--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
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