Nav developer: Table Information including Index information (Usage, Blocks and Reads) - Dynamics CRM: Blogs

Blog bot · 25.08.2009, 19:34

The query below combines these three queries into one:Index Usage Query Recent Bocking History Table Information Query It can be used to just see the number of records in each table. But also by just changing "ORDER BY", it can be used to see which index cause most blocking / wait time / updates or locks. Or to compare Index Updates with Index Reads to get an idea of cost versus benefit for each index for the purpose of index tuning.So in short, one query gives you: - Index / Table Information - Index usage (benefits and costs information for each index) - Index locks, blocks, wait time and updates per read (cost/benefit). The query must be run in your NAV database. It will create a table called z_IUQ2_Temp_Index_Keys and use various Dynamic Management Views to collect information for each index into this table. First time you run it, or if you want to refresh data, you must run the whole query which may take up to a minute of two for each company in the database. After that if you just want to change sorting / get the results again, then you only need to run the last part of the query, beginning with:-- Select resultsThe last lines suggest various "ORDER BY"s that might be useful to enable instead of the default one, which is by Table Name. Lars Lohndorf-Larsen Microsoft Dynamics UK Microsoft Customer Service and Support (CSS) EMEA These postings are provided "AS IS" with no warranties and confer no rights. You assume all risk for your use. --use NavisionDatabaseIF OBJECT_ID ('z_IUQ2_Temp_Index_Keys', 'U') IS NOT NULLDROP TABLE z_IUQ2_Temp_Index_Keys;-- Generate list of indexes with key listcreate table z_IUQ2_Temp_Index_Keys([l1] [int] NOT NULL,[F_Obj_ID] [int] NOT NULL,[F_Schema_Name] [nvarchar] (128) NULL,[F_Table_Name] [nvarchar] (128) NOT NULL,[F_Row_Count] [int] NULL,[F_Reserved] [int] NULL,[F_Data] [int] NULL,[F_Index_Size] [int] NULL,[F_UnUsed] [int] NULL,[F_Index_Name] [nvarchar] (128) NOT NULL,[F_Index_ID] [int] NOT NULL,[F_Column_Name] [nvarchar] (128) NOT NULL,[F_User_Updates] [int] NULL,[F_User_Reads] [int] NULL,[F_Locks] [int] NULL,[F_Blocks] [int] NULL,[F_Block_Wait_Time] [int] NULL,[F_Last_Used] [datetime] NULL,[F_Index_Type] [nvarchar] (128) NOT NULL,[F_Index_Column_ID] [int] NOT NULL,[F_Last_Seek] [datetime] NULL,[F_Last_Scan] [datetime] NULL,[F_Last_Lookup] [datetime] NULL,[Index_Key_List] [nvarchar] (MAX) NULL)goCREATE NONCLUSTERED INDEX [Object_ID_Index] ON [dbo].[z_IUQ2_Temp_Index_Keys]([F_Obj_ID] ASC)goCREATE NONCLUSTERED INDEX [Index_ID_Index] ON [dbo].[z_IUQ2_Temp_Index_Keys]([F_Index_ID] ASC)goCREATE NONCLUSTERED INDEX [RowCount_ID_Index] ON [dbo].[z_IUQ2_Temp_Index_Keys]([F_Row_Count] ASC)go insert into z_IUQ2_Temp_Index_KeysSELECT(row_number() over(order by a3.name, a2.name))%2 as l1,a1.object_id,a3.name AS [schemaname],a2.name AS [tablename],a1.rows as row_count,(a1.reserved + ISNULL(a4.reserved,0))* 8 AS reserved, a1.data * 8 AS data,(CASE WHEN (a1.used + ISNULL(a4.used,0)) > a1.data THEN (a1.used + ISNULL(a4.used,0)) - a1.data ELSE 0 END) * 8 AS index_size,(CASE WHEN (a1.reserved + ISNULL(a4.reserved,0)) > a1.used THEN (a1.reserved + ISNULL(a4.reserved,0)) - a1.used ELSE 0 END) * 8 AS unused,-- Index DescriptionSI.name,SI.Index_ID,index_col(object_name(SIC.object_id),SIC.index_id,SIC.Index_Column_ID),-- Index StatsUS.user_updates,US.user_seeks + US.user_scans + US.user_lookups User_Reads,-- Index blocksIStats.row_lock_count + IStats.page_lock_count ,IStats.row_lock_wait_count + IStats.page_lock_wait_count,IStats.row_lock_wait_in_ms + IStats.page_lock_wait_in_ms,-- Datescasewhen (ISNULL(US.last_user_seek,'00:00:00.000') >= ISNULL(US.last_user_scan,'00:00:00.000')) and (ISNULL(US.last_user_seek,'00:00:00.000') >= ISNULL(US.last_user_lookup,'00:00:00.000')) then US.last_user_seekwhen (ISNULL(US.last_user_scan,'00:00:00.000') >= ISNULL(US.last_user_seek,'00:00:00.000')) and (ISNULL(US.last_user_scan,'00:00:00.000') >= ISNULL(US.last_user_lookup,'00:00:00.000')) then US.last_user_scan else US.last_user_lookupend as Last_Used_For_Reads,SI.type_desc,SIC.index_column_id,US.last_user_seek,US.last_user_scan,US.last_user_lookup,''FROM(SELECT ps.object_id,SUM (CASEWHEN (ps.index_id < 2) THEN row_countELSE 0END) AS [rows],SUM (ps.reserved_page_count) AS reserved,SUM (CASEWHEN (ps.index_id < 2) THEN (ps.in_row_data_page_count + ps.lob_used_page_count + ps.row_overflow_used_page_count)ELSE (ps.lob_used_page_count + ps.row_overflow_used_page_count)END) AS data,SUM (ps.used_page_count) AS usedFROM sys.dm_db_partition_stats psGROUP BY ps.object_id) AS a1LEFT OUTER JOIN (SELECT it.parent_id,SUM(ps.reserved_page_count) AS reserved,SUM(ps.used_page_count) AS usedFROM sys.dm_db_partition_stats psINNER JOIN sys.internal_tables it ON (it.object_id = ps.object_id)WHERE it.internal_type IN (202,204)GROUP BY it.parent_id) AS a4 ON (a4.parent_id = a1.object_id)INNER JOIN sys.all_objects a2 ON ( a1.object_id = a2.object_id ) INNER JOIN sys.schemas a3 ON (a2.schema_id = a3.schema_id)inner join sys.indexes SI ON (SI.object_id = a1."object_id")inner join sys.index_columns SIC ON (SIC.object_id = SI.object_id and SIC.index_id = SI.index_id)left outer join sys.dm_db_index_usage_stats US ON (US.object_id = SI.object_id and US.index_id = SI.index_id and US.database_id = db_id())left outer join sys.dm_db_index_operational_stats(NULL,NULL,NULL,NULL) IStats ON (IStats.object_id = SI.object_id and IStats.index_id = SI.index_id and IStats.database_id = db_id())WHERE a2.type <> N'S' and a2.type <> N'IT'order by row_count descgo-- Populate key stringdeclare IndexCursor cursor forselect F_Obj_ID, F_Index_ID from z_IUQ2_Temp_Index_Keysfor update of Index_Key_Listdeclare @objID intdeclare @IndID intdeclare @KeyString VARCHAR(MAX)set @KeyString = NULLopen IndexCursorset nocount onfetch next from IndexCursor into @ObjID, @IndIDwhile @@fetch_status = 0 beginset @KeyString = ''select @KeyString = COALESCE(@KeyString,'') + F_Column_Name + ', 'from z_IUQ2_Temp_Index_Keyswhere F_Obj_ID = @ObjID and F_Index_ID = @IndIDORDER BY F_Index_ID, F_Index_Column_IDset @KeyString = LEFT(@KeyString,LEN(@KeyString) -2)update z_IUQ2_Temp_Index_Keysset Index_Key_List = @KeyStringwhere current of IndexCursorfetch next from IndexCursor into @ObjID, @IndIDend;close IndexCursordeallocate IndexCursorgo-- clean up table to one line per indexdelete from z_IUQ2_Temp_Index_Keyswhere [F_Index_Column_ID] > 1go-- Select resultsselect[F_Table_Name] TableName,[F_Row_Count] No_Of_Records,[F_Data] Data_Size,[F_Index_Size] Index_Size,[F_Index_Name] Index_Name,[F_User_Updates] Index_Updates,[F_User_Reads] Index_Reads,casewhen F_User_Reads = 0 then F_User_Updateselse F_User_Updates / F_User_Readsend as Updates_Per_Read,[F_Locks] Locks,[F_Blocks] Blocks,[F_Block_Wait_Time] Block_Wait_Time,[F_Last_Used] Index_Last_Used,[F_Index_Type] Index_Type,[Index_Key_List] Index_Fieldsfrom z_IUQ2_Temp_Index_Keys--order by F_Row_Count desc, F_Table_Name, [F_Index_ID]--order by F_User_Updates desc--order by Blocks desc--order by Block_Wait_Time desc--order by Updates_Per_Read descorder by F_Table_Name[/size] [size="2"]