Big lag spikes on Unraid

I have a NeoForge 21.1.209 server set up through itzg’s docker container. Recently we have been seeing really severe lag spikes and slow chunk loading I took a spark profile of the major spikes (all of them were >1000ms) and saw that all of them were spending nearly 100% of the tick in PlayerList.saveAll(), stuck on a file write. I tried quite a few things to troubleshoot, including testing the current world without mods, in a new world with and without mods, and nothing seems to help here. The docker’s install folders are all on an unRAID share that’s set to cache only, so it should only be using the single NVMe drive in my cache pool. It was initially formatted to btrfs; I tried switching it to xfs when I saw this discussion but it didn’t seem to help. The share is also exported and accessible via SMB, though I’m not sure if that affects write speeds Has anyone seen a similar issue before?

spark

spark is a performance profiler for Minecraft clients, servers, and proxies.

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Slow chunk generation issues · itzg docker-minecraft-server · Dis...

Enhancement Type Not sure Describe the enhancement I'm running my server on an unraid pc with a 5700g on a 860 evo ssd and with 10gb of ram allocated to it but for some reason i'm not even ...