかもしれません。

実行する場合は責任でお願いします。

ただ、私は何度もこのクエリを実行していますが、今まで問題が

起きたことはありません。

/****************************************************************************** This sample T-SQL script performs basic maintenance tasks on SUSDB 1. Identifies indexes that are fragmented and defragments them. For certain tables, a fill-factor is set in order to improve insert performance. Based on MSDN sample at http://msdn2.microsoft.com/en-us/library/ms188917.aspx and tailored for SUSDB requirements 2. Updates potentially out-of-date table statistics. ******************************************************************************/ 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