Chat uses large amounts of server resources, even with only a few users

We are seeing tremendous amounts of server usage with the chat plugin, even when we only have 10 or less people chatting in one chat. So much that our host, LiquidWeb, thought it was an attack.

I have minimized the window in the bottom corner, and disable the check while minimized setting.

What else can we do to configure this properly so it's not such a resource hog? We can't have our site bogged down and take minutes to load, but we very much like the concept of the chat plugin.