Tracks performance issues on VPS

[DPBiff]

I've installed & have Tracks 2.7.0 running on a VPS.
I start the app through a terminal: cd /home/blahblahblah/tracks && RAILS_SERVE_STATIC_FILES=TRUE bundle exec bin/rails server -e production & disown
This works just fine but between 12 & 32 hours later, the app is basically unresponsive. No error it just doesn't respond. I need some direction to determine where the issue may be.

Thanks.