Hello, I have an VPS with 512MB of RAM (yes, I know is little, but really I don't need more for my forum atm). I've installed nginx 1.6, mariadb 10 and php-fpm 5.6 with zend opcache and memcache. When I configure the memcache on my xenforo: PHP: $config['cache']['enabled'] = true;$config['cache']['frontend'] = 'Core';$config['cache']['frontendOptions'] = array('caching' => true,'lifetime' => 3600,'cache_id_prefix' => 'xf_');$config['cache']['backend'] = 'Memcached';$config['cache']['backendOptions'] = array( 'compression' => true, 'servers' => array( array( // your memcached server IP /address 'host' => '127.0.0.1', // memcached port 'port' => 11211, ) )); The performance is a little lower that if I don't configure any cache system. Here a simple apache benchmark Without cache: With memcache: Practically the times are the same with and without cahe, how can be possible? I specified a 128MB for memcache, and I'm alone in this server only loading the home. And now, the funny part: I'm configuring this server in order to replace my old (actually production) server, similar machine, but with very much slower disks, with Apache 2.2, php5.4 running as mod_php and mysql 5.5. And here's the same apache benchmark of my production server (with memcache enabled also): 46.85 rps! 4 times more than my new server with SSD disks, and opcache instead of apc, nginx 1.6 (caching the static content) and php-fpm. I'm benchmarking with this: ab -kc 100 -n 1000 "http://www.mtberos.com/" What's wrong with my new server? Thanks a lot!