(Disclosure: I work at New Relic) New Relic is made for monitoring web apps, so I can't imagine anything better suited for your needs. We also have partnershi

(Disclosure: I work at New Relic) New Relic is made for monitoring web apps, so I can't imagine anything better suited for your needs. We also have partnerships with most of the hosting providers, so you're likely to be able to use New Relic Standard service for free. The basics: http://newrelic.com/ http://newrelic.com/ Top partners: http://newrelic.com/about/partners http://newrelic.com/about/partners Good luck on your launch!