show variables

Requirements Description :I'm checking mysq today. For the connection number problem, you want to detect multiple values simultaneously with a show variables command. In this record.Operation Process :1. You can match multiple values or a value by

1. View MySQL server configuration informationMysql> Show variables;2. View the various status values running on the MySQL serverMysql> show global status;3, slow query1. mysql> show variables like ‘%slow%‘; 2. +------------------+-------+ 3. |

1.show Status View the real-time status of the system operation, so that the DBA can see the status of the current operation of MySQL, to make the corresponding optimization, dynamic, not considered modified, only the system automatically

Original address: http://www.2cto.com/database/201108/100546.htmlThe MYSQLD server maintains two variables. Global variables affect the global operation of the server. Session variables affect specific client connection-related operations.When the

A chance, show processlist time, found a Client has been executing "mysql-connector-java-5.1.21 (Revision: ${bzr.revision-id}) */show Varia Bles WHERE variable_name "After the discussion with the base friends, a little bit of a wisp. Probably the

Show variables different results under phpMyAdmin and CLS? Statement show variables like ' char% '; Why are the results different under the phpMyAdmin and CLS phpMyAdmin Variable_name ValueCharacter_set_client UTF8Character_set_connection

This article describes how to start and use a common query log instance in MySQL, including examples of basic operations such as backup and shutdown. For more information, see Enable general Log QueryGenerally, general query logs are not enabled for

Like most relational databases, log files are an important part of the MySQL database. MySQL has several different log files, usually including error log files, binary logs, generic logs, slow query logs, and so on. These logs can help us define

There are a lot of articles on the web to teach how to configure MySQL server, but considering the different server hardware configuration, the specific application of the difference, those articles can only be used as a preliminary setting

MySQL Cache Optimization (continued) and mysql Cache Optimization MySQL is cached everywhere. When can I read the MySQL source code and analyze in detail how the cache is used. This part mainly optimizes various explicit cache: Query Cache

One, the transaction logTransaction log: Transactional storage engine self-managing and usingThe transaction log is logged when a transaction has not yet been saved to disk, this time if the system loses power, the committed transaction redo (redo

Open a common query logthe general log will not open for performance reasons. Slow log can locate some performance-related SQL, and general log logs all of the SQL. mysql5.0 version, if you want to open slow log, general log, need to restart,

1.2 MySQL database character set knowledge1.2.1 MySQL database Character Set introductionSimply put, a set of text symbols and their encoding and comparison rules.The MySQL database character set includes two concepts: Character set (CHARACTER) and

MySQL Log System details All those who have done large systems know that the log function is not to be underestimated. In the middle and late stages of the project, the optimization and upgrade of the project are based on the log to make the upgrade

This article describes the MySQL backup and log, because the backup needs to use the log, so before the backup, if the log content is too long, will be the log and backup separately, the first simple introduction of MySQL log related content.MySQL

The profiling of MySQL optimization toolAfter using the slow query log to parse out the slow query statement, analyze the performance of the statement with profiling after optimization.View slow query settingsMysql> Show variables like "%slow%";+----

The MySQL system variable (variables) is actually a system parameter that initializes or sets the database's use of system resources, the location of files, and so on. These system variables can be divided into global and session-level levels to

Note the first wave of high-performance mysql A transaction is an atomic SQL query, or an independent unit of work.. If the database engine can successfully execute all the statements in the group, it will execute these statements. If any of the

Logs in MySQL include: error log, binary log, General query log, slow query log, and so on. Here is the main introduction of the more commonly used two features: General query log and slow query log.1) General query log: Records established client

Written in front This blog to take on a MySQL default engine InnoDB primary discussion (ii) continue to explore the MySQL database InnoDB storage engine InnoDB file MySQL database and InnoDB storage engine tables for various