[Xymon] Custom 60 second interval test still has 5 min interval graph

Scot Kreienkamp Scot.Kreienkamp at la-z-boy.com
Wed Jul 1 01:49:41 CEST 2015


Hi JC,

Maybe I missed it when it's staring me in the face, but I still don't understand why it's not showing the 1 minute resolution when it is saving it into the RRD.  The resulting RRD from the configuration I posted has a 60 second step, a 180 second heartbeat, and the data is being stored every 60 seconds, all of that verified by rrdtool dump.  So I have successfully increased the resolution of the RRD; but even though it's stored every minute the resulting graph only registers changes in values every 5 minutes.


Scot Kreienkamp  | Senior Systems Engineer | La-Z-Boy Corporate
One La-Z-Boy Drive | Monroe, Michigan 48162 |  Office: 734-384-6403 |  |  Mobile: 7349151444 | Email: Scot.Kreienkamp at la-z-boy.com
> -----Original Message-----
> From: J.C. Cleaver [mailto:cleaver at terabithia.org]
> Sent: Tuesday, June 30, 2015 7:13 PM
> To: Scot Kreienkamp
> Cc: xymon at xymon.com
> Subject: Re: [Xymon] Custom 60 second interval test still has 5 min interval
> graph
>
> This is correct.
>
> The data format for a "round robin database" is fixed at creation time for
> a certain number of data points at a certain interval, using a certain
> method for combining them (typically 'AVERAGE' by default).
>
> When you're increasing the number of data points you're submitting, you're
> putting more data in, but you're still only going to see 5 minute average
> "chunks" (and the larger ones). To actually increase the resolution you're
> saving at, you'll want to use (I believe) the 'rrdtune' command.
> Alternatively, some find it easier to export/re-import the data into a new
> file.
>
>
> HTH,
> -jc
>
>
> On Tue, June 30, 2015 2:21 pm, Scot Kreienkamp wrote:
> > Hey everyone,
> >
> > I created a custom test and RRD definition because I wanted to reduce the
> > interval time on a few graphs from 5 minute resolution to 1 minute.  I got
> > the data to be logged once every minute, which I verified is hitting the
> > RRD.  The problem is that when I view the graph it's still got a
> > resolution of 5 minutes.
> >
> > Here's the partial RRDTool dump:
> >
> >                         <!-- 2015-06-30 16:53:00 EDT / 1435697580 -->
> > <row><v> 1.0033333333e+01 </v></row>
> >                         <!-- 2015-06-30 16:54:00 EDT / 1435697640 -->
> > <row><v> 1.0550000000e+01 </v></row>
> >                         <!-- 2015-06-30 16:55:00 EDT / 1435697700 -->
> > <row><v> 5.6333333333e+00 </v></row>
> >                         <!-- 2015-06-30 16:56:00 EDT / 1435697760 -->
> > <row><v> 7.3166666667e+00 </v></row>
> >                         <!-- 2015-06-30 16:57:00 EDT / 1435697820 -->
> > <row><v> 7.5000000000e+00 </v></row>
> >                         <!-- 2015-06-30 16:58:00 EDT / 1435697880 -->
> > <row><v> 6.2500000000e+00 </v></row>
> >                         <!-- 2015-06-30 16:59:00 EDT / 1435697940 -->
> > <row><v> 7.5500000000e+00 </v></row>
> >                         <!-- 2015-06-30 17:00:00 EDT / 1435698000 -->
> > <row><v> 9.3333333333e+00 </v></row>
> >                         <!-- 2015-06-30 17:01:00 EDT / 1435698060 -->
> > <row><v> 5.2666666667e+00 </v></row>
> >                         <!-- 2015-06-30 17:02:00 EDT / 1435698120 -->
> > <row><v> 7.0666666667e+00 </v></row>
> >                         <!-- 2015-06-30 17:03:00 EDT / 1435698180 -->
> > <row><v> 6.4000000000e+00 </v></row>
> >                         <!-- 2015-06-30 17:04:00 EDT / 1435698240 -->
> > <row><v> 6.4000000000e+00 </v></row>
> >                         <!-- 2015-06-30 17:05:00 EDT / 1435698300 -->
> > <row><v> 1.3000000000e+01 </v></row>
> >                         <!-- 2015-06-30 17:06:00 EDT / 1435698360 -->
> > <row><v> 9.2000000000e+00 </v></row>
> >                         <!-- 2015-06-30 17:07:00 EDT / 1435698420 -->
> > <row><v> 3.4650000000e+01 </v></row>
> >                         <!-- 2015-06-30 17:08:00 EDT / 1435698480 -->
> > <row><v> 5.7200000000e+01 </v></row>
> >                         <!-- 2015-06-30 17:09:00 EDT / 1435698540 -->
> > <row><v> 5.0283333333e+01 </v></row>
> >                         <!-- 2015-06-30 17:10:00 EDT / 1435698600 -->
> > <row><v> 4.4100000000e+01 </v></row>
> >                         <!-- 2015-06-30 17:11:00 EDT / 1435698660 -->
> > <row><v> 4.1500000000e+01 </v></row>
> >                         <!-- 2015-06-30 17:12:00 EDT / 1435698720 -->
> > <row><v> 2.4500000000e+01 </v></row>
> >                         <!-- 2015-06-30 17:13:00 EDT / 1435698780 -->
> > <row><v> 1.2000000000e+01 </v></row>
> >
> > So the data is getting logged every 60 seconds.  It's also rolling up to
> > the 5 second, etc, values.
> >
> > Here's the line from xymonserver.cfg:
> >
> > SPLITNCV_cpustat="*:GAUGE:180:0:100"  #Configure for 60 second
> intervals,
> > range of 0-100
> >
> >
> > Here's the lines from rrddefinitions.cfg:
> > [cpustat]
> > -s 60
> >         RRA:AVERAGE:0.1:1:120
> >         RRA:AVERAGE:0.5:5:576
> >         RRA:AVERAGE:0.5:30:576
> >         RRA:AVERAGE:0.5:120:576
> >         RRA:AVERAGE:0.5:1440:576
> >         RRA:MAX:0.1:1:120
> >         RRA:MAX:0.5:5:576
> >         RRA:MAX:0.5:30:576
> >         RRA:MAX:0.5:120:576
> >         RRA:MAX:0.5:1440:576
> >
> > Here's the graph definition:
> > [cpustat]
> >         FNPATTERN ^cpustat.(.+).rrd
> >         TITLE % CPU usage
> >         YAXIS Percent
> >         DEF:p at RRDIDX@=@RRDFN@:lambda:MAX
> >         LINE2:p at RRDIDX@#@COLOR@:@RRDPARAM@
> >         GPRINT:p at RRDIDX@:LAST: \: %5.0lf (cur)
> >         GPRINT:p at RRDIDX@:MAX: \: %5.0lf (max)
> >         GPRINT:p at RRDIDX@:MIN: \: %5.0lf (min)
> >         GPRINT:p at RRDIDX@:AVERAGE: \: %5.0lf (avg)\n
> >
> >
> >
> >
> > I had read that RRDTool should use the lowest resolution available, which
> > is 1 minute for this RRD.  So why are the graphs not going less than 5
> > minute intervals when zooming in?  Any ideas?
> >
> > Thanks!
> >
> > Scot Kreienkamp | Senior Systems Engineer | La-Z-Boy Corporate
> > One La-Z-Boy Drive | Monroe, Michigan 48162  | * 734-384-6403 | | *
> > 7349151444 | *  Scot.Kreienkamp at la-z-boy.com<mailto:%7BE-mail%7D>
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> boy.com/> |
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