We use the memory-map-plugin to track the memory consumption of our embedded software over time. Basically it's purpose is a svn/git-blame for memory: "Hey Peter, svn commit <xy> took 500 bytes of fast memory!"
Therefore it would be pretty handy to have a trending graph like the SLOC (lines of code) plugin provides.

Example1: how SLOC looks like
https://wiki.jenkins-ci.org/download/attachments/37322820/cloc_trend.png

Example2: how our memory usage looks like, you can tell that there's something happening, but you can't really tell how mouch in bytes
(attachment)