Swoole and Workerman's optimization methods for long connections and persistent connections in PHP and MySQL

Swoole and Workerman's optimization method for long connections and persistent connections between PHP and MySQL requires specific code examples

With the development of web applications and the scale of users With the increase, database query has become one of the focuses of application performance optimization. In PHP development, commonly used database connection methods include long connections and short connections. A long connection refers to maintaining the connection state after establishing a database connection and reusing the same connection multiple times; while a short connection means closing the connection after each query is completed.

In PHP, the traditional MySQL connection method is a short connection, that is, the connection is closed after each SQL statement is executed. However, frequent connection operations consume a lot of time and server resources. In order to improve performance, the concepts of long connections and persistent connections have emerged.

Swoole and Workerman are popular high-performance network communication frameworks in the PHP field. While processing TCP/UDP requests, they also provide support for MySQL long connections and persistent connections. The following will introduce in detail the optimization methods of Swoole and Workerman on the connection between PHP and MySQL.

1. Swoole's optimization of MySQL long connections

Swoole provides MySQL's long connection encapsulation class swoole_mysql. When using swoole_mysql, you can enable long connections by setting the connect parameter to true:

$server = new SwooleServer('0.0.0.0', 9501);
$server->on('workerStart', function ($server, $workerId) {
    $server->mysql = new SwooleCoroutineMySQL;
    $server->mysql->connect([
        'host' => 'localhost',
        'port' => 3306,
        'user' => 'root',
        'password' => 'password',
        'database' => 'test',
        'charset' => 'utf8mb4',
        'timeout' => 2,
    ], true);
});

In the above code, set the second parameter in the connection parameter to true, which means enabling long connections. Of course, in order to save server resources, we can also set the connection timeout.

2. Swoole’s optimization of MySQL persistent connections

In addition to long connections, Swoole also supports MySQL’s persistent connections. A persistent connection does not disconnect the connection to the MySQL server after a request ends, but retains the connection in the connection pool for the next request. This method does not require frequent connection and disconnection operations, which can reduce the load on the server.

Using Swoole's persistent connection can be configured as in the following code example:

$server = new SwooleServer('0.0.0.0', 9501);
$server->on('workerStart', function ($server, $workerId) {
    $server->mysql = new SwooleCoroutineMySQL;
    $server->mysql->connect([
        'host' => 'localhost',
        'port' => 3306,
        'user' => 'root',
        'password' => 'password',
        'database' => 'test',
        'charset' => 'utf8mb4',
        'timeout' => 2,
        'persistent' => true,
    ]);
});

In the above code, set the persistent connection in the connection parameter to true, indicating that the persistent connection is enabled.

3. Workerman’s optimization of MySQL long and persistent connections

Similar to Swoole, Workerman also provides support for MySQL long and persistent connections. The following is a sample code for using Workerman to optimize MySQL long connections and persistent connections:

$worker = new Worker();
$worker->onWorkerStart = function ($worker) {
    $worker->mysql = new WorkermanMySQLConnection([
        'host' => 'localhost',
        'port' => 3306,
        'user' => 'root',
        'password' => 'password',
        'database' => 'test',
        'charset' => 'utf8mb4',
    ], $worker->id);
};

In the above code, create a Workerman instance, and in the onWorkerStart callback function, create a MySQL connection object and set the connection parameters. In this way, each Worker process has its own MySQL connection, which can optimize long connections and persistent connections.

Summary:

By using Swoole and Workerman to optimize the connection between PHP and MySQL, that is, turning on long connections or persistent connections, you can reduce the establishment and disconnection of connections and improve the efficiency of database queries. efficiency, reducing server load.

However, long connections and persistent connections are not suitable for all application scenarios, especially in high concurrency situations, and need to be used with caution. The appropriate connection method needs to be selected based on specific business needs and server resources.

Readers are reminded that when using long connections and persistent connections, they should avoid occupying database connection resources for a long time and release the connection in time to ensure the normal operation of the database.

(Note: The above code is only an example, and needs to be adjusted according to specific projects when used in practice.)

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