Our database servers have been generating some alerts today, where the monitoring system can't log into the servers to check on them. I can't log in either, but as best I can tell the databases are still running, or you wouldn't be seeing this. There is probably an issue with memory usage or excessive disk I/O, but it's kind of hard to troubleshoot at the moment. I would expect DW to be down for a while at some point today in order to restart the databases and/or reboot the servers. More info when mark's had a chance to look.