Starting php-fpm PHP Warning:  Module 'apc' already loaded in Unknown on line 0
<br />
<b>Warning</b>:  Module 'apc' already loaded in <b>Unknown</b> on line <b>0</b><br />
PHP Warning:  Module 'memcache' already loaded in Unknown on line 0
<br />
<b>Warning</b>:  Module 'memcache' already loaded in <b>Unknown</b> on line <b>0</b><br />
 done

# grep -lr memcache /path/to/the/extension_dir

# grep -lr memcache /etc/php.d/
/etc/php.d/memcache.ini