[rrd-users] This isn't normalization

Evan Langlois uudruid74 at gmail.com
Fri Oct 24 07:04:55 CEST 2014

OK, I'm using Cacti, but the problem seems to be in rrdtool, or rather 
I'm not passing the right information.  I'm monitoring how much 
bandwidth is available on a metered connection.  When the graph hits 0, 
I'm out (and throttled).  Simple stuff.

The problem.  I have maximum 15GB per month of "anytime" data and 20GB 
of "nighttime".  The graph is telling me that I have 14.95GB remaining 
in the former and 20.38GB in the latter.  Now, how could it possibly be 
giving me a value that is MORE than the greatest value being fed to it.  
I am using GAUGE/LAST for everything.

Here is a clip from rrdtool info.  How do I use the last_ds values? 
Those are the correct values.  Thats what I want graphed.  Thats what I 
want to display.  I have no idea what the value lines are or what they 
are so much larger than the real values (larger than the max).  I don't 
see how normalization could inflate values.  Any help would be GREATLY 

ds[anytime].type = "GAUGE"
ds[anytime].minimal_heartbeat = 300
ds[anytime].min = 0.0000000000e+00
ds[anytime].max = 1.5000000000e+07
ds[anytime].last_ds = "14600000"
ds[anytime].value = 2.9200000000e+07
ds[anytime].unknown_sec = 0
ds[offtime].index = 1
ds[offtime].type = "GAUGE"
ds[offtime].minimal_heartbeat = 300
ds[offtime].min = 0.0000000000e+00
ds[offtime].max = 2.0000000000e+07
ds[offtime].last_ds = "19900000"
ds[offtime].value = 3.9800000000e+07
ds[offtime].unknown_sec = 0

Thank You,
Evan Langlois

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