[rrd-users] overlay plot question

[Stefan Parvu]

Hi,

Any ideas how can I do in rrd something like:
http://www.wolframalpha.com/input/?i=MSFT%2C+AAPL%2C+GOOG%2C+YHOO
(check "Relative price history" a bit down on page)

My data I want to plot, lets say is 
 CPU Util % (Usr + System time across all CPUs)
 run-queue length

The raw data would look like this:

1268690759:100.00:13.25
1268690819:99.08:6.45

Its not exactly a STACK plot. Is it possible such overlay plot
in rrd ? Im using rrdtool 1.4.x. How else people couple together
many metrics in one plot without STACK representation.

Thanks,
Stefan