How much was the maximim RAM ever you got in VPS?
For me, got 1 GB in OpenVZ and that was around 2 years ago. Provider is in dead pool now btw! But I didn't use more than 600 MB as I can recall, even though I had many useless process running and also Apache not optimized.
Second was 1 GB also for short period from HostRail (Fail), I discontinued before their "destruction"!
It's worth mentioning that 1 GB of RAM let me rest in relax much much more than anything below 512, using Apache. It simply has enough room for sizable amount of connections/anything.
And what about others?
☻☻ VPS ☺ as of now:- 384-256-128-512x2 ☺☺