I'm on a shared hosting which completely run on Litespeed. I have good loading times TTFB on my Prestashop site, which have opcache running as well. In my Prestashop backend I can enable memcached, which is supported by the server. But I wonder if I will benefit from it or it will conflict with Litespeed and lead that I will get worse site performance? Looking at the memcached stats page, usually only a small cache out of the 32MB is being allocated to memcached: Used Cache Size 405.8 KBytes There are two versions I can choose from: Memcached via PHP::Memcached Memcached via PHP::Memcache (you must install the Memcache PECL extension) Don't know if they will do different things with Litespeed. I'm currently with memcached.