Getting memory usage of my process from OSX using Ruby

Question

I have a Ruby app which (on Linux) uses the /proc filesystem to get information on its memory usage. Does anyone know how to get the same information for Mac OSX? The task_info

Answer 1

Taken from http://laurelfan.com/2008/1/15/ruby-memory-usage:

memory_usage = `ps -o rss= -p #{Process.pid}`.to_i # in kilobytes 

Verified to work in both Linux and OS X.

This returns the number of bytes that the process has resident in memory, excluding any that are swapped out

To get the total virtual memory size including swap, change rss to vsz (tested in Linux, but not tested in OSX):

memory_usage = `ps -o vsz= -p #{Process.pid}`.to_i # in kilobytes