第四个参数:该参数是为兼容sql server 2000,是可选的;用于指定一个分区号,如果不给定值或者给定0, 则显示全部分区数据。 和DBCC PAGE不同的是, SQL Server运行DBCC IND不需要开启3604跟踪标志. 我们来执行下列的命令: DBCC IND('InternalStorageFormat','Customers',-1) SQL Server会给我们如下的输出结果: 可...
node (nonleaf) level for clustered indexes, and node level for nonclustered indexes. There isn't really a separate structure for leaf level pages of a clustered index because those are the data pages, which we've already seen in detail. There is, however, one special case for leaf-level ...
node (nonleaf) level for clustered indexes, and node level for nonclustered indexes. There isn't really a separate structure for leaf level pages of a clustered index because those are the data pages, which we've already seen in detail. There is, however, one special case for leaf-level ...
DBCC INDEXDEFRAG is a has been announced to be deprecated for more than 10 years ago, meaning it may disappear in future versions of SQL Server. DBCC INDEXDEFRAG is a database console command (DBCC) in Microsoft SQL Server that can be used to defragment the indexes of a database. Defragm...
在<inside sql server 2005:storage engine>的第七章的The Structure of Index Pages小结中提到了索引页的结构。本文将通过实验来描述索引页的结构,然后通过索引页的结构来更加深刻清晰得描述聚集索引、非聚集索引和多结构。 ---实验:查看索引页,推到聚集索引非聚集索引结构--- use TESTDB3 --1.创建表,有主键...
3、在一个准确的IAM页中被标记作GAM间隔的封面(Marked in exactly one of the IAM pages that cover the GAM interval) 4、没有被标记为分配位图的任何一个。 下表列出了可能的组合:Possible Combinations of Allocation Bitmaps GAM SGAM IAM Legal Meaning Error 0 0 0 Y Mixed extent with all pages allo...
First of all, the transaction log is "circular," meaning that portions of it (virtual log files or VLFs for short) can be reused once they are no longer needed. Marking a VLF for reuse is called "clearing" or "truncating" the transaction log. If XYZ is in the Simple recovery model,...
When was the most recent clean CHECKDB? (Meaning, when did CHECKDB run against this database without errors?) ___ Do we have a full backup available from prior to that date? (For example, if CHECKDB said this database was okay on January 15th at 10PM, what’s the latest backup we...
The exact meaning of "Executions/Min" in SQL Server 2008 Activity Monitor The file or directory is corrupted or unreadable The job was stopped prior to completion by Shutdown Sequence 0. The log scan number passed to log scan in database 'master' is not valid. The MSSQLSERVER service te...
dbcc REPAIR_ALLOW_DATA_LOSS