I agree with this, and it's interesting how many open source tools there are that create these graphs and charts, store tons of data, etc. All with a mostly "eyes on glass" bent, which doesn't scale terribly well.

When, really, what's more important is actionable events, correlation, duplicate suppression, escalating notifications, etc. Something like what "Netcool Omnibus" and other commercial software does. Isolate actionable problems and make sure somebody owns the problem.

But for reasons I don't understand, there isn't much in the open source world in that space.