Forge system currently running on 1.12.2-14.23.4.2726 on a Google Compute Engine instance running Debian Linux 3.16. I've been running this system for the last couple of years. I've seen these errors in the logs occasionally during that time:
Can't keep up! Did the system time change, or is the server overloaded?
Recently, though, this has been getting severe enough that the server crashes and restarts, then crashes again once people start logging in. I upgraded from 1.9.4 to the freshest install of 1.12.2, I've tried updating all Debian packages I found updates for, and I've even updated the Google Cloud components to the most recent, but it continues to happen.
Any idea what I can do to address this?