Alternative PHP Cache can dramatically improve the speed of you PHP applications.

On SLES you need php53-devel and php53-pecl installed.

zypper install php53-devel
zypper install php53-pear

Install APC using pecl.  pecl install apc

Edit php.ini add a line to load the apc extension.

vi /etc/php5/apache2/php.ini
extension=apc.so

Restart apache.

apache2ctl restart

To check it’s working copy the apc.php admin page to the webroot

cp /usr/share/php5/PEAR/apc.php /srv/www/htdocs/

Now visit http://yourserver/apc.php to see how the cache is working.