We’re currently seeing record levels of traffic right now. Since the beginning of August our traffic has gone from 9M hits per day to 14M hits per day today, which is a significant increase in traffic. Fortunately our servers were able to handle the extra load, but we started getting near capacity.
Yesterday I started working on taking one of the servers from the classic site and moving it into the NGS cluster. We finished this a couple of hours ago and we now have a maximum limit of 227 queries per second (qps).
If you find any spurious troubles with the site in the next day or so, please open a ticket.