How do I install Xcache opcode cacher for PHP 5 under RHEL / CentOS version 5.0 server?
XCache is a open-source opcode cacher, which means that it accelerates the performance of PHP on servers. It optimizes performance by removing the compilation time of PHP scripts by caching the compiled state of PHP scripts into the shm (RAM) and uses the compiled version straight from the RAM. This will increase the rate of page generation time by up to 5 times as it also optimizes many other aspects of php scripts and reduce serverload.
Step # 1: Download xcahce source code
Use wget command to download latest stable release:
# cd /opt
# wget http://xcache.lighttpd.net/pub/Releases/1.2.1/xcache-1.2.1.tar.gz
Step # 2: Untar tar ball
Use tar command:
# tar -zxvf xcache-1.2.1.tar.gz
# cd xcache-1.2.1
Step # 2: Compile and install xcahce
Use phpize command to prepare xcache as a PHP extension for compiling:
# phpize
Configure, compile and install xcache:
# ./configure --enable-xcache
# make
# make install
Default xcache.so installation location
- 64 bit PHP module installed at /usr/lib64/php/modules/xcache.so
- 32 bit PHP module installed at /usr/lib/php/modules/xcache.so
Step # 3: Create xcache.ini file
Under RHEL / CentOS, you place php modules configuration at /etc/php.d/ directory:
# cd /etc/php.d/
Create xcache.ini file:
# vi xcache.ini
Append configuration directives:
[xcache-common]
; change me - 64 bit php => /usr/lib64/php/modules/xcache.so
; 32 bit php => /usr/lib/php/modules/xcache.so
zend_extension = /usr/lib64/php/modules/xcache.so
[xcache.admin]
xcache.admin.auth = On
xcache.admin.user = "mOo"
; xcache.admin.pass = md5($your_password)
xcache.admin.pass = ""
[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
Save and close the file.
Alternatively, you can also copy default xcache.ini to /etc/php.d/
# cp xcache.ini /etc/php.d/
# vi /etc/php.d/xcache.ini
Restart your Apache web server:
# service httpd restart
If you are using Lighttpd web server, enter:
# service lighttpd restart
Step # 4: Make sure xcache is working
Type the following command for verification:
$ php -v
Output:
PHP 5.1.6 (cli) (built: Nov 20 2007 11:11:52)
Copyright (c) 1997-2006 The PHP Group
Zend Engine v2.1.0, Copyright (c) 1998-2006 Zend Technologies
with XCache v1.2.1, Copyright (c) 2005-2007, by mOo
You should see line “XCache v1.2.1, Copyright (c) 2005-2007, by mOo“
