Translations:FAQ/217/en

Memoryː The machine should have a minimum of 512MB, but more would be better. Note that 99% of the time >512MB memory will NOT be used! The extra memory is there only in case of a flood / server attack / network issues, in which case for a short moment memory can peak to the given figure. If you use the recommended memory values then your server can "take the hit" (DoS and DDoS) without much noticeable slowdown and without going down.