gistfile1.txt

Vagrant.configure("2") do |config|
	config.vm.define "dev", primary: true do |dev|
		dev.vm.provider "virtualbox" do |v|
			v.memory = 1024
		end
	end
	config.vm.define "dev2" do |dev2|
		dev2.vm.provider "virtualbox" do |v|
			v.memory = 512
		end
	end
end

$ vagrant ssh dev
Last login: Tue Mar 24 09:18:41 2015 from 10.0.2.2
vagrant@gabriel403-dev:~$ free -m
             total       used       free     shared    buffers     cached
Mem:           993        410        583         21         18        208
-/+ buffers/cache:        183        810
Swap:         1020          0       1020
vagrant@gabriel403-dev:~$ logout
Connection to 127.0.0.1 closed.

$ vagrant ssh dev2
Last login: Tue Mar 24 09:18:41 2015 from 10.0.2.2
vagrant@gabriel403-dev:~$ free -m
             total       used       free     shared    buffers     cached
Mem:           489        396         92         21         18        207
-/+ buffers/cache:        170        318
Swap:         1020          0       1020
vagrant@gabriel403-dev:~$