show global variables

Executes a SQL, but the SQL statement is too large or contains a BLOB or LONGBLOB field in the statement. For example, the processing of image data. can easily cause MySQL server has gone away. Today encountered a similar scenario, MySQL is just

In order to ensure data security, the data needs to be backed up regularly. There are a number of ways to backup, and the effect is different. Once there is an error in the data in the database, you need to use the backed-up data for restore

Copy Code code as follows: #!/bin/ksh Interval=5 prefix= $INTERVAL-sec-status Touch/tmp/running Runfile=/tmp/running MY-E ' Show global variables ' >> mysql-variables While Test-e $RUNFILE; Todo file=$ (Date +%f_%i) sleep=$ (

We all know that Com_insert and other com_xxx parameters can be used to monitor the number of database instances, which we often say QPS. And based on the principle of MySQL replication, all the main library operations will be replayed from the

The projects and documents were put on the GitHub Https://github.com/poiu1235/weibo-catch: Interested can follow, or a little bit of praise The depth-digging approach I'm using here is not to set the crawl boundaries (this is to be considered later)

When you use MySQL (show tables), you sometimes need to see information about tables and fields (whether the table and a field exist, etc.) ~ ~ and PHP provides such related functions as: Mysql_list_dbs (), Mysql_list_fields (), But the

Show can describe information about the database system in various forms, such as data tables, fields, server status, and so on. There are roughly the following methods: Show [All] COLUMNS from tbl_name [to db_name] [like ' pattern '] Show CREATE

mysql| Reference | Reference manual | Chinese MySQL 4.1.0 chinese reference manual---dog (heart sail) Translate MySQL Reference Manual for version 4.1.0-alpha. 6 MySQL Language Reference MySQL has a complex, but intuitive, and easy to learn SQL

In order to troubleshoot the problem, the monitoring of the database is essential, in this introduction of MySQL in the common monitoring indicators.Brief introductionMySQL has a number of branch versions, common with MySQL, Percona, MariaDB, each

MAMP when I clicked Start Server,Found MySQL server not openHttp://images.cnblogs.com/cnblogs_com/lwwen/1231721/o_111111111.pngJust like the photos in the link.Google search on the MAMP below is the ib_logfile* #的文件都删除 is/application/mamp/db/mysql56/

MySQL database Advanced (eight)--event One, Introduction to Events 1, Introduction to EventsAn event is a set of SQL sets that are used to perform timed tasks that are triggered when time is up.An event can be invoked once or periodically, and

What is a tableA table is a structured file that can be used to store data of a particular type. A record in the table has a corresponding caption, which is called a table field.　　Two Create a table 12345 CREATE TABLE 表名(字段名1类型[(

RHEL7 installation mariadbYum install–y mariadb Mariadb-serverMysql_installDB//Initialize database? You can set a password for the root account.? You can delete an account that root can access from outside the local host.? You can delete anonymous

Today, when studying MySQL, want to import text file data into the database, but found that the error, the path of the imported text is still the same mistake, error 1290 (HY000): The MySQL server is running with the-- Secure-file-priv option So it

Log is very important to a system or application, troubleshooting or resolving faults, the first time is to look at the error logMySQL Log classification: Log files record the various types of activities affecting the database, MySQL database common

the basics of MySQL1. Use of help in MySQL serverFormat:     mysql> help commandeg:    mysql> help  create database    Name:  ' Create database '      description:    syntax:        create { database | schema} [if not exists] db_name         [create_

1. Lock mechanism1) When dealing with concurrent reads and writes, a set of locking systems is usually used to solve the problem. The lock system consists of a read lock (also known as a shared lock) and a write lock (also known as an exclusive lock)

VariableIn the MySQL database, there are two types of variables: System variables and custom variables.According to the scope of the variable, but also divided into: Session-level variables: Valid only for the current client as a secondary

1. MyISAM: The default table type, which is based on the traditional ISAM type, ISAM is an abbreviation for indexed sequential access method (indexed sequential access methods), which is the standard way to store records and files. It is not

/*** Note that MySQL default is a native connection, if you want to change to LAN access, to modify the settings. Error is (Communications link failure)* 1, on the server command line input $:vim/etc/mysql/mysql.conf.d/mysqld.cnf* 2, find