PHP and Redis performance monitoring

With the rapid development of Internet technology, the number of website visits is increasing, and the performance requirements for servers are also getting higher and higher. PHP, a scripting language, has become a popular language in Internet development due to its high development efficiency, ease of learning and ease of use. Redis, a high-performance data caching processing software, has also become the first choice for many websites and applications.

As a PHP developer, we need to monitor the performance of PHP and Redis, discover performance problems and solve them in time to ensure that our website can run stably and efficiently. This article will introduce some commonly used PHP and Redis performance monitoring methods and explain their principles.

1. PHP performance monitoring

1. Xdebug

Xdebug is an open source PHP extension that provides code debugging, performance analysis, and code coverage analysis and other functions. Using Xdebug, we can track code execution time, the number and time of function calls, memory usage and other information, helping us identify performance problems and provide solutions.

After installing the Xdebug extension, add the following configuration in php.ini:

[xdebug]
zend_extension = "xdebug.so"
xdebug.remote_enable = 1
xdebug.remote_handler = "dbgp"
xdebug.remote_host = "127.0.0.1"
xdebug.remote_port = 9000

Here is the remote debugging function of Xdebug to observe the time and frequency of code execution. Of course, you can also use more Xdebug features for performance monitoring.

2. OpCache

OpCache is an opcode cache that comes with PHP. It can cache the bytecode of PHP scripts during operation, saving the server from repeatedly compiling scripts. time, thereby improving the performance of PHP. The performance advantages of OpCache are very significant. Using OpCache can reduce PHP's response time by 30% to 50%.

Enabling OpCache is very simple, add the following configuration in php.ini:

[opcache]
zend_extension = "opcache.so"
opcache.enable = 1
opcache.memory_consumption = 256
opcache.max_accelerated_files = 10000
opcache.validate_timestamps = 0

OpCache is one of the necessary tools to optimize PHP performance, and we should not ignore its existence.

3. PHP-FPM

PHP-FPM is the abbreviation of PHP FastCGI Process Manager. It is a FastCGI implementation for PHP that can manage multiple PHP processes and solve It eliminates the problem of the traditional CGI mode that requires reloading the environment for each request, thereby improving the performance of PHP services.

PHP-FPM itself is a performance monitoring tool. Through the status panel of PHP-FPM, you can view the status, occupied memory and resources of each PHP process, etc. Add the following configuration to php-fpm.conf:

[www]
pm.status_path = /status

Add the following configuration to web servers such as Nginx to enable the PHP-FPM status panel:

location /status {
    fastcgi_pass unix:/run/php-fpm/php-fpm.sock;
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    allow 127.0.0.1;
    deny all;
}

2. Redis performance monitoring

1. Redis-cli

Redis-cli is the command line client of Redis and one of the tools for Redis performance monitoring. We can use redis-cli to view Redis performance indicators, such as number of connections, memory usage, response time, etc.

Take checking the memory usage of Redis as an example. Enter the Redis-cli command:

redis-cli info memory

to get the memory usage report of Redis, including the total amount of allocated memory, used memory, and fragmentation , the number of keys, the average memory usage of each key, etc.

2. Redis performance monitoring tools

In addition to Redis-cli, there are many open source Redis performance monitoring tools, such as RedisLive, RedisStat, etc. These tools can provide more intuitive and easy-to-use Redis monitoring information.

RedisLive is a web-based graphical Redis monitoring tool that can view various parameters and performance indicators of Redis in real time. RedisStat is a command line-based Redis monitoring tool that provides a variety of customization options and supports real-time graphical display of performance data.

We can choose appropriate Redis performance monitoring tools according to different needs to better understand the operating status of Redis.

To sum up, the performance monitoring of PHP and Redis is one of the very important links in Internet development. We can perform performance monitoring through the methods mentioned above, find problems in time and solve them to ensure that our website can run efficiently and stably.

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