Hi,
this is seems as trouble with your rrdtool. This old problem and fixed long time ago (by -Y flag in rrd graph cmd).
Which version of rrdtool you use?
I have a similar graphs, where all fine (and I not found any graphs with such trouble):
On Fri, Feb 5, 2016 at 8:14 PM, Dirk-Willem van Gulik dirkx@webweaving.org wrote:
With a fresh install - seeing quite a few cases like below — odd Y axis legend. The values are roughly at 2.2 and 2.0 and only happen for some ranges.
Not sure if this is an old or new problem. Fair to assume this is purely something RRD related/bug ?
Dw.
Performance & Output RRDTool Output: 1233x369 Total time: 0.279 | RRDtool time: 0.277s
RRDTool Command rrdtool graph /tmp/KjJTF5RCwhWzDBRY.png -Y --alt-autoscale --start 1454609307 --end 1454695707 --width 1152 --height 300 -c BACK#EEEEEE00 -c SHADEA#EEEEEE00 -c SHADEB#EEEEEE00 -c FONT#000000 -c CANVAS#FFFFFF00 -c GRID#a5a5a5 -c MGRID#FF9999 -c FRAME#5e5e5e -c ARROW#5e5e5e -R normal --font LEGEND:8:'DroidSansMono,DejaVuSansMono' --font AXIS:7:'DroidSansMono,DejaVuSansMono' --font-render-mode normal -E COMMENT:'Amperes ' COMMENT:' Now' COMMENT:' Avg' COMMENT:' Min' COMMENT:' Max' COMMENT:'\l' DEF:ds16=/usr/local/XXXXXXXXX/rrd/rts.rack/sensor-current-apc-atsOutputCurrent.1.1.1.rrd:sensor:AVERAGE DEF:ds16min=/usr/local/XXXXXXXXX/rrd/rts.rack/sensor-current-apc-atsOutputCurrent.1.1.1.rrd:sensor:MIN DEF:ds16max=/usr/local/XXXXXXXXX/rrd/rts.rack/sensor-current-apc-atsOutputCurrent.1.1.1.rrd:sensor:MAX LINE1.25:ds16#1f78b4:'Output ' GPRINT:ds16:LAST:%6.1lf%s GPRINT:ds16:AVERAGE:%6.1lf%s GPRINT:ds16min:MIN:%6.1lf%s GPRINT:ds16max:MAX:%6.1lf%s COMMENT:'\l' HRULE:0#555555
RRDTool Files Used No RRD information returned. This may be because the graph module doesn't yet return this data.
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