kurthatlevik: SQL script for rebuild/reindex indexes for Dynamics AX 2012

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Источник: http://kurthatlevik.wordpress.com/20...amics-ax-2012/
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I often use my blog as a personal archive, and this post is for me to quickly find a script I use at customers that have not set up a proper SQL maintenance plan for indexes and statistics. This script will evaluate each index in the database, and determine if it should be reindexed or rebuilt based on how fragmented they are.

I have very good experience in doing this, and it really increases performance the Dynamics AX 2012 databases.



-- Ensure a USE statement has been executed first.SET NOCOUNT ON;DECLARE @objectid int;DECLARE @indexid int;DECLARE @partitioncount bigint;DECLARE @schemaname nvarchar(130); DECLARE @objectname nvarchar(130); DECLARE @indexname nvarchar(130); DECLARE @partitionnum bigint;DECLARE @partitions bigint;DECLARE @frag float;DECLARE @command nvarchar(4000); -- Conditionally select tables and indexes from the sys.dm_db_index_physical_stats function -- and convert object and index IDs to names.SELECT object_id AS objectid, index_id AS indexid, partition_number AS partitionnum, avg_fragmentation_in_percent AS fragINTO #work_to_doFROM sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL , NULL, 'LIMITED')WHERE avg_fragmentation_in_percent > 10.0 AND index_id > 0;-- Declare the cursor for the list of partitions to be processed.DECLARE partitions CURSOR FOR SELECT * FROM #work_to_do;-- Open the cursor.OPEN partitions;-- Loop through the partitions.WHILE (1=1) BEGIN; FETCH NEXT FROM partitions INTO @objectid, @indexid, @partitionnum, @frag; IF @@FETCH_STATUS < 0 BREAK; SELECT @objectname = QUOTENAME(o.name), @schemaname = QUOTENAME(s.name) FROM sys.objects AS o JOIN sys.schemas as s ON s.schema_id = o.schema_id WHERE o.object_id = @objectid; SELECT @indexname = QUOTENAME(name) FROM sys.indexes WHERE object_id = @objectid AND index_id = @indexid; SELECT @partitioncount = count (*) FROM sys.partitions WHERE object_id = @objectid AND index_id = @indexid;-- 30 is an arbitrary decision point at which to switch between reorganizing and rebuilding. IF @frag < 30.0 SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REORGANIZE'; IF @frag >= 30.0 SET @command = N'ALTER INDEX ' + @indexname + N' ON ' + @schemaname + N'.' + @objectname + N' REBUILD'; IF @partitioncount > 1 SET @command = @command + N' PARTITION=' + CAST(@partitionnum AS nvarchar(10)); EXEC (@command); PRINT N'Executed: ' + @command; END;-- Close and deallocate the cursor.CLOSE partitions;DEALLOCATE partitions;-- Drop the temporary table.DROP TABLE #work_to_do;GO



Источник: http://kurthatlevik.wordpress.com/20...amics-ax-2012/