Record Locks

记录锁:

记录锁是一个锁在一个Index记录上,比如

SELECT c1 FOR UPDATE FROM t WHERE c1 = 10;

阻止任何其他事务inserting, updating, or deleting t.c1只为10的记录

记录锁总是lock index记录, 即使如果一个定义为没有索引。

在这种情况下,InnoDB 创建一个隐含的clustered index 使用这个索引用于记录locking

Record Locks的更多相关文章

  1. 转 MYSQL InnoDB Record, Gap, and Next-Key Locks

    http://dev.mysql.com/doc/refman/5.0/en/innodb-record-level-locks.html InnoDB has several types of re ...

  2. InnoDB Record, Gap, and Next-Key Locks

    InnoDB has several types of record-level locks including record locks, gap locks, and next-key locks ...

  3. 14.5.3 Locks Set by Different SQL Statements in InnoDB

    14.5.3 Locks Set by Different SQL Statements in InnoDB 通过不同的SQL语句设置的锁 在InnoDB中 一个锁定读, 一个UPDATE 或者一个D ...

  4. Shared and Exclusive Locks 共享和排它锁

    14.5 InnoDB Locking and Transaction Model InnoDB 锁和事务模型 14.5.1 InnoDB Locking 14.5.2 InnoDB Transact ...

  5. 14.3.3 Locks Set by Different SQL Statements in InnoDB 不同的SQL语句在InnoDB里的锁设置

    14.3.3 Locks Set by Different SQL Statements in InnoDB 不同的SQL语句在InnoDB里的锁设置 locking read, 一个UPDATE,或 ...

  6. InnoDB的锁机制浅析(二)—探索InnoDB中的锁(Record锁/Gap锁/Next-key锁/插入意向锁)

    Record锁/Gap锁/Next-key锁/插入意向锁 文章总共分为五个部分: InnoDB的锁机制浅析(一)-基本概念/兼容矩阵 InnoDB的锁机制浅析(二)-探索InnoDB中的锁(Recor ...

  7. Locks Set by Different SQL Statements in InnoDB

    A locking read, an UPDATE, or a DELETE generally set record locks on every index record that is scan ...

  8. 小白学习mysql 之 innodb locks

    Innodb 锁类型: Shared and Exclusive Locks Intention Locks Record Locks Gap Locks Next-Key Locks Insert ...

  9. Linux ERRNO

    摘自Linux-3.18.20的头文件include/uapi/asm-generic/errno-base.h和include/uapi/asm-generic/errno.h: #define E ...

随机推荐

  1. MySQL 的 read_buffer_size 参数是如何影响写缓冲和写性能的？

    Each thread // that does a sequential scan . The value of this variable should be a multiple of 4KB. ...

  2. git 工具

    https://www.kernel.org/pub/software/scm/git/ wget https://www.kernel.org/pub/software/scm/git/git-2. ...

  3. FastDFS配置说明（中英文）

    FastDFS配置说明 1)tracker.conf # is this config file disabled # false for enabled # true for disabled di ...

  4. iOS的内存管理

    在Objective-C 这种面向对象的语言里,内存管理是个重要的概念.要想用一门语言写出内存使用效率高而且又没有bug的代码,就得掌握其内存管理模型的种种细节. 一旦理解了这些规则,你就会发现,其实 ...

  5. 详细分析Orchard的Content、Drivers, Shapes and Placement 类型

    本文原文来自:http://skywalkersoftwaredevelopment.net/blog/a-closer-look-at-content-types-drivers-shapes-an ...

  6. [O] SQLite数据库报错：no such column

    在SQLite数据库创建语句增加列,运行后报错:no such column 在语法规范的前提下,即 //SQLite数据库创建,逗号与空格须严格 String CREATE_NOTE = " ...

  7. Use StringBuilder instead of String as possible as you can.

    If you are care a littile about the time your algorithm cost,you should notice that,you my use Strin ...

  8. mysql workbench 建表时 PK,NN,UQ,BIN,UN,ZF,AI解释

    mysql workbench 建表时 - PK: primary key (column is part of a pk) 主键 - NN: not null (column is nullable ...

  9. 10集合：List<T>,Dictionary<K,V>

    List<T>泛型集合 List<T>是C#中一种快捷.易于使用的泛型集合类型,使用泛型编程为编写面向对象程序增加了极大的效率和灵活性.   1.List<T>用法 ...

  10. Spring 创建bean的模式

    在默认情况下,spring创建bean是单例模式 scope="singleton ",还有一种方式为多例模式[prototype]     scope          sing ...