--To Find out fragmentation level of a given database --This query will give DETAILED information --CAUTION : It may take very long time, depending on the number of tables in the DB USE AdventureWorks GO SELECTobject_name(IPS.object_id)AS[TableName], SI.nameAS[IndexName], IPS.Index_typ...
5. Monitor fragmentation 6. Set up a maintenance plan to reorganize/rebuild indexes that are prone to fragmentation To find any database fragmentation you can run the various Disk Usage reports in the database right click in SSMS. Alternatively, you can use various SQL Server management views ...
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INSERT INTO testTB VALUES(@i,'20121026','testdata') set @i=@i+1 END 4)结合索引信息表sys_indexs我们做一个更详细的查询,可以看到索引碎片已经产生: --QUERY INDEX FRAGMENTATION INFO AGAIN SELECT DB_NAME(V1.database_id)as'Database Name', OBJECT_NAME(V1.object_id)as'Table Name', v2.na...
Logical Scan Fragmentation-逻辑扫描碎片:无序页的百分比。该百分比应该在0%到10%之间,高了则说明有外部碎片。Extent Scan Fragmentation-扩展盘区扫描碎片:无序扩展盘区在扫描索引叶级页中所占的百分比。该百分比应该是0%,高了则说明有外部碎片。Avg. Bytes Free per Page-每页上的平均可用字节数:所扫描的页上的...
DatabaseName ,[FileName] , CONVERT(VARCHAR(20), EndTime - StartTime, 114) ,StartTime ,EndTime ,FileType= CASE EventClass WHEN 92 THEN 'Data' WHEN 93 THEN 'Log' END FROM( SELECT pt=REVERSE(SUBSTRING(REVERSE([path]),CHARINDEX('\',REVERSE([path])),260))+N'log.trc' ...
索引或堆的碎片级别显示在 avg_fragmentation_in_percent 列中。对于堆,此值表示堆的区碎片。对于索引,此值表示索引的逻辑碎片。与 DBCC SHOWCONTIG 不同,这两种情况下的碎片计算算法都会考虑跨越多个文件的存储,因而结果是精确的。 逻辑碎片 这是索引的叶级页中出错页所占的百分比。对于出错页,分配给索引的下一个...
A shrink operation doesn't preserve the fragmentation state of indexes in the database, and generally increases fragmentation to a degree. This is another reason not to repeatedly shrink the database. Unless you have a specific requirement, don't set the AUTO_SHRINK database option to ON. ...
Migrate data from a self-managed SQL Server database to an ApsaraDB RDS for SQL Server instance,Data Transmission Service:This topic describes how to migrate data from a self-managed SQL Server database to an ApsaraDB RDS for SQL Server instance by using
Syntax for SQL Server: syntaxsql DBCCSHRINKDATABASE(database_name|database_id|0[ ,target_percent] [ , {NOTRUNCATE|TRUNCATEONLY} ] ) [WITH{ [WAIT_AT_LOW_PRIORITY[ (<wait_at_low_priority_option_list>)] ] [ ,NO_INFOMSGS] } ]< wait_at_low_priority_option_list >::=<wait_at_low_pr...