SELECT index_id,index_type_desc,avg_fragmentation_in_percent,page_count FROM sys.dm_db_index_physical_stats (db_id(), OBJECT_ID('t3'), NULL, NULL , 'LIMITED'); alter index t3index on t3 rebuild 显示出来了! 结论: SQL Server在执行相关的操作的时候都会智能去判断是否值得去做,比如在页面数...
NULL,NULL,NULL,'LIMITED')WHEREavg_fragmentation_in_percent>10.0ANDindex_id>0;使用脚本中的 sys.dm_db_index_physical_stats 重新生成或重新组织索引 (来源于联机帮助)SETNOCOUNTON;DECLARE@objectid int;DECLARE@indexid int;DECLARE@partitioncount bigint;DECLARE@schema...
' (SELECT OBJECT_ID,INDEX_ID,AVG_FRAGMENTATION_IN_PERCENT,AVG_PAGE_SPACE_USED_IN_PERCENT '+ ' FROM SYS.DM_DB_INDEX_PHYSICAL_STATS(DB_ID('''+@DBNAME+'''),'+@TABLEIDCHAR+ ',NULL,NULL,''LIMITED'') WHERE INDEX_ID<>0) AS DT INNER JOIN SYS.INDEXES SI'+ ' ON SI.OBJECT_ID=DT....
INSERT INTO #FRAGLIST EXEC ('SELECT OBJECT_NAME(DT.OBJECT_ID) AS TABLENAME,SI.NAME AS INDEXNAME FROM '+ ' (SELECT OBJECT_ID,INDEX_ID,AVG_FRAGMENTATION_IN_PERCENT,AVG_PAGE_SPACE_USED_IN_PERCENT '+ ' FROM SYS.DM_DB_INDEX_PHYSICAL_STATS(DB_ID('''+@DBNAMECHAR+'''),object_id('''+...
If index page locks are disabled using ALLOW_PAGE_LOCKS=OFF, online index rebuild can increase index fragmentation when it runs with MAXDOP greater than 1. For more information, see How It Works: Online Index Rebuild - Can Cause Increased Fragmentation....
Online index operations aren't available in every edition of Microsoft SQL Server. For a list of features that are supported by the editions of SQL Server, see Editions and supported features of SQL Server 2022. The following table shows the index operations that can be performed online, the ...
SQL SERVER提供了两种索引:聚集索引(Clustered Index)和非聚集索引(Nonclustered Index)。 3. 认识索引的二叉树(索引B树)及级数 SQL Server中所有的索引都是平衡二叉树结构,平衡树的意思是所有叶子节点到根节点的距离都相同,SQL Server进行索引查找时总是从索引的根节点开始,并从根跳到下一级的相应页,并继续从一...
This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting, and reorders the index rows in contiguous pages. When ALL is specified, all indexes on the table are dropped and rebuilt in a single transaction. Foreign key ...
8075 Reduces VAS fragmentation when you receive memory page allocation errors on a 64-bit SQL Server 2012 (11.x) or SQL Server 2014 (12.x). For more information, see KB3074434.Applies to: SQL Server 2012 (11.x), SQL Server 2014 (12.x) RTM CU 10, and SQL Server 2014 (12.x) Se...
This removes fragmentation, reclaims disk space by compacting the pages based on the specified or existing fill factor setting, and reorders the index rows in contiguous pages. When ALL is specified, all indexes on the table are dropped and rebuilt in a single transaction. Foreign key ...