Hi Michael,
If I generate the graph with observium’s command having no CDEF’s but changing alt-autoscale-max to alt-autoscale, it still produces the same bad scale issue.
I’m using RRDtool 1.4.7 btw.
Sandy
On 26/02/2016, 09:28, "observium on behalf of Michael" <observium-bounces@observium.org on behalf of observium@smarsz.com> wrote:
Does the graph change if you use the original Observium rrdtool command (so no CDEF *,1000), but substituting
--- --alt-autoscale-max +++ --alt-autoscale
???
According to the rrd source, it should be able to autoscale the axis down to atto (10e-18).
What version of rrdtool are you using?
Cheers,
Michael
On 26 Feb 2016, at 7:51 PM, Sandy Breeze sandy.breeze@eu.clara.net wrote:
Well this is what Observium displays when graphing the sensor:
<535603A7-763F-4BB3-9F39-47E9BB914CC0.png>
But if I use the same RRD and graph it myself, I get:
<B860B534-7C7C-4031-AEC5-32D397F5335E.png>
This graph was generated with: rrdtool graph rrd.png \ -Y \ --lower-limit 0 \ --alt-autoscale-max \ --start 1456347228 \ --end 1456433628 \ --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 \ -A COMMENT:' Last Max\n' \ DEF:sensor=/srv/www/iss/observium/rrd/t40-ar14/sensor-power-cisco-entity-sensor-58513400.rrd:sensor:AVERAGE \ DEF:sensor_max=/srv/www/iss/observium/rrd/t40-ar14/sensor-power-cisco-entity-sensor-58513400.rrd:sensor:MAX \ DEF:sensor_min=/srv/www/iss/observium/rrd/t40-ar14/sensor-power-cisco-entity-sensor-58513400.rrd:sensor:MIN \ CDEF:sensor_mult=sensor,1000,* \ CDEF:sensor_mult_max=sensor_max,1000,* \ CDEF:sensor_mult_min=sensor_min,1000,* \ AREA:sensor_max#c5c5c5 \ AREA:sensor_min#ffffffff \ LINE1.5:sensor_mult#cc0000:'Transceiver Rx Power -' \ GPRINT:sensor_mult_min:LAST:%6.2lfdbMW \ GPRINT:sensor_mult_max:MAX:%6.2lfdbMW\l \ HRULE:0.0009585#999999::dashes
Sandy
On 25/02/2016, 23:46, "observium on behalf of Adam Armstrong" <observium-bounces@observium.org on behalf of adama@memetic.org> wrote:
Pictures speak a thousand words.
adam.
On 25/02/2016 21:30:43, Sandy Breeze sandy.breeze@eu.clara.net wrote:
Hi,
Currently running: 0.16.1.7533 (26th January 2016)
We’ve noticed the DOM optic power sensor data to be graphed at 0W all the time. Noticing the ‘value’ figure is correct on the optic’s power status page, we subsequently found all data in the RRD to be correct. eg: <!-- 2016-02-25 20:50:00 GMT / 1456433400 --> <row><v>6.1840000000e-04</v></row> <!-- 2016-02-25 20:55:00 GMT / 1456433700 --> <row><v>6.1300000000e-04</v></row> <!-- 2016-02-25 21:00:00 GMT / 1456434000 --> <row><v>6.1435000000e-04</v></row>
It just seems the rrdtool graph function is not rendering this sensor data with anything useful. The graph is being generated with something like this:
rrdtool graph /tmp/FLjPO7rtfRJQOfGn.png -Y --lower-limit 0 --alt-autoscale-max --start 1456347228 --end 1456433628 --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 -A COMMENT:' Last Max\n' DEF:sensor=/srv/www/iss/observium/rrd/t40-ar14/sensor-power-cisco-entity-sensor-58513400.rrd:sensor:AVERAGE DEF:sensor_max=/srv/www/iss/observium/rrd/t40-ar14/sensor-power-cisco-entity-sensor-58513400.rrd:sensor:MAX DEF:sensor_min=/srv/www/iss/observium/rrd/t40-ar14/sensor-power-cisco-entity-sensor-58513400.rrd:sensor:MIN AREA:sensor_max#c5c5c5 AREA:sensor_min#ffffffff LINE1.5:sensor#cc0000:'Transceiver Rx Power -' GPRINT:sensor:LAST:%6.2lfW GPRINT:sensor:MAX:%6.2lfW\l HRULE:0.0009585#999999::dashes
Seeing the data collected is in the order of 10^-4 d.p. small, how can we stop this being rounded to 0 all the time on a the graph? I understand completely this is rrdtool not automatically choosing a very good scale for you, but is there any way to detect these low values and fix them up for the graphs by order of 1000 say?
Cheers
Sandy
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