Estimate Linux process memory usage

memory_estimate.rb

# can probably cross reference with ltrace
# this removes shared libraries from the total memory count
def memory_estimate(pid)
  `sudo pmap #{pid}`.lines.reject{|line| 
    line[%r[/lib[^.]+\.so]] or line[/^ total/]
  }.drop(1).reduce(0){|total,line| 
    total + line.match(/(\d+)K/)[1].to_i 
  }
end