Seems we have a memory leak in Lemmy, I will report it upstream and see what they say since we have 4GB RAM now and it was fine with 2GB for days and now goes down with 4 over 24 hours :|
All I will say is bloody node.js
./syslog:Jun 18 04:38:38 ip-172-31-33-220 kernel: [142633.319174] Out of memory: Killed process 1349 (node) total-vm:2700484kB, anon-rss:2004100kB, file-rss:0kB, shmem-rss:0kB, UID:0 pgtables:18016kB oom_score_adj:0
Reported upstream, in the meantime I may need to do a quick reboot every 24 hours where the server may be down for 1-2 minutes: https://github.com/LemmyNet/lemmy/issues/3183