I've been trying to find the source of performance issues on a otherwise functioning modded server.
To get insight in what is using how much CPU I use visualvm version 1.4.2
I've since stripped away every mod I had to find that the only way to lose this thread is going back to vanilla.
Perhaps this is not actually a problem, and simply a bug in visualvm but I lack the understanding to figure that out myself.
Ubuntu 18.04.2 LTS
Linux kernel version: 4.15.0-46-generic
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)
forge version: 1.12.2-14.23.5.2768 (current recommended)
Debug log: