I have some graphs in graphite which sometimes render with their top chopped off, see example below. How can I prevent this? The yMax parameter does not work for me because I don't know a max ahead of time.
I had encountered the same problem and found that even setting explicit yMax cannot work-around it (unless larger enough to cross the next "step").
Had come up with a fix quickly, see https://bugs.launchpad.net/graphite/+bug/1007480/comments/4.