Here's a hack at it: [the current .rss seems to be too low?]

       stats = File.read "/proc/#{Process.pid}/status"
       stats =~ /RSS:\s+(\d+)/i # attempt to parse it
       return $1

Date: 2009-03-07 00:37
Sender: Roger Pack

I would probably name it vmrss or something--and maybe even 
add the other things that are in that file.
-=r

Date: 2009-03-02 03:51
Sender: Daniel Berger

Well, that's a bit of a dilemma. Which do I include? Do I create
a separate field name? And for what other fields should I do
that?

I'll have to think about it.

Dan

Date: 2009-02-23 16:18
Sender: Roger Pack

appears to be the units [?]
http://bruynooghe.blogspot.com/2009/01/resident-set-size-
rss-from-procpidstat.html

Date: 2009-02-22 14:31
Sender: Daniel Berger

You'll have to tell me what the difference is between that value
in /proc/<pid>/status and /proc/<pid>/stat.

Dan