I've noticed that graphs with lots of values which have min/max warn limits look extremely crowded - all these min/max limits are drawn as lines via rrdtool HRULE. I haven't found a way to disable drawing of these warn lines.
I still need munin to check for these warn values (which makes graphs red, sends emails, e.t.c), but I don't want to see warn lines. I typically know where they should be.
Any suggestions how to disable drawing warn lines?