Survival from desperate situation: When the PHP server encounters a bottleneck, how to fight back and regain a new life?

Optimization PHP ServerConfiguration

php editor Yuzai will discuss with you how to fight back and regain a new life when the PHP server encounters a bottleneck. When faced with problems such as reduced server performance and extended response time, we can improve performance by optimizing code, adjusting server configuration, and using caching technology to rejuvenate the server and achieve a breakthrough in "desperate situations". Through the interpretation and practice of this article, your PHP server will be reborn and run efficiently!

• Adjust PHP memory limit: By modifying the memory_limit parameter in the php.ini file, you can increase the memory available for PHP scripts.

memory_limit = 128M

• Optimize PHP thread configuration: By adjusting the max_children parameter in the php.ini file, you can control the maximum number of PHP-FPM processes, thereby improving the server's concurrency processing capabilities.

max_children = 32

• Enable OPcache: OPcache is a built-in caching mechanism of PHP that can store compiled PHP scripts in memory, thereby increasing the execution speed of the script.

opcache.enable=1
opcache.enable_cli=1

Upgrade PHP server hardware

If the server's hardware configuration can no longer meet the needs of the website, you need to consider upgrading the hardware. Here are some common upgrade hardware:

• Increase memory: Memory is an important resource for server operation. Increasing memory can improve the overall performance of the server.

• Upgrade CPU: The CPU is the brain of the server. Upgrading the CPU can improve the computing power of the server.

• Replace the hard drive: You can use a solid-state drive (SSD) to increase the read and write speed of the hard drive.

Use caching technology

Using caching technology can reduce the number of queries to the database , thereby improving server performance. Here are some common caching techniques:

• Page cache: Page cache can store the entire web page in memory. When the user requests the page, it is read directly from the memory, thereby reducing the number of queries to the database .

//使用apc缓存
apc_add("my_var", "my_value");
echo apc_fetch("my_var");

• Query cache: Query cache can store the results of database queries in memory. When the user queries the same database data again, it is read directly from the memory, thereby reducing the number of queries to the database.

// 使用memcached缓存
$memcache = new Memcache;
$memcache->connect("localhost", 11211);
$memcache->set("my_key", "my_value", 0, 3600);
echo $memcache->get("my_key");

• File caching: File caching can store file contents in memory. When the user requests a file, it is read directly from the memory, thus reducing the number of disk accesses.

// 使用文件缓存
file_put_contents("cache/my_file.txt", "my_value");
echo file_get_contents("cache/my_file.txt");

Optimize database

Optimizing the database can increase the query speed of the database, thereby improving the performance of the server. The following are some common methods for optimizing databases:

• Create index: Creating index can speed up database query.

• Optimizing query statements: Optimizing query statements can reduce database query time.

• Use database connection pool: Database connection pool can reduce the time to establish and close database connections, thereby improving server performance.

// 使用PDO连接池
$dsn = "Mysql:host=localhost;dbname=my_database";
$username = "root";
$passWord = "";

$pool = new PDO($dsn, $username, $password, [
PDO::ATTR_PERSISTENT => true,
]);

$connection = $pool->getConnection();

$statement = $connection->prepare("SELECT * FROM my_table");
$statement->execute();

$results = $statement->fetchAll();

$connection->release();

Optimize PHP code

Optimizing PHP code can increase the execution speed of PHP scripts, thereby improving server performance. Here are some common ways to optimize PHP code:

• Reduce the number of loops: Reducing the number of loops can improve the execution speed of PHP scripts.

• Use arrays instead of strings: Arrays are accessed faster than Strings, so when you need to access data multiple times, you should use arrays instead Not a string.

• Use caching: Caching can reduce the execution time of PHP scripts, thereby improving server performance.

• Use PHP extensions: PHP extensions can increase the execution speed of PHP scripts, so you should use PHP extensions when you need to perform certain complex operations.

// 使用PHP扩展
$imagick = new Imagick("image.jpg");
$imagick->resizeImage(100, 100, imagick::FILTER_LANCZOS, 1);
$imagick->writeImage("image-resized.jpg");

in conclusion

By optimizing the PHP server configuration, upgrading the PHP server hardware, using caching technology, optimizing the database and optimizing the PHP code, we can effectively solve the bottleneck problems encountered by the PHP server, improve the performance of the server, thereby improving the website access speed and user experience.

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