I have this often. The
VPS Hosting grinds to a hault, I contact support on chat, they resolve it by restarting something or other, but I never find out what the actual problem is, nor is it ever permantently resolved. It does just seem that the
VPS Hostings aren't powerful enough to run any kind of serious applications consistently. I've had to render one web site hosting to HTML so it didn't fall over every couple of days - which is far from ideal as it was supposed to be a dynamic, content managed site. Incidentally it ran fine on a shared server before.