debugging rrdtool?

hello

I'm running rrdtool on FreeBSD to monitor:
- server cpu load
- throughput
- mail count
- requests per second on apache/mysql

I'm doing my own scripts, except the one for uptime:

Code: 
DATA=`uptime | sed -e 's/^.*average.*: \(.*\)$/\1/' -e 's/ //g' | awk -F, '{ printf("%.0f:%.0f",$1*100,$3*100); }'`

/usr/local/bin/rrdtool update /home/mrtg/public_html/rrd/cpuload.rrd N:$DATA
the command/parameter executed was "/usr/local/bin/rrdtool update /home/mrtg/public_html/rrd/cpuload.rrd N:37:23"

so it seens it's correct...

I tried "rrdtool dump cpuload.rrd", but it doesn't say to much... the last entries are:

<!-- 2005-09-29 23:40:00 BRT / 1128048000 --> <row><v> 1.4292439762e+07 </v><v> 3.3362738783e-03 </v></row>
<!-- 2005-09-29 23:45:00 BRT / 1128048300 --> <row><v> 1.4326546910e+07 </v><v> 1.4302429152e+07 </v></row>
<!-- 2005-09-29 23:50:00 BRT / 1128048600 --> <row><v> 1.4128575068e+04 </v><v> 1.4314552706e+07 </v></row>
the problem is that this load graphic is too different from the MRTG load graphic
does rrdtool has some restrictions with small numbers (like 5, 40, 50)?

the graphic generated is very weird... the red color should be a LINE... but seens it goes up,down,up,down...

the file is attached

thanks

 

 

 

 

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