Thanks for your interest. I don't recall saying it happened two days ago though - it started about 12 days ago and is very intermittent. We're about 14 hours total into troubleshooting, reinstalling from R80.30 ISO (twice). Patch to latest hotfix, migrate export/import, etc, push policy, all is good. Wait x amount of minutes/hours/days, then same problem.
My gut says it's hardware sensor related - or maybe ILMI related because only reseating the power cables will bring it back to the point where the GAIA portal and the dashboard are useable again. But that's just my opinion. As soon as that database timeout message appears in /var/log/messages, that's it for the portal and dashboard.