How to install XCache

XCache is one of the most respected php cachers around, so here’s a little how to guide that I wrote up as a reference for myself a while back. Hope you find it useful…

  • Ssh telnet into your server as root user
  • Grab XCache by typing:
cd /usr/local/src

Wait for package to download

  • find phpize and php-config paths, type:
whereis phpize
whereis php-config

outputs looks like:

phpize: /usr/bin/phpize /usr/local/bin/phpize and
php-config: /usr/bin/php-config /usr/local/bin/php-config

Next we’ll extract files, change directories and install, by referencing the file paths we were given above:

gunzip -c xcache-1.2.2.tar.gz | tar xf -
cd xcache-1.2.2
./configure --enable-xcache
make install

Take note of where it copies file i.e.


Now locate php.ini, type:

whereis php.ini

output looks like:

php: /usr/bin/php /usr/lib/php /usr/lib/php.ini /usr/local/lib/php.ini /usr/include/php /usr/man/man1/php.1

Edit php.ini using pico, vi or nano text editors (in linux) and scroll to the section like:

;Windows Extensions
;Note that MySQL and ODBC support is now built in, so no dll is needed for it.

Above that add the following, but edit accordingly (see proceeding notes)

zend_extension = /usr/lib/php/extensions/no-debug-non-zts-20020616/

; required for >=php5.1 if you turn XCache on
auto_globals_jit = Off

xcache.admin.user = "admin"
; paste the output of md5("password") below
xcache.admin.pass = ""

xcache.shm_scheme   = "mmap"
xcache.size     = 32M
xcache.count      = 1
xcache.slots      = 8K
xcache.ttl      = 7200
xcache.gc_interval    = 300

xcache.var_size     = 32M
xcache.var_count    = 1
xcache.var_slots    = 8K
xcache.var_ttl      = 7200
xcache.var_maxttl   = 14400
xcache.var_gc_interval    = 300

xcache.test     = Off
xcache.readonly_protection  = Off
xcache.mmap_path    = "/dev/zero"
xcache.coredump_directory = ""

xcache.cacher     = On
xcache.stat     = On
xcache.optimizer    = On

xcache.coverager    = Off
xcache.coveragedump_directory = ""

Note: xcache.count refers to the number of processors
Note: You may want to set ‘xcache.size’ and ‘xcache.var_size’ to 64 if you have over 1GB of ram.

Save php.ini file and restart Apache for XCache to load:

  • /etc/rc.d/init.d/httpd stop
  • /etc/rc.d/init.d/httpd start

Finally, check phpinfo.php for XCache section

Disclaimer & Credits

As usual, this guide is provided with no warranties or guarantees – use at your own risk.
Thanks to George (eva2000 at vbulletin) for the basic template and Teck for the settings.