User blog:Gavin316/Node-count limit exceeded

This is more of a general question and not really a blog but I came across something new on here that has messed up a couple of my episodes. It says that a node-count limit exceeded. I have no clue as to what a nod-count is and why I have exceeded the limit of it. It only showed up in the final episodes of my first two fanons (Dominican Republic and Terra Nova). I have looked at both of those final episodes in the past and I never saw this node-count thing so I was wondering if it was something new happening with the site or if it has been here all along and I just never realized it.

Also how the heck can I get rid of it? Any help on this matter would be greatly appreciated.