I appreciate that, however these sites are down again, this time for over 3 hours now. (I have a ticket in, and email to helpline.)
The problem would seem to be a lockup in the application pool? I have had this problem before, but win38 and 39 seem to be more prone to it than others. It's certainly happening a lot more often than it did on these sites than the servers they were moved from. I hope that's going to be rectified.
I've been told it's not possible to monitor each pool independently, but I can certainly monitor my own. I just happened to be sleeping this time when it sent me an email 3 hours ago.... I'd be happy to have my own monitor service email support when ASP stops responding.