[rrd-users] Graph Never goes over 100M

Chris Fogel chris.fogel at intermetro.net
Wed Oct 1 19:09:06 CEST 2008

I have read the lists and googled, but cannot figure out why rrdtool
graphs all values over 100M incorrectly.I have checked my .rrd files and
the values in the db are the correct values.

In this example you will see at 8:30am, the traffic goes to 145M, but is
graphing at 45M instead, and does this for all values over 100M, then at
~14:00, the value drops back down under 100M and it graphs normally again.

Below is the code used to generate it...


rrdtool graph /var/www/localhost/htdocs/development/pngs/day/$1.png \
--rigid \
--upper-limit 200000000 \
--title "Port Bandwidth" \
--interlace --imgformat PNG \
--width=700 --height=150 \
--start "now -16h" \
--watermark "`date`" \
-v Bandwidth \
DEF:a=/var/www/localhost/htdocs/development/rrds/$2/$1.rrd:ds0:AVERAGE \
DEF:b=/var/www/localhost/htdocs/development/rrds/$2/$1.rrd:ds1:AVERAGE \
CDEF:alpha=8,a,* \
CDEF:beta=8,b,* \

COMMENT:"\t    avg.    max    last       \n" \
AREA:zeta#aaaa55:Tot \
GPRINT:zeta:AVERAGE:" %4.2lf %s" \
GPRINT:zeta:MAX:"%4.2lf %s" \
GPRINT:zeta:LAST:"%4.2lf %s\n" \
LINE1:beta#ff0000:Out \
GPRINT:beta:AVERAGE:" %4.2lf %s" \
GPRINT:beta:MAX:"%4.2lf %s" \
GPRINT:beta:LAST:"%4.2lf %s\n" \
LINE1:alpha#0000ff:In. \
GPRINT:alpha:AVERAGE:" %4.2lf %s" \
GPRINT:alpha:MAX:"%4.2lf %s" \
GPRINT:alpha:LAST:"%4.2lf %s\n"

Chris Fogel, InterMetro Communications, Inc.
805.433.8000/o, 805.433.0049/d, 805.582.1006/f
chris.fogel at intermetro.net, http://www.InterMetro.Net
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