Instalar xcache en CentOS 5

Use wget command to download latest stable release:
# 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"

It means it is not installed or location is different. Run following to find exact location:

find / -iname "xcache.so"

If you do not see file try to reinstall it again and pay attention to screen, it does put files in one of those lib dir.