MySQL

Test Reason  Why do I need to do performance testing Simulate a higher load than the current system to identify performance bottlenecks Reproduce an on-line exception Testing different hardware software configurations Plan

Linux full-schedule task for MySQL _shell small script for MySQL with smaller data size.#!/bin/bashPort= ' 5001 'User= ' admin 'Passwd= ' admin 'Socked= "/data/socket/mysql${port}.sock"backup_file= ' /data/mysql/backup ' #注意磁盘空间情况backup_save_days= '

Semi-synchronous replicationMySQL's master-slave replication only supports asynchronous replication before the 5.5 release, meaning that the main library performs some transactions, regardless of the progress of the library from the repository, this

Reprinted from Http://www.jb51.net/article/40179.htmFirst, mathematical functionsABS (x) returns the absolute value of XBIN (x) returns the binary of X (Oct returns octal, HEX returns hex)CEILING (x) returns the smallest integer value greater than

daily operation and maintenance DBA Operations Work Daily Guide data, data modification, table structure change Add permissions, problem handling Other Database selection, deployment, design, monitoring, backup,

Accessing the local MySQL database error when installing the lamp environment recentlyThe error is as follows:Warning:mysqli::mysqli (): (hy000/2002): Can ' t connect to local MySQL serverProblem Description:The installation of the MySQL server file

Linux using Mysqladmin extended-status with Linux commands to view MySQL running statusmysqladmin -uroot -ppassword -s /tmp/mysql_3306.sock -r -i 1 -c  10 ext |awk -f "|"   "BEGIN{COUNT=0;}" ' { if ($2 ~ /variable_name/ && ++count  == 1) {    print 

Let MySQL support emoji emoticons, involving wireless-related MySQL database recommendations are in advance with the UTF8MB4 character set.What's the difference between utf8mb4 and UTF8? The original MySQL UTF8 a character up to 3 bytes, while the

The following applies to the [MYSQLD] paragraph Server-id= 1 This line must be, 1 can be other numbers, generally recommended is the IP last segment. Log-bin=mysql-bin must have this, to turn on Binlog binary required. Binlog-do-db=abc

The official description of the three main APIs that PHP connects to the MySQL database server is as follows:http://php.net/manual/zh/mysqli.overview.phpPHP MySQL and mysqli transactionsIn PHP, MYSQLI has already encapsulated the operation of MySQL

First, user management:1. New User: >create USER name identified by ' Ssapdrow '; 2. Change Password: >set PASSWORD for Name=password (' FDDDFD '); 3. Rights Management >show GRANTS for name; View name User Rights >

Through the previous experience with MySQL, the MySQL configuration problem is excluded, to see if the MSYQL is working properly, by viewing the MySQL data directory in the *.err file (change the extension to. txt) to view Notepad. If too big do not

Source: Persister Links: http://www.blogjava.net/persister/archive/2008/10/27/236813.html With the help of explain, you know when to add an index to the table to use the index to find records and make the select run faster. If some problems

Open My.ini under Windows, add:interactive_timeout=28800000wait_timeout=28800000Expert answer: MySQL is a small relational database management system, because of MySQL small size, speed, low total cost of ownership, especially the characteristics of

Objective:In front of the introduction of PHP script to obtain and print output HTML submitted data, this article will introduce the PHP script access query MySQL database.Example code:15PHP6 Header("Content-type:text/html;charset=utf8"); 7 8

Garbled problem caused by MySQL character setMySQL Character set support (Character set supports) has two aspects:1. Character set (Character set)2, sorting Method (Collation).Support for character sets is refined to four levels:1. Servers (server)2.

From:http://dba.stackexchange.com/questions/1558/how-long-is-too-long-for-mysql-connections-to-sleep 20down Votefavorite11 I logged onto my server to check the status of the database and noticed on the that SHOW PROCESSLIST; there

This time in the study of the locomotive storage tutorial, in the "Configure login information and database (MySQL)" Connection, "Server connection Error" "Host ' XXX ' is not allowed to connect to this MySQL server" error. Errors like this are

Source code address: http://code.taobao.org/p/orzdba/src/trunk/[Email protected] servers]# chmod +x orzdbaConfigure your MySQL authentication information in about 160 lines of code: username, password, socket, host, port[Email protected] servers]#

Summary of MySQL database optimization technology configuration skills, mysql database This article describes how to configure the MySQL database optimization technology. We will share this with you for your reference. The details are as follows: (1)