repair table

DROPPRIMAYDEY is used to cancel the primary index. Note: in earlier versions of MySQL, if there is no primary index, DROPPRIMARYKEY will cancel the first UNIQUE index in the table. This does not happen in MySQL5.1. If you use dr drop primay dey to

The process of server shutdown can be summarized as follows: 1. start and close the process 2. the server creates a thread as needed. 3. the server stops receiving new connections. 4. the server terminates the current activity. the storage engine is

Mysqlslowlog control reference official documentation: dev.mysql.comdocrefman5.6enslow-query-log.html ??? Can MySQL record that the execution time exceeds the parameter? Long_query_time? The SQL statement that sets the value is not recorded by

How to query slow SQL statements in MySQL 1. query logs (1) enabling MySQL slow query in Windows In Windows, the configuration file of MySQL is usually my. ini. find [mysqld] and add The code is as follows: Log-slow-queries =

Monty said MySQL optimization (IV) 16. how to store data in MySQL The database is stored in a directory. Tables are stored as files. Columns are stored in files in a variable-length or fixed-length format. For BDB tables, data is stored as

Mysql needs to pay attention to the first part of several SQL statements: Text 1. Insert batch data from one table to another table with the same structure Insert into table1 (select * from table2) 2. Insert a large number of SQL statements as

This article mainly introduces the solution that is still ineffective after phpmyadmin shows that the MySQL data table is "in use". if you need it, refer to the PHP + MySQL background. some program pages do not display the content, error message,

This article mainly introduces the MySQLload statement in detail. This article describes the basic syntax of load, file path, configuration options, STARTINGLINES options, TERMINATEDLINES options, and so on. For more information, see Load

When the '-O' option is not used, the compiler aims to reduce the compilation overhead and enable the compilation result to be debugged. The statement is independent: if the program is aborted using a breakpoint between two statements Download Page:

MySQL data corruption problem and repair on the 28th, I also complained in my blog, and I was busy with my work the day before yesterday. I didn't continue my work for two articles every month I insisted on, yesterday, I wanted to fill in the blank

MySQL4.0 update to mysql5.0 method bitsCN.com 1. major changes from 4.0 to 4.1 If an InnoDB table containing the TIMESTAMP field is created in MySQL from version 4.1.0 to version 4.1.3. You need to recreate the table when upgrading to 4.1.4 and

Comparison between MyISAM and Innodb: bitsCN. comMyISAM and Innodb Http://www.oschina.net/question/17_4248 Considerations for MySQL storage engine InnoDB, MyISAM, and row Lock2010-02-21 18:21 MyISAM is the default storage engine in MySQL. generally,

This article mainly introduces the SQL statements that run for a long time in batch killmysql. For more information, see KILL syntax KILL [CONNECTION | QUERY] thread_idEach connection to mysqld runs in an independent thread. you can use the show

Check and fix the specific mysql database table method bitsCN. com01 #! /Bin/sh 02 # Code by scpman 03 # Function: check and fix mysql database tables 04 # Add the script to the timer. when the script is executed, it will read the database, list all

Differences between engineinnodb and enginemyisam in mysql introduction bitsCN.com when MySQL Administrator is used to create a database, the table is of the InnoDB type by default, so it does not matter. Later, when using Access2MySQL to export

Solution to the increase in the number of mysql connections in case of unrecoverable Question Question: The mysql connection of the company's website exceeds the limit, and the website basically cannot be moved. after analyzing the traffic, it is

MySQLReplication feasibility analysis bitsCN.com MySQL Replication Feasibility Analysis AUTO_INCREMENT Version AUTO_INCREMENT column ALL Yes www.bitsCN.com Update AUTO_INCREMENT column by invoking a trigger or function! InnoDB No The

Mysql optimization configuration bitsCN.com Mysql optimization configuration I. environment introduction Mysql version: 5.5.27 II. Content Optimization Field Introduction Recommended value Skip-locking Avoid MySQL external locks, reduce the chance

Mysql monitoring methods are roughly divided into two categories: 1. connect to the mysql database and use showstatus, showvariables, and flushstatus to view various mysql performance indicators. 2. directly use mysqladmin to view its performance

There is a database online. In slowlog, there are a lot of records similar to the following: # Time: 13082313: 56: 08 # User @ Host: repl [repl] @ slave [10. x. x. x] # Query_time: 9.000833Lock _ time: 0.20.00rows _ sent: 1Rows_examined: