Rebuild Indexes
Query to rebuild or reorganize depending on the fragmentation:
--Description : This script reorganizes and rebuilds the index if the fragmentation level is higher the given threshold -- You can define the threshold for reorganize as well as for rebuild and script will work accordingly -- INPUTS : @fillfactor - While rebuilding index what would be FILLFACTOR for new index -- @FragmentationThresholdForReorganizeTableLowerLimit - Fragmentation Level lower threshold to check for reorganizing the table, if the fragmentation is higher than this level, it will be considered for reorganize -- @@FragmentationThresholdForRebuildTableLowerLimit - Fragmentation Level lower threshold to check for rebuilding the table, if the fragmentation is higher than this level, it will be considered for rebuild -- NOTES : PRINT statements are all queued up and don't show up until the entire script is printed. However, there is an alternative to PRINTing messages. -- You can raise an error that isn't really an error (code of 0) and you'll get the same effect--message will be printed immediately. DECLARE @cmd NVARCHAR(1000) DECLARE @Table VARCHAR(255) DECLARE @SchemaName VARCHAR(255) DECLARE @IndexName VARCHAR(255) DECLARE @AvgFragmentationInPercent DECIMAL DECLARE @fillfactor INT DECLARE @FragmentationThresholdForReorganizeTableLowerLimit VARCHAR(10) DECLARE @FragmentationThresholdForRebuildTableLowerLimit VARCHAR(10) DECLARE @Message VARCHAR(1000) SET NOCOUNT ON --You can specify your customized value for reorganize and rebuild indexes, the default values --of 10 and 30 means index will be reorgnized if the fragmentation level is more than equal to 10 --and less than 30, if the fragmentation level is more than equal to 30 then index will be rebuilt SET @fillfactor = 90 SET @FragmentationThresholdForReorganizeTableLowerLimit = '10.0' -- Percent SET @FragmentationThresholdForRebuildTableLowerLimit = '30.0' -- Percent BEGIN TRY -- ensure the temporary table does not exist IF (SELECT OBJECT_ID('tempdb..#FramentedTableList')) IS NOT NULL DROP TABLE #FramentedTableList; SET @Message = 'DATE : ' + CONVERT(VARCHAR, GETDATE()) + ' - Retrieving indexes with high fragmentation from ' + DB_NAME() + ' database.' RAISERROR(@Message, 0, 1) WITH NOWAIT SELECT OBJECT_NAME(IPS.OBJECT_ID) AS [TableName], avg_fragmentation_in_percent, SI.name [IndexName], schema_name(ST.schema_id) AS [SchemaName], 0 AS IsProcessed INTO #FramentedTableList FROM sys.dm_db_index_physical_stats(DB_ID(), NULL, NULL, NULL , NULL) IPS JOIN sys.tables ST WITH (nolock) ON IPS.OBJECT_ID = ST.OBJECT_ID JOIN sys.indexes SI WITH (nolock) ON IPS.OBJECT_ID = SI.OBJECT_ID AND IPS.index_id = SI.index_id WHERE ST.is_ms_shipped = 0 AND SI.name IS NOT NULL AND avg_fragmentation_in_percent >= CONVERT(DECIMAL, @FragmentationThresholdForReorganizeTableLowerLimit) ORDER BY avg_fragmentation_in_percent DESC SET @Message = 'DATE : ' + CONVERT(VARCHAR, GETDATE()) + ' - Retrieved indexes with high fragmentation from ' + DB_NAME() + ' database.' RAISERROR(@Message, 0, 1) WITH NOWAIT RAISERROR('', 0, 1) WITH NOWAIT WHILE EXISTS ( SELECT 1 FROM #FramentedTableList WHERE IsProcessed = 0 ) BEGIN SELECT TOP 1 @Table = TableName, @AvgFragmentationInPercent = avg_fragmentation_in_percent, @SchemaName = SchemaName, @IndexName = IndexName FROM #FramentedTableList WHERE IsProcessed = 0 --Reorganizing the index IF((@AvgFragmentationInPercent >= @FragmentationThresholdForReorganizeTableLowerLimit) AND (@AvgFragmentationInPercent < @FragmentationThresholdForRebuildTableLowerLimit)) BEGIN SET @Message = 'DATE : ' + CONVERT(VARCHAR, GETDATE()) + ' - Reorganizing Index for [' + @Table + '] which has avg_fragmentation_in_percent = ' + CONVERT(VARCHAR, @AvgFragmentationInPercent) + '.' RAISERROR(@Message, 0, 1) WITH NOWAIT SET @cmd = 'ALTER INDEX ' + @IndexName + ' ON [' + RTRIM(LTRIM(@SchemaName)) + '].[' + RTRIM(LTRIM(@Table)) + '] REORGANIZE' EXEC (@cmd) --PRINT @cmd SET @Message = 'DATE : ' + CONVERT(VARCHAR, GETDATE()) + ' - Reorganize Index completed successfully for [' + @Table + '].' RAISERROR(@Message, 0, 1) WITH NOWAIT RAISERROR('', 0, 1) WITH NOWAIT END --Rebuilding the index ELSE IF (@AvgFragmentationInPercent >= @FragmentationThresholdForRebuildTableLowerLimit ) BEGIN SET @Message = 'DATE : ' + CONVERT(VARCHAR, GETDATE()) + ' - Rebuilding Index for [' + @Table + '] which has avg_fragmentation_in_percent = ' + CONVERT(VARCHAR, @AvgFragmentationInPercent) + '.' RAISERROR(@Message, 0, 1) WITH NOWAIT SET @cmd = 'ALTER INDEX ' + @IndexName + ' ON [' + RTRIM(LTRIM(@SchemaName)) + '].[' + RTRIM(LTRIM(@Table)) + '] REBUILD WITH (FILLFACTOR = ' + CONVERT(VARCHAR(3),@fillfactor) + ', STATISTICS_NORECOMPUTE = OFF)' EXEC (@cmd) --PRINT @cmd SET @Message = 'DATE : ' + CONVERT(VARCHAR, GETDATE()) + ' - Rebuild Index completed successfully for [' + @Table + '].' RAISERROR(@Message, 0, 1) WITH NOWAIT RAISERROR('', 0, 1) WITH NOWAIT END UPDATE #FramentedTableList SET IsProcessed = 1 WHERE TableName = @Table AND IndexName = @IndexName END DROP TABLE #FramentedTableList END TRY BEGIN CATCH PRINT 'DATE : ' + CONVERT(VARCHAR, GETDATE()) + ' There is some run time exception.' PRINT 'ERROR CODE : ' + CONVERT(VARCHAR, ERROR_NUMBER()) PRINT 'ERROR MESSAGE : ' + ERROR_MESSAGE() END CATCH