Источник:
https://dynamicsaxinsight.wordpress....table-indexes/
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Purpose:
The purpose of this blog post is to document how can we rebuild or reorganize table indexes to improve performance of Dynamics AX 2012.
Product:
Dynamics AX 2012
Solution:
The following script gives us index fragmentation details.
Use select s.database_id, s.index_id, b.name, s.avg_fragmentation_in_percentfrom sys.dm_db_index_physical_stats (DB_ID(), NULL, NULL, NULL, NULL) AS sinner join sys.indexes as bon s.object_id = b.object_id and s.index_id = b.index_idwhere s.database_id = DB_ID()order by s.avg_fragmentation_in_percent descThe following script rebuilds or reorganizes table indexes
USE -- 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:
https://dynamicsaxinsight.wordpress....table-indexes/