Hi, I forgot to mention in my last posts that my Xymon server is a Raspberry Pi (512Mb, 950MHz clock) running Debian Squeeze and using a 32GB SD card for the main disk.
The server is currently monitoring a Sun T2000 Solaris 10 box and an Apple Mac Mini as well as itself. (It is using minimal CPU.)
I compiled the latest Xymon on the Pi. I used Mac Ports to make an Xymon client for the Mac Mini (OSX Mountain Lion) - you have to fiddle with the df command to get the right disk data, apparently it uses the new Unix standard byt Xymon doesn't.
xymon at cream:~$ uname -a Linux cream 3.2.27+ #250 PREEMPT Thu Oct 18 19:03:02 BST 2012 armv6l GNU/Linux
Xymon Version 4.3.10: 3 Aug 2012
World viewable at: http://ssh.pettefar.de:1984/xymon/
Regards,
Nick Pettefar Dublin