PHP ~Performance comparison with various acceleration tools~_PHP tutorial

Introduction to Xcache

The principles and functions of PHP accelerator have been introduced before (see PHP-FPM server of LAMP architecture). As one of the most widely used PHP accelerators, xcache has better performance than the early eAccelerator accelerator, so this time we will compare Let’s take a look at the performance impact of the accelerator xcache on PHP programs when they are executed.

Install xcache

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# Install

tar xf xcache-3.0.3.tar.gz

cd xcache-3.0.3

/usr/local/php/bin/phpize # xcache is installed as an external module of php

./configure --enable-xcache --with-php-config=/usr/local/php/bin/php-config

make && make install

# When the installation is completed, a line similar to the following will appear:

Installing shared extensions: /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/

# Edit php.ini and integrate php and xcache:

# First import the sample configuration provided by xcache into php.ini

mkdir /etc/php.d # This is the configuration file scanning directory configured when installing PHP earlier

cp xcache.ini /etc/php.d # The xcache.ini file is in the source code directory of xcache.

# Next edit /etc/php.d/xcache.ini, find the line starting with extension, and change it to the following line:

extension = /usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/xcache.so

# If there are multiple extension command lines in the php.ini file, make sure this new line is ranked first.

# Check whether xcache has been installed successfully:

/usr/local/php/bin/php -m |grep -i xcache

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Introduction to Opcache

The new generation PHP accelerator was developed by Zend. Its implementation principle is similar to Xcache. It buffers the data after PHP execution into the memory to avoid repeated compilation processes. It can directly use the compiled code in the buffer to improve Speed, reducing server load, but the performance is superior to Xcache, see the test results for details

Install Opcache

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wget http://pecl.php.net/get/zendopcache-7.0.2.tgz

tar xzf zendopcache-7.0.2.tgz

cd zendopcache-7.0.2

/usr/local/php/bin/phpize

./configure --with-php-config=/usr/local/php/bin/php-config

make

make install

# Configuration file settings, you can directly add the following content at the end of php.ini, but here configure the new file opcache.ini under the scanning directory php.d of the PHP configuration file for easy management, php-config-scan- dir is defined when compiling and installing PHP

# vi /etc/php.d/opcache.ini

[opcache]

zend_extension=/usr/local/php/lib/php/extensions/no-debug-non-zts-20100525/opcache.so

opcache.memory_consumption=128 # The allocated memory size in MB, that is, how much precompiled PHP code can be stored

opcache.interned_strings_buffer=8 # The memory size of interned strings, unit MB

opcache.max_accelerated_files=4000 # Maximum number of files allowed to be cached

opcache.revalidate_freq=60 # How often to check file timestamp to change shared memory allocation, unit is s

opcache.fast_shutdown=1 # Whether to enable the fast shutdown function, 1 is enabled

opcache.enable_cli=1 # Allow caching of PHP programs under CLI

#Check that the module is successfully installed: /usr/local/php/bin/php -m |grep -i opcache

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hhvm introduction

HipHop VM (HHVM) is a virtual machine launched by Facebook to execute PHP code. It is a JIT (Just-In-Time) compiler for PHP and has the advantages of generating fast code and just-in-time compilation;

hhvm compiles and converts PHP code into C++ programs for execution, and the execution efficiency is significantly improved;

According to Facebook, HHVM has achieved significant improvements in speed, being 60% faster than the currently used PHP interpreter and using 90% less memory

Install hhvm

Because hhvm is still in the research and development stage, there are very few domestic applications for production environments, and the environment required for installation is relatively complex (for example, the versions of boost-system and boost-filesystem under CentOS6.5 are too low), so I am still in the debugging and testing phase, and will post the test results of hhvm together when the test results are available.

Test steps

# Find another virtual machine to stress test the HTTPD server (192.168.1.110)

# To test the tool, just use the benchmark tool ab that comes with Apache

# The test method is as follows:

ab -c 20 -n 2000 http://192.168.1.110:8080/index.php

# Note: The test uses 20 concurrency to check the acceleration effect of the xcache accelerator without affecting access; the test page can use the login page index.php of phpMyAdmin just deployed in the previous lecture

# Note: In order to better test the caching characteristics of the PHP accelerator, you can test several times in a row to get a stable value

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