cpu.graph

title   "Combined CPU Usage"
vtitle  "percent"
area    :stacked

field :iowait, :scale => 0.001,
               :color => "red",
               :alias => "IO Wait",
               :data  => "sumSeries(derivative(mw*munin.cpu.iowait))"

field :system, :scale => 0.001,
               :color => "orange",
               :alias => "System",
               :data  => "sumSeries(derivative(mw*.munin.cpu.system))"

field :user, :scale => 0.001,
             :color => "yellow",
             :alias => "User",
             :data  => "sumSeries(derivative(mw*.munin.cpu.user))"

dash.yaml

:name: Email Metrics
:description: Hourly metrics for the email system
:link: email

io.graph

title   "Combined IO"
area    :first
vtitle  "blocks"

field :write, :color => "blue",
               :alias => "Writes",
               :data  => "sumSeries(derivative(mw*.munin.iostat.dev*_write))"

field :read, :color => "green",
               :alias => "Reads",
               :data  => "sumSeries(derivative(mw*.munin.iostat.dev*_read))"

example dash http://twitpic.com/6w62vd