how many hits per second can Rails support on dreamhost?

i wonder what is a ballpark number that Rails can support for number of
hits per second, if we are hosting RoR on

1) dreamhost or netfirms
2) as a separate virtual server
3) as a standalone machine

maybe even 1 hit per second can be ok if that means

86400 page view can be served per day... if the expected page view is
how 300 per day. thanks.