[rrd-users] Re: One area printed over another

David OBrien dobrien at naccrra.org
Sun Jan 4 04:32:30 MET 2004

I agree the stack method works very well I am using it at


graphing memory usage.. But can someone write a CDEF that would
show how to place the larger value behind the smaller value in a
non-stack situation like this...


I have played with it a bunch and can't quite figure it out.


At 06:29 PM 1/3/2004, Justin Hawkins wrote:
>On Sat, Jan 03, 2004 at 11:56:23PM +0100, Benni Graf wrote:
> > Hi!
> >
> > Right now I'm learning how to produce some nice graphs with rrdtool and
> >   it's pretty amazing, but a problem came up:
> >
> > I want to print two Areas in one Graph: One with used Disk Space and
> > another one with free Disk Space.
> >
> > Currently I've got more used than free Disk Space, so everything is
> > fine, because i've written the AREA-command for the used Disk Space
> > before the AREA-command for the free Disk Space.
>The approach I've used is to AREA graph the total disk, and LINE2 the
>used disk.
>In this way as the line climbs to the top of the solid colour, you know
>you are running out of disk space.
>Also, in more historical graphs, you can see disk upgrades by the sudden
>jump in the solid colour block :-)
>         - Justin
>Justin Hawkins | justin at hawkins.id.au
>                | http://hawkins.id.au
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