I don't edit very often anymore, but I saw this as it happened to be be immediately above something else....
https://secure.wikimedia.org/wikipedia/en/wiki/Wikipedia:Templates_for_delet...
A large 68K template, listing all the congresscritters ever elected in NY, organized by district number. Meta template usage. Lots of template calls.
All the information is already in a 100K+ master list article, or another organized by district, or another series of district articles.
Since all the information is also in a category, it's pointless. I've tried to suggest alternatives (such as an existing template that points to each district article, where the same information is already displayed).
Mostly occurs on 1,900+ stubs, where the underlying edit is only a few K. As displayed, the huge template overwhelms the tiny articles.
Nominated for deletion because of its size. Thought folks might like to know about it -- previous discussions of template server thrashing.