Custom facter fact for raw memorysize.

memorysize_raw.rb

# for some reason facter takes the raw memorysize and reports it as
# a formatted string, which is useless for calculation
#

Facter.add("memorysize_raw") do
    confine :kernel => :linux
    setcode do
        size = 0
        File.readlines("/proc/meminfo").each do |l|
            size = $1.to_f if l =~ /^MemTotal:\s+(\d+)/
        end
    size
    end
end

Found this through Google, but you shouldn't rely on MemTotal from meminfo. That value can actually change as kernel modules leak memory. It's not grabbed from anything physical, it's a sum of all the other memory columns. Just wanted to let you (and others) about this as we just got bit by it.