The nolagg plugin had a std. setting that limited items to 80 per chunk. I increased that now to 200. So if you have a farm, it will most likely output max 200 items per harvest. I hope this is enough. You can add another button that does the rest and harvest it in section.
Uncovery Minecraft
I think just to test, we should probably increase the server draw/load distance by 2 or so chunks just to be sure.
What exactly would we be testing by changing that?