set autocommit

Set autocommit=0 refers to a transaction that is not automatically committed, since the execution of this sentence, each SQL statement or statement block the transaction needs to display "commit" to commit the transaction.1, whether autocommit is 1

Difference between set autocommit = 0 and start transaction in mysql, setautocommit0   By default, MySQL runs with autocommit mode enabled. This means that as soon as you execute a statement that updates (modifies) a table, MySQL stores the update

Http://www.iteye.com/topic/494179 In the sprint + hibernate application, you monitor MySQL logs and find a large number of logs as follows: Java code 158268 query set autocommit = 1 158268 query set autocommit = 1 158268 query set autocommit = 1 1582

InnoDB How to implement a row lockInnoDB row locks are implemented by locking the index entries on the index, which is different from Oracle, which is achieved by locking the corresponding data rows in the data block. InnoDB This type of row lock

Here is the MHA from boot, to failover's complete manager.log, and all of the MySQL General.log in the cluster. We can learn more about the workings of MHA through these logs. There is a lot of help in using good MHA.The architecture is as

MysqlInnoDB row lock implementation method bitsCN.com Mysql InnoDB row lock implementation method InnoDB row lock is implemented by locking the index items on the index. this is different from Oracle in MySQL, the latter is implemented by locking

Mysqldump backup principle mysqldump in the backup process, is to use the query to back up the relevant table data, and then export, stitching into the form of INSERT statements for backup.   about the--single-transaction

Mysql InnoDB row lock implementation method InnoDB row lock is implemented by locking the index items on the index. This is different from Oracle in MySQL, the latter is implemented by locking the corresponding data rows in the data block. The

MySQL transactions and views, MySQL transaction views 　　　　　　　　　　　　　　　　Transactions 1. Concept A set of one or more SQL statements!Transactions: a collection of operations. They are born together. Either the execution is successful or the execution

Recent projects, as it relates to the use of optimistic and pessimistic locks in MySQL data, summarize the knowledge of optimistic and pessimistic locks in conjunction with project and online knowledge points.Pessimistic Lock IntroductionPessimistic

Mysql InnoDB Line Lock Implementation method innodb row locks are implemented by locking the index entries on the index, which is different from Oracle, which is achieved by locking the corresponding data rows in the data block. InnoDB This type of

Mysql InnoDB Line Lock Implementation method innodb row locks are implemented by locking the index entries on the index, which is different from Oracle, which is achieved by locking the corresponding data rows in the data block. InnoDB This type of

MySQL two table storage structures: MyISAM and InnoDB performance comparison test, myisaminnodb Reproduced http://www.jb51.net/article/5620.htm  MySQL supports two main table storage formats: MyISAM and InnoDB. InnoDB was used for a project last

MySQL, as the most popular free database service engine, has been popular for a long time. However, some people may not know much about the internal environment of MySQL, especially those mechanisms for concurrent processing. Today, let's take a

---- 1. Compile and install percona-xtrabackup Yum install cmake gcc-c ++ libaio-devel automake autoconf bzr \Bison libtool ncurses-devel zlib-devel libgcrypt-devel Wget

MySQL supports two main table storage formats: MyISAM and InnoDB. InnoDB was used for a project last month. The results are very slow and only a dozen pieces can be inserted in one second. Later I changed to MyISAM format and inserted tens of

[Arrangement] MySQL autocommit bitsCN.com [Arrangement] MySQL autocommit By default, mysql enables auto commit. You can run the following command to view the settings at the session level and global level: 01mysql> select @@session.autocommit;02+-

mysql_query ("Begin");//Start a transaction mysql_query ("SET autocommit=0"); Set transaction not automatic commit $insert = "INSERT INTO UserInfo VALUES (' aa12 ', ' AA ', ' 1 ', ' aaa ')"; mysql_query ($insert); mysql_query

---- 1. Compile and install percona-xtrabackupyuminstallcmakegccgcc-c ++ libaiolibaio-develautomakeautoconfbzrbisonlibtoolncurses-develzlib-devellibgcrypt-develwgetwww.percona.comdownloadsXtraBackupXtraBackup-2.1.9sourceperc ---- 1. Compile and

What is a transaction?In the MySQL environment, a transaction is composed of one or more SQL statements as a separate unit. Each SQL statement in this unit is mutually dependent, and the unit as a whole is inseparable. If a statement in a unit