About an hour ago, DB1 (our first database server) started acting up and going REAL slow, and we ended up rebooting it. It ran a self-check on the database which delayed it another 45 minutes, but now it is done and processing traffic normally. However, it will take a while to catch back up with real time.
All site IDs below 15,000 or so are on this server. For future reference, to find out what server any of your sites are on (each one could theoretically be on a unique server), hit your site preferences page. It’s one of the items listed on that page.