XCache is free and open source PHP. By using XCache, you will have better performance in your PHP script execution on a Linux VPS. It can achieve this by eliminating the compilation time of the PHP code, caching the compiled version of the PHP code into memory, and then using the compiled version of the code. It can significantly speed up page generation times up to 5x faster, and it also optimizes and enhances many other aspects of PHP scripts and reduces server load.
In this tutorial, we are going to show you how to install XCache on CentOS 7 VPS.
First of all, login to your CentOS 7 VPS server and make sure all packages on your server are up to date
yum -y update
Then, install the following packages
yum install -y php-devel gcc make
Once the required packages are installed, proceed to download XCache. Go to their official website and select the latest stable version of XCache. At the time of this writing, this is version 3.2.0
cd /opt wget http://xcache.lighttpd.net/pub/Releases/3.2.0/xcache-3.2.0.tar.gz
Unpack the downloaded .tar archive
tar -zxvf xcache-3.2.0.tar.gz
This will create a new directory ‘XCache-3.2.0’. Go to this directory
Run phpize command to prepare XCache as PHP extension
phpize Configuring for: PHP Api Version: 20100412 Zend Module Api No: 20100525 Zend Extension Api No: 220100525
Next, we need to configure, compile and install XCache
./configure --enable-xcache make make install
The location of xcache.so is shown in the last step
Installing shared extensions: /usr/lib64/php/modules/
So the location of the XCache extension is the path:
Now we need to edit the PHP configuration file. In order to find it, you need to. for you to do
php -i |grep php.ini Configuration File (php.ini) Path => /etc Loaded Configuration File => /etc/php.ini
Create a config file for XCache and add the following lines
nano /etc/php.d/xcache.ini [xcache-common] extension = /usr/lib64/php/modules/xcache.so [xcache] xcache.shm_scheme = "mmap" xcache.size = 32M xcache.count = 1 xcache.slots = 8K xcache.ttl = 3600 xcache.gc_interval = 300 ; Same as aboves but for variable cache ; If you don't know for sure that you need this, you probably don't xcache.var_size = 0M xcache.var_count = 1 xcache.var_slots = 8K xcache.var_ttl = 0 xcache.var_maxttl = 0 xcache.var_gc_interval = 300 ; N/A for /dev/zero xcache.readonly_protection = Off xcache.mmap_path = "/dev/zero" xcache.cacher = On xcache.stat = On
Make sure to add the correct path to the XCache extension.
You can change the parameters in the xcache.ini file according to your needs.
Restart the Apache web server for the changes to take effect
systemctl restart httpd.service
At this point, XCache should be successfully installed on your server. You can check this by running the following command
# php -v PHP 5.4.16 (cli) (built: Jun 23 2015 21:17:27) Copyright (c) 1997-2013 The PHP Group Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies with XCache v3.2.0, Copyright (c) 2005-2014, by mOo with XCache Optimizer v3.2.0, Copyright (c) 2005-2014, by mOo with XCache Cacher v3.2.0, Copyright (c) 2005-2014, by mOo with XCache Coverager v3.2.0, Copyright (c) 2005-2014, by mOo
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