[rrd-users] 'graph' command printing to stdout

[ogjunk-rrd at yahoo.com]

Hello,

I'm making my first steps with RRD (used MRTG several years ago), and
I'm noticing that 'rrdtool graph...' command prints out something to
stdout.  In my case it prints: 800x205

This happens when I graph the RRD data using this command:

$RRD graph memory-120.png --step 120 --imgformat PNG \
     --width 720 --height 150 --base 1024 \
         DEF:swap=$DIR/memory.rrd:free-swap:AVERAGE \
         DEF:physical=$DIR/memory.rrd:free-physical:AVERAGE \
         DEF:buffer=$DIR/memory.rrd:free-buffer:AVERAGE \
         CDEF:sum=swap,physical,+,buffer,+ \
         AREA:sum#dddddd:"" \
         LINE2:swap#00cc00:"free swap memory" \
         LINE2:physical#cc0000:"free physical memory" \
         LINE2:buffer#0000cc:"free kernel buffers" \
         LINE1:sum#aaaaaa:"sum of free memory"


Is this 800x205 normal?  What does it represent, and is there a way to
make graphing quiet?  This way running RRD graphing from cron is a bit
annoying, and redirecting stdout is doable, but maybe there is a better
approach.

Thanks,
Otis
P.S.
There must be ready-made scripts that gather data for used/free disk
space, network interface traffic, etc.  I thought I found find those in
contrib/, but they aren't there.  Is there a collection that I could
make use of somewhere, or do I need to reinvent the wheel?  Thanks.


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