Ram Management

[David Kwinter]

A revolution-build server program I have crashes reliably anywhere 
between the 1500-1800th repeat in a script that needs to make >9000 laps 
to complete. I know that the crash comes right as my computer runs out 
of ram. Is there an easy way to monitor the free system ram and quit 
then relaunch the program? I could make the script resume easily enough, 
but what's the best way of measuring when the ram's about the dry up?