Graphing 0 while data is present

Hello,

For a while now I've been trying to figure out why one of my graphs
will always graph 0s but doing rrdfetch or even printing and operations
on the data via CDEF and VDEF functions produce the right results.

The graph can be seen at http://p.oyam.ca/junk/mem.png and the command
used to generate it is at the end of this message. I realized there is
a whole lot of extra stuff there, but that's from experiments and trial
and error getting it to graph at least something. The original script
uses full paths, I've just modified it here to make it more readable
and protect the innocent :)

Any ideas or suggestions?

Thanks,
mayo


/usr/local/bin/rrdtool graph ./rrd/mem.png \
--start \
-86400 \
-y 1:1 \
-a PNG \
-w 600 \
-h 150 \
-b 1024 \
-X 1 \
-t 'Memory Usage' \
--font DEFAULT:7:./rrd/resources/lucida_console.ttf \
-n LEGEND:7:./rrd/resources/lucida_console.ttf \
-c MGRID#888888FF \
-c GRID#C8C8C8FF \
-c ARROW#636363FF \
-c FRAME#636363FF \
DEF:shared_raw=./rrd/mem.rrd:shared:AVERAGE \
DEF:cache_raw=./rrd/mem.rrd:cache:AVERAGE \
DEF:buf_raw=./rrd/mem.rrd:buf:AVERAGE \
DEF:free_raw=./rrd/mem.rrd:free:AVERAGE \
DEF:total_raw=./rrd/mem.rrd:total:AVERAGE \
DEF:swapfree_raw=./rrd/mem.rrd:swapfree:AVERAGE \
DEF:swaptotal_raw=./rrd/mem.rrd:swaptotal:AVERAGE \
CDEF:shared=shared_raw,1024,* \
CDEF:cache=cache_raw,1024,* \
CDEF:buf=buf_raw,1024,* \
CDEF:free=free_raw,1024,* \
CDEF:total=total_raw,1024,* \
CDEF:swapfree=swapfree_raw,1024,* \
CDEF:swaptotal=swaptotal_raw,1024,* \
VDEF:totalmax=total,MAXIMUM \
VDEF:cachemax=cache,MAXIMUM \
VDEF:cacheavg=cache,AVERAGE \
VDEF:cachemin=cache,MINIMUM \
VDEF:cachecur=cache,LAST \
VDEF:bufmax=buf,MAXIMUM \
VDEF:bufavg=buf,AVERAGE \
VDEF:bufmin=buf,MINIMUM \
VDEF:bufcur=buf,LAST \
VDEF:freemax=free,MAXIMUM \
VDEF:freeavg=free,AVERAGE \
VDEF:freemin=free,MINIMUM \
VDEF:freecur=free,LAST \
COMMENT:"\n" \
COMMENT:" " \
COMMENT:"Current " \
COMMENT:"Maximum " \
COMMENT:"Average " \
COMMENT:"Minimum\n" \
LINE1:cache#258E00:"Cache " \
GPRINT:cachecur:"%3.2lf %s" \
GPRINT:cachemax:" %3.2lf %s" \
GPRINT:cacheavg:" %3.2lf %s" \
GPRINT:cachemin:" %3.2lf %s\n" \
AREA:buf#E79429:"Buffers " \
GPRINT:bufcur:"%3.2lf %s" \
GPRINT:bufmax:" %3.2lf %s" \
GPRINT:bufavg:" %3.2lf %s" \
GPRINT:bufmin:" %3.2lf %s\n" \
AREA:free#DB3A3A:"Free " \
GPRINT:freecur:"%3.2lf %s" \
GPRINT:freemax:"%3.2lf %s" \
GPRINT:freeavg:" %3.2lf %s" \
GPRINT:freemin:" %3.2lf %s\n" \
LINE1:total#FF0000:"Total Memory " \
GPRINT:totalmax:"%3.2lf %s\n" \
COMMENT:"\n" \
COMMENT:"Last updated\: date"