I posted a cleaned up version of my version mySQL server gmetric. This
one is a lot more comprehensive than the ones I have been able to find
since any metric available through mysqladmin extended-status can be
sent to Ganglia. You can specify which ones you are most interested in.
There are 200 or so so choose carefully :-).
Also I have updated NFSd/disk stats gmetrics to calculate per second
rates for most metrics plus with disk stats you can poll different disks
(separate invocation for now :-()
http://vuksan.com/linux/ganglia/
Vladimir