Hi All,
here are some refs about :
- the "pessimistic" RAM figures: https://moodle.org/mod/forum/discuss.php?d=313394#p1255026
- a nice example of a good web server configuration: https://moodle.org/mod/forum/discuss.php?d=313394#p1258029 => https://moopi.mrverrall.co.uk/course/view.php?id=4.
HTH,
Matteo