Custom 60 second interval test still has 5 min interval graph

list Scot Kreienkamp
Tue, 30 Jun 2015 23:49:41 +0000
Message-Id: <user-6a3b33e280dc@xymon.invalid>

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: XXX-XXX-XXXX |  |  Mobile: XXXXXXXXXX | Email: user-9678697f1438@xymon.invalid

-----Original Message-----
From: J.C. Cleaver [mailto:user-87556346d4af@xymon.invalid]
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
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