Monitoring multiple values

We've taken to using Graphite for metrics. It's a one-liner to put values
collected from xymon into graphite; it's also possible to alert on graphite
values in xymon

(I confess I didn't write those scripts, but it's basically grabbing info
from a URL designed for that purpose)

Our tools are based on these, written by Dewey Sasser
https://github.com/dmsasser/graphiteutils