autocommit

Recently learned a database of pessimistic lock and optimistic lock, according to their own understanding and online resources summarized as follows:Pessimistic lock Introduction (encyclopedia):Pessimistic locking, as its name implies, is a

Add by Zhj: In the MySQL5.6 of some parameters have been increased, see http://dev.mysql.com/doc/refman/5.6/en/server-system-variables.html Original:/http mageedu.blog.51cto.com/4265610/1062628 Marco Education Linux Operations training  autocommit={0

Mass Insert Data MyISAMALTER TABLE name disable keys;Load dataALTER TABLE name enable keys;*************************************An optimization of the large number of data insertions on InnoDB1. Because the representation of the INNDB type is saved

1.autoCommit (), commit (), rollback ()function autocommit ($onoff =false)Specifies whether the transaction is committed automatically. Some back-end databases are not supported.function commit ()Commit the current transactionfunction rollback

1) for MyISAM types of tables, you can quickly import large amounts of data in the following ways.ALTER TABLE tblname DISABLE KEYS;Loading the dataALTER TABLE tblname ENABLE KEYS;These two commands are used to open or close an update for a

Reprint Please specify source: http://blog.csdn.net/guoyjoe/article/details/48805847**********************************the management mechanism of MySQL lock**********************************some locks at MySQL server level? Table-level Locking

We can build a set of statements into a single transaction (transaction). When all statements are executed successfully, the transaction can commit (commit). Otherwise, if one of the statements encounters an error, the transaction is rolled back as

Spring,mybatis Transaction Management configuration and @transactional annotation usageOverviewTransaction management is critical for enterprise applications, and it guarantees data consistency even in the event of an exception.The Spring framework

There are two main ways to handle MySQL transactions. 1, with Begin,rollback,commit to achieve Begin a transactionROLLBACK TRANSACTION RollbackCommit TRANSACTION Confirmation 2, directly with the set to change the MySQL automatic submission mode

Interim solution Execute MySQL command: Show full processlist; Then find the system ID of the INSERT statement Execute mysql command: Kill ID On the network to find the relevant information, here are excerpts: First, review the process

Database Connection Pool Connection pooling is a common technique for resource reuse. With connection pooling, it is possible to pool the resources that have been created with greater overhead and to cache them in a pool that needs to be taken out

MySQL stored procedure's Affairs ChapterFour characteristics of the transaction:Acid:atomic (atomicity), consistent (consistency), Isolated (Independence), durable (persistence)MySQL's transactional support is not tied to the MySQL server itself,

MySQL is mainly used to deal with large-scale and high-complexity data. For example, in the Personnel Management system, you delete a person, you need to delete the basic information of the person, but also to delete the information related to the

Knowledge Point 10: Application of MySQL Transaction (21-22)why to introduce a transaction:Why introduce transactions to this technology? Now many of the software are multi-user, multi-program, multi-threaded. The same table may be used by many

"Transaction" a set of SQL statement action units, all SQL statements within the group, to complete a business .If the whole group succeeds, it means that all the operations in the group are successful;Conversely, if any one of these statements

Since the introduction of the InnoDB engine in MySQL, in MySQL support transactions, the transaction is a set of atomic query statements, but also a number of queries as a separate unit of work, usually by submitting a unit of work to complete the

First, JDBC Common interface, Class introductionJDBC provides a unified, database-independent API to execute SQL commands. The APIs commonly used classes and interfaces are as follows:DriverManagerManagement of the JDBC-driven service class, mainly

This article will introduce some ways to optimize MySQL design from various aspects.1. Optimizing SQL statements (1) Locating SQL statements that need to be optimized 1) Show status statistics SQL statement frequencyParameters that are counted

MyBatis openSession (), close (), and commit () underlying code profiling, mybatisopensession I. What did openSession do in the MyBatis tool class? Mybatis tool class 1 private static final String RESOURCE = "mybatis-config.xml"; 2 private static

There are two main methods to process MYSQL transactions.1. Use begin, rollback, and commit to implement Start a transactionRollback transaction rollbackCommit transaction validation2. directly use set to change the mysql automatic submission Mode