Board Thread:Modded Server Technical Support/@comment-28593934-20180930180208/@comment-27219153-20180930220908

Yeah, I think it is your CPU. I would try a profiling tool like Opis just to make sure your server doesn't have some underlying issue and perhaps try switching to forge temporarily, just to confirm that the issue occurs there as well.

I'm not really sure what you're paying now/what your budget is, so it's really hard for me to suggest anything.