I had a simple setup with about 7 infinite emitters spiraling into a large collision channel and, over the course of two hours, the server began to overload to the point where nobody could log in. I don't really have any specific debug information for the particular issue, but I figured it was worth noting.

Closing due to lack of feedback. If you're still having this issue, please open a new ticket.

Hmmm...it's possible that I'm not unloading entities properly...could you possibly add screenshots of your setup?

I wasn't done making the collider when I had left it running on the server. I will make a model of where I was in building the design and screenshot it for you when I get some free time tomorrow. I suppose it's also worth noting that it was sending particles with a 1 second interval.