I've tried moving the appdata/config files around. Even with no one on, I see similar messages! (Though usually not quite that high when no one on, it is still there and starts immediately as soon as I boot up the server.) If I go to the web UI I see a bunch of these messages - ' : Can't keep up! Is the server overloaded? Running 35616ms or 712 ticks behind'. Basically anything more than walking speed and you have to keep pausing and wait for loading. It takes FOREVER now to get between points any distance apart.

Like we'll ride a horse or row a boat somewhere and you go a short distance and then have to wait 10-15 seconds to load the next chunk of land, go a little, wait for it to load, etc etc. If you go any distance it gets to the point where it stops loading the world and takes forever to load the next section. Walking, swimming, boating, and especially riding a horse has gotten bad. Riding on our railways has gotten REALLY slow and glitchy. Now it has gotten to the point, especially when there are multiple people on, where if we mine a block it takes a couple seconds or more to 'pop' and give us the resource. From the original spawn point, we've built bases 3000+ away (according to F3 coordinates) in various directions and connected them via paths, tunnels, and some with rails. We have spread and expanded pretty far and done a decent amount of landscaping (creating paths/tunnels between bases and such) on the server.

It has been a fun game for the whole family! Just playing standard stock vanilla MC and have gotten myself, wife, and 2 kids all playing together! When we started it was good, but it has gotten pretty badly laggy the past week or two. I installed this docker on my unRAID server about a month ago. Hopefully you Minecraft server vets can help or give me ideas to check.

Minecraft launcher update 10/25/17