PHP underlying system performance tuning guide

PHP Underlying System Performance Tuning Guide

Overview:
With the development of web applications, PHP has become one of the most popular server-side scripting languages. one. However, PHP can face performance bottlenecks when handling large, high-traffic applications. This article will provide you with some tuning tips and specific code examples to help you optimize the performance of PHP's underlying system.

1. Use the optimized PHP version:

• Upgrade to the latest version of PHP. Each version of PHP provides better performance and security. Using the latest version of PHP can bring big performance improvements.
• Choose the PHP version that best suits your application. For example, if your application relies primarily on multi-threading, try using the ZTS (Zend Thread Safety) version of PHP.

2. Optimize PHP configuration:

• Increase the memory limit. By default, PHP has a low memory limit, which can be increased based on the needs of your application. In the php.ini file, set the memory_limit parameter to a larger value, such as "256M" or "512M".
• Adjust PHP execution time limit. Depending on the needs of your application, you can adjust PHP's execution time limit appropriately. In the php.ini file, set the max_execution_time parameter to a larger value, such as "300" (meaning 300 seconds).
• Enable OPcache. OPcache is an extension for PHP 5.5 and above that caches compiled PHP scripts, thereby improving performance. In the php.ini file, set the opcache.enable parameter to "1" and adjust other related parameters appropriately.
• Enable recycling of free memory. In the php.ini file, set the opcache.max_accelerated_files parameter to an appropriate value, such as "10000". This will enable OPcache to reclaim free memory when the number of files limit is reached.

3. Optimize database access:

• Use indexes. Using appropriate indexes on database tables can greatly improve query performance. Using MySQL's EXPLAIN statement can help you analyze the execution plan of the query statement.
• Use batch operations. If you need to perform multiple data operations (such as inserts, updates, or deletes), try to use batch operations instead of single operations. This can reduce the number of database connections and improve efficiency.
• Use database connection pool. Establishing and disconnecting database connections is a relatively expensive operation. Using a database connection pool can avoid the overhead of frequently creating and disconnecting connections.

4. Optimize PHP code:

• Reduce the number of database queries. Try to combine multiple queries into one, or use caching to reduce the number of database queries.
• Use cache. Using cache can greatly reduce the number of accesses to databases and other resources and improve access performance. You can use memory caches such as Memcached and Redis.
• Reduce file operations. File operations (such as reading, writing, uploading) are usually time-consuming. To minimize the number of file operations, you can use file caching to improve performance.
• Optimize loop. Avoid performing time-consuming operations in loops. Try to move time-consuming operations outside the loop or use more efficient algorithms.
• Use asynchronous operations. For some time-consuming operations, asynchronous operations can be used to improve performance. The Swoole extension for PHP provides support for asynchronous programming.

Summary:
Through reasonable PHP configuration, database access optimization and optimized PHP code, you can significantly improve the performance of the underlying PHP system. In actual development, you can also combine monitoring and performance analysis tools to further optimize system performance. Remember, optimization is an ongoing process, and constant adjustments and improvements are required to keep your application high-performing.

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