Swoole and Workerman's optimization methods for connection pooling and connection reuse in PHP and MySQL

Swoole and Workerman are two very well-known high-performance network communication frameworks in the PHP field. They all provide optimization methods for connection pooling and connection reuse, which can establish efficient connections between PHP and MySQL.

In traditional PHP applications, the connection needs to be re-established every time the database is accessed, and under high load conditions, frequent connections and disconnections will bring great performance overhead. By using connection pooling and connection reuse, frequent connection operations can be avoided, database access efficiency can be improved, and the performance of the entire application can be improved.

First, let’s take a look at the connection pooling and connection reuse methods provided by Swoole and Workerman.

Connection pool in Swoole
Swoole provides a connection pool component that can manage and reuse long database connections. By using a connection pool, established database connections can be reused, avoiding frequent connection and disconnection operations.

The following is a simple example of using the Swoole connection pool:

<?php

$pool = new SwooleCoroutineChannel(10); // 创建一个容量为10的连接池

// 初始化连接池
for ($i = 0; $i < 10; $i++) {
    $db = new SwooleCoroutineMySQL();
    $db->connect([
        'host' => '127.0.0.1',
        'user' => 'root',
        'password' => 'password',
        'database' => 'test',
    ]);
    $pool->push($db); // 将连接放入连接池
}

// 从连接池中获取连接，并执行数据库查询操作
go(function () use ($pool) {
    $db = $pool->pop(); // 从连接池中取出一个连接
    $result = $db->query('SELECT * FROM table'); // 执行查询操作
    $pool->push($db); // 将连接放回连接池
    // 处理查询结果
});

In the above example, we created a connection pool with a capacity of 10 and initialized 10 database connections. Use the $pool->pop() method to remove a connection from the connection pool. After performing the database operation, use the $pool->push($db) method. Put the connection back into the connection pool.

Connection reuse in Workerman
Workerman also provides a method for connection reuse. By using WorkerMan's database connection management class DbConnection, database connections can be reused.

The following is an example of using Workerman connection reuse:

<?php

use WorkermanWorker;
use WorkermanMySQLConnection as DbConnection;

$worker = new Worker();

$worker->onWorkerStart = function () {
    $db = new DbConnection('host=127.0.0.1;port=3306;dbname=test;charset=utf8', 'root', 'password');
    $worker->db = $db;
};

$worker->onConnect = function ($connection) {
    $connection->db = $worker->db; // 将数据库连接赋值给连接对象
};

$worker->onMessage = function ($connection, $data) {
    $result = $connection->db->select('SELECT * FROM table'); // 执行查询操作
    // 处理查询结果
};

In the above example, we created a database connection in the onWorkerStart callback function and assigned a value The Worker object is given, and then the connection is assigned to the connection object in the onConnect callback function of each connection, and finally the query operation is performed through the connection object in the onMessage callback function.

Through the above examples, we can see that both Swoole and Workerman provide convenient methods for connection pooling and connection reuse between PHP and MySQL. By using these methods, we can avoid frequent connection and disconnection operations, improve database access performance, and thereby optimize the communication efficiency between PHP and MySQL. At the same time, these frameworks also provide good concurrency support and can handle a large number of concurrent requests, making them suitable for high-performance network application development.

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