MySQL

Mysql master-slave Replication Monitoring script,Monitor IO and SQL threads. If the problem. Send a mail alert.#!/bin/bash#write by Lijun#Date 2014-08-12#Description Monitor the master pass the data to the slave#=====================mail= "Email

First, the principle of master-slave replication The process of implementing the entire replication between master and slave is done by 3 threads, of which two threads (SQL thread and IO thread) are on the slave side, and another thread (IO) on the

My method is implemented through expect.Installing expectYum Install-y expectOperation:[email protected] ~]# cat test.sh/USR/LOCAL/MYSQL/BIN/MYSQL-E "select version ();"[email protected] ~]# ll test.sh-rwxr-xr-x 1 root root 08-13 16:44 test.sh[Email

This section describes the installation process for MySQL, where we install it in binary format. I'm using a mariadb-5.5.36-linux-x86_64.tar.gz to install it.1. Prepare the file system for data storageThe size of the general database always gets

SimpleDateFormat SDF = new SimpleDateFormat ("Yyyymmddhhmmss");try {String name = Sdf.format (new Date ());String FilePath = System.getproperty ("User.dir") + "//" + name + ". SQL";System ActuatorsRuntime RT = Runtime.getruntime ();Export Database

Everyone in the study of MySQL, after installation will find that the inside has brought a few default database, I installed the MySQL5.5 inside with six databases　　Some information on the internet on the functions of these databases to do some

1. First describe the problem you are having.If you want to remove a tick that allows for a null value ... It happens that the data in the database Processed_f is empty without a value .... The data truncated for column Processed_f will appear when

Profile:The database object index is very similar to the book's directory, mainly to improve the speed of retrieving data from the table.Because the data is stored in a database table, the index is created on a database table object, consisting of a

Two problems with MySQL Q&a parsing binlogBlog Category: Mysql Mysqlbinlog Character Set parsing binlog formatTwo students in a row asked a similar question, must be recorded.Problem: an analytic binlog application of the students found

1. Upload mysql-5.5.21.tar.gz and cmake-2.8.3.tar.gz to the/usr/local folder. 2.CentOS mounting g++ and Ncurses-devel[Email protected] local]# yum-y install gcc-c++[Email protected] local]# yum-y install Ncurses-develInstallation of 3.cmake[[Email

connect_error);} Due to the system default commit in the transaction commit, it is set to false first not commit $mysqli->autocommit (false);//Actually here the system is quite here to make a savepoint, record all the state at this time, rollback is

Mysql performance monitoring tool Innotop introduction and configuration, mysqlinnotop 1. innotop InstallationReference Official Website: http://innotop.googlecode.com/svn/html/installing.html # wget http://innotop.googlecode.com/files/innotop-1.9.0.

Inaccurate MySQL execution plan-Overview The execution plan for the Mao MySQL optimizer is often inaccurate, but not optimal (cpu + io )??? Too many factors :: The information of information_schema is regularly refreshed. In many cases, it is not

MySql basic syntax and exercises (4) 1. Create an employee table (and specify the character set as UTF8)Drop table if exists employee;Create table employee (Id int,Name varchar (20 ),Gender varchar (6 ),Birthday date,Entry_date date,Job varchar (30 )

Performance Optimization-mysql database I. mysql Common commands 1. Open the log 1) show global variables like "% genera % "; 2) set global general_log = on; 3) set global general_log = off; 2. If set autocommit = 0 is enabled for mysql, all

Create a MySQL database using Python to dynamically add fields and insert data Application scenarios: We need to design a database to save the keywords of each document in multiple documents. Assume that each document contains more than 1000

Sorting rules of MySql (2) I saw this SQL statement today. I have heard of it before, but I have not understood it. So I would like to take a note here: UserName varchar (20) collate chinese_prc_ci_as null 1. First, collate is a clause that can be

The new version of MySql5.6.20 cannot be logged on after installation 1. follow the prompts to install mysql2. run cmd to enter the mysql installation directory. Enter cd C in my installation directory C: \ Program Files \ MySQL Server 5.6 \ bin: \

Why can't the mysqlsum () function get the correct result !!!! The problem is: a recharge table state = 1 indicates that the recharge is successful, and a consumption table state = 1 indicates that the consumption is successful. I want to list the

Basic MySQL knowledge and exercises (5) 1. Calculate the average mathematical score of a class.(1). select sum (math)/count (math) as mathematical average scoreFrom student;(2). select avg (math) as mathematical average scoreFrom student;(3). select