Packages php5-fpm and php-apc installed from ubuntu 10.10 official repo. APC configuration:
/etc/php5/conf.d/apc.ini
extension=apc.so
apc.enabled=1
apc.shm_size=128M
Afret php5-fpm restart:
Fatal error: Call to undefined function apc_exists() in /var/www/.../application/models/user_model.php on line 271
phpinfo(); says apc module is loaded.
apc_exists needed apc >= 3.1.4 but ubuntu 10.10 has 3.1.3p1-2
apt-get install php5-fpm
nano /etc/php5/fpm/php.ini
add ==> extension=apc.so in your dynamic extensions section restart and APC should be working fine, double check with your php info file