Have a SEO question you never found a good answer for? Tired of hearing the same cookie-cutter answers, about write good content and work hard? Post your question about SEO and I'll answer it.
Any particular page is down due to traffic or your entire site. Its doesn't matter if your site in unable to carry the load then its time for upgrade. In your case your hosting provider should have notified you through email.
Web Server & Resource optimisation and confirm resource utilisation. Select keywords and post quality content for rank up.