Each index record contains a 6-byte header. The header is used to link together consecutive records, and for row-level locking. Records in the clustered index contain fields for all user-defined columns. In addition, there is a 6-byte transaction ID field and a 7-byte roll pointer field....
Each index record contains a 6-byte header. The header is used to link together consecutive records, and for row-level locking. Records in the clustered index contain fields for all user-defined columns. In addition, there is a 6-byte transaction ID field and a 7-byte roll pointer field....
Re: row level lockingPosted by: Barrett Davis Date: August 19, 2008 12:53PM We have moved the forum for our row locking work to here: http://forums.topcoder.com/?module=Category&categoryID=3726 Please look in and help us create a solid Open Source contribution. Regards, Barrett...
Comment: Supports transactions, row-level locking, and foreign keys Transactions: YES XA: YES Savepoints: YES *** 5. row *** Engine: CSV Support: YES Comment: CSV storage engine Transactions: NO XA: NO Savepoints: NO 5 rows in set (0.00 sec) 或者采用第二种方法: mysql> SHOW VARIABLES...
Each index record contains a five-byte header that may be preceded by a variable-length header. The header is used to link together consecutive records, and also in row-level locking. 每个索引记录包含一个五字节的头,在它之前还有一个变长的头。这个头是用来连接连续的记录,也用于行级锁。
mysql-batch Updating or deleting a large amount of rows in MySQL will create locks that will paralyze other queries running in parallel. This tool will run UPDATE and DELETE queries in small batches to prevent table-level and row-level locking (with InnoDB). If a large number of rows has ...
1. 每个index 记录包含一个6字节的header,header 是用于把连续的记录连接起来,也用于 row-level locking. 2.记录在 clustered index 包含字段用于所有用户定义的列,此外,有一个6个字节的 transaction ID field 和一个7个字节的指针字段 3.如果一个表没有定义主键, 每个clustered index record 也包含一个6字节的...
Each index record contains a five-byte header that may be preceded by a variable-length header. The header is used to link together consecutive records, and also in row-level locking. 每个索引记录包含一个五字节的头,在它之前还有一个变长的头。这个头是用来连接连续的记录,也用于行级锁。
header. The header is used to link together consecutive records, and also in row-level locking.每个索引记录包含⼀个五字节的头，在它之前还有⼀个变长的头。这个头是⽤来连接连续的记 录，也⽤于⾏级锁。The record header contains a bit vector for indicating NULL columns. The bit vector ...
Re: row level locking 5450 KimSeong Loh September 09, 2008 07:42PM Sorry, you can't reply to this topic. It has been closed. This forum is currently read only. You can not log in or make any changes. This is a temporary situation. ...