Except that while Graphite is a "real web application", it's generally internal-facing only. As such, I never looked at it as needing a true "production-ready" RDBMS with real concurrency. And to be honest, we got by just fine with it in production at Heroku and GitHub, at heavy volume, running in a single server on SQLite. It never bit us, and all things considered, was a reasonable choice.
That said, knowing what I know now, I would've never done that. ;-)
That said, knowing what I know now, I would've never done that. ;-)