While running ATM7 0.3.18 and 0.3.12 (i think it was 12, i've upgraded since then) I had an issue with the server thinking it had crashed because it was reaching the time-out limit for a tick. By default this is 60s/tick. Seconds PER tick. So i bumped that up, realized it was a good limit when things got weirdly laggy when hitting that limit. Not ping laggy, but mobs and updates moving slow laggy.

So i ran a profiler, went about checking what was going on, etc, and found the culprit. Since i had a few players all spread out in the world, there were 3-4 leafcutter ant colonies from Alex's Mobs within simulation distance. With the default server settings, those ants take up a LOT of tick-time to pathfind. Especially when there are over 600 of them.

I've since then turned them off in my Alex's Mobs settings, and this is a formal suggestion to do so (or at least turn them down) for the default server parameters with the multiplayer-server package of the modpack.

Though I recognize I might be a bit out of date since recently the Alex's Mob's mod was removed, but at least as a standing suggestion I'd suggest it if there are plans to re-add the mod.

We removed Alex's mobs 2 versions ago to keep the resources for future mods that are dropping. We noticed the mod is great for single player but not so great with large servers.