How to check (or log) memory_usage by a worker process before it restarts?

[knd]

I currently have this setting.

 66     # restart if memory gets too high
 67     w.transition(:up, :restart) do |on|
 68       on.condition(:memory_usage) do |c|
 69         c.above = 200.megabytes
 70         c.times = 2
 71       end
 72     end

I'm having issues finding the reasonable limit. I'd to get more information (e.g. current memory usage, timestamps) right before the process restarts or when this condition is met.

The /var/log/god.log doesn't show much info except

I [2015-07-20 10:39:19]  INFO: Loading /opt/god/god.conf
I [2015-07-20 10:39:19]  INFO: Syslog enabled.
I [2015-07-20 10:39:19]  INFO: Using pid file directory: /var/run/god
I [2015-07-20 10:47:48]  INFO: Loading /opt/god/god.conf
I [2015-07-20 10:47:48]  INFO: Syslog enabled.
I [2015-07-20 10:47:48]  INFO: Using pid file directory: /var/run/god
I [2015-07-22 09:38:26]  INFO: Loading /opt/god/god.conf
I [2015-07-22 09:38:26]  INFO: Syslog enabled.
...

Please help.