Home Database Mysql Tutorial 怎么增大MYSQL数据库连接数_MySQL

怎么增大MYSQL数据库连接数_MySQL

Jun 01, 2016 pm 01:56 PM
Database installation Database Connectivity yes

怎么增大MySQL数据库连接数,MYSQL数据库安装完成后,默认连接数是100,流量稍微大一点的论坛或网站这个连接数是不够哟用的,那么怎么才能增加默认MYSQL连接数呢?这里给大家介绍一下具体的方法与操作步骤!

方法一:进入MySQL安装目录 打开MYSQL配置文件 my.ini 或 my.cnf查找 max_connections=100  修改为 max_connections=1000 服务里重起MYSQL即可

方法二:MySQL的最大连接数默认是100客户端登录:mysql -uusername -ppassword

设置新的最大连接数为200:MySQL> set GLOBAL max_connections=200

显示当前运行的Query:MySQL> show processlist

显示当前状态:MySQL> show status

退出客户端:MySQL> exit

查看当前最大连接数:MySQLadmin -uusername -ppassword variables

方法三:以centos 4.4 下面的MySQL 5.0.33 手工编译版本为例说明:

vi /usr/local/MySQL/bin/mysqld_safe

找到safe_MySQLd编辑它,找到mysqld启动的那两行,在后面加上参数 :

-O max_connections=1500

具体一点就是下面的位置:

用红字特别说明:

then $NOHUP_NICENESS $ledir/$MySQLD

$defaults --basedir=$MY_BASEDIR_VERSION

--datadir=$DATADIR $USER_OPTION

--pid-file=$pid_file

--skip-external-locking

-O max_connections=1500

>> $err_log 2>&1 else

eval "$NOHUP_NICENESS $ledir/$MySQLD

$defaults --basedir=$MY_BASEDIR_VERSION

--datadir=$DATADIR $USER_OPTION

--pid-file=$pid_file

--skip-external-locking $args

-O max_connections=1500 >>

$err_log 2>&1"

保存。

# service MySQLd restart

# /usr/local/MySQL/bin/mysqladmin -uroot -p variables

输入root数据库账号的密码后可看到

max_connections 1500 即新改动已经生效。

还有一种方法,

修改原代码:

解开MySQL的原代码,进入里面的sql目录修改mysqld.cc找到下面一行:

{"max_connections", OPT_MAX_CONNECTIONS,

"The number of simultaneous clients allowed.", (gptr*) &max_connections,

(gptr*) &max_connections, 0, GET_ULONG, REQUIRED_ARG, 100, 1, 16384, 0, 1,

0},

把它改为:

{"max_connections", OPT_MAX_CONNECTIONS,

"The number of simultaneous clients allowed.", (gptr*) &max_connections,

(gptr*) &max_connections, 0, GET_ULONG, REQUIRED_ARG, 1500, 1, 16384, 0, 1,

0},

存盘退出,然后./configure ;make;make install可以获得同样的效果。

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

How to implement database connection and transaction processing in FastAPI How to implement database connection and transaction processing in FastAPI Jul 30, 2023 am 11:45 AM

How to implement database connection and transaction processing in FastAPI Introduction: With the rapid development of web applications, database connection and transaction processing have become a very important topic. FastAPI is a high-performance Python web framework loved by developers for its speed and ease of use. In this article, we will introduce how to implement database connections and transactions in FastAPI to help you build reliable and efficient web applications. Part 1: Database connection in FastA

How to use PHP database connection to implement paging query How to use PHP database connection to implement paging query Sep 08, 2023 pm 02:28 PM

How to use PHP database connection to implement paging query. When developing web applications, it often involves the need to query the database and perform paging display. As a commonly used server-side scripting language, PHP has powerful database connection functions and can easily implement paging queries. This article will introduce in detail how to use PHP database connection to implement paging query, and attach corresponding code examples. Prepare the database Before we start, we need to prepare a database containing the data to be queried. Here we take the MySQL database as an example,

Common database connection and data reading and writing problems in C# Common database connection and data reading and writing problems in C# Oct 10, 2023 pm 07:24 PM

Common database connection and data reading and writing problems in C# require specific code examples. In C# development, database connection and data reading and writing are frequently encountered problems. Correct handling of these problems is the key to ensuring code quality and performance. This article will introduce some common database connection and data reading and writing problems, and provide specific code examples to help readers better understand and solve these problems. Database connection issues 1.1 Connection string errors When connecting to the database, a common error is that the connection string is incorrect. The connection string contains the connection to the database

Advanced PHP database connections: transactions, locks, and concurrency control Advanced PHP database connections: transactions, locks, and concurrency control Jun 01, 2024 am 11:43 AM

Advanced PHP database connections involve transactions, locks, and concurrency control to ensure data integrity and avoid errors. A transaction is an atomic unit of a set of operations, managed through the beginTransaction(), commit(), and rollback() methods. Locks prevent simultaneous access to data via PDO::LOCK_SHARED and PDO::LOCK_EXCLUSIVE. Concurrency control coordinates access to multiple transactions through MySQL isolation levels (read uncommitted, read committed, repeatable read, serialized). In practical applications, transactions, locks and concurrency control are used for product inventory management on shopping websites to ensure data integrity and avoid inventory problems.

How to connect to and operate databases and handle SQL queries How to connect to and operate databases and handle SQL queries Aug 02, 2023 am 09:06 AM

How to connect and operate the database and process SQL queries. In the process of developing applications, database connection and operation are a very important part. Database is an important tool for storing and managing data, and SQL (StructuredQueryLanguage) is a standard language for querying and operating databases. In this article, we will learn how to connect to and operate a database and show some code examples for handling SQL queries. Connect to the database: First, we need to connect to the database to proceed

How to configure database connection in mybatis How to configure database connection in mybatis Jan 15, 2024 pm 02:12 PM

How to configure database connection in mybatis: 1. Specify the data source; 2. Configure the transaction manager; 3. Configure the type processor and mapper; 4. Use environment elements; 5. Configure aliases. Detailed introduction: 1. Specify the data source. In the "mybatis-config.xml" file, you need to configure the data source. The data source is an interface, which provides a database connection; 2. Configure the transaction manager to ensure the normality of database transactions. For processing, you also need to configure the transaction manager; 3. Configure the type processor and mapper, etc.

Why does my PHP database connection fail? Why does my PHP database connection fail? Jun 05, 2024 pm 07:55 PM

Reasons for a PHP database connection failure include: the database server is not running, incorrect hostname or port, incorrect database credentials, or lack of appropriate permissions. Solutions include: starting the server, checking the hostname and port, verifying credentials, modifying permissions, and adjusting firewall settings.

How to connect to a Microsoft Access database using PDO How to connect to a Microsoft Access database using PDO Jul 29, 2023 pm 10:17 PM

How to use PDO to connect to the Microsoft Access database Microsoft Access is a commonly used relational database management system that provides a user-friendly graphical interface and powerful data management functions. For many developers, using PHP to connect to a Microsoft Access database is a challenge. However, by using PHP's PDO (PHPDataObject) extension, connecting to an Access database becomes quite

See all articles