I have a statistic that I'm gathering once per minute. I run a cron job
that feeds gmetric. (This is with ganglia 3.1.1 on Centos. (I compiled
it myself since it's not available by RPM.)
The data item is a counter and my gmetric command line looks like this:
gmetric -n Searches -v $COUNT -t uint32 -s positive
What I get for my minute by minute data input is this (fragment):
<database>
<!-- 2009-07-01 11:21:00 PDT / 1246472460 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:21:15 PDT / 1246472475 -->
<row><v> 2.2611111111e+01 </v></row>
<!-- 2009-07-01 11:21:30 PDT / 1246472490 -->
<row><v> 4.5222222222e+00 </v></row>
<!-- 2009-07-01 11:21:45 PDT / 1246472505 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:22:00 PDT / 1246472520 -->
<row><v> 2.2648888889e+01 </v></row>
<!-- 2009-07-01 11:22:15 PDT / 1246472535 -->
<row><v> 3.4844444444e+00 </v></row>
<!-- 2009-07-01 11:22:30 PDT / 1246472550 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:22:45 PDT / 1246472565 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:23:00 PDT / 1246472580 -->
<row><v> 7.8600000000e+00 </v></row>
<!-- 2009-07-01 11:23:15 PDT / 1246472595 -->
<row><v> 1.8340000000e+01 </v></row>
<!-- 2009-07-01 11:23:30 PDT / 1246472610 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:23:45 PDT / 1246472625 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:24:00 PDT / 1246472640 -->
<row><v> 8.6857142857e+00 </v></row>
<!-- 2009-07-01 11:24:15 PDT / 1246472655 -->
<row><v> 2.1714285714e+01 </v></row>
<!-- 2009-07-01 11:24:30 PDT / 1246472670 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:24:45 PDT / 1246472685 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:25:00 PDT / 1246472700 -->
<row><v> 4.8470588235e+00 </v></row>
<!-- 2009-07-01 11:25:15 PDT / 1246472715 -->
<row><v> 2.2619607843e+01 </v></row>
<!-- 2009-07-01 11:25:30 PDT / 1246472730 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:25:45 PDT / 1246472745 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:26:00 PDT / 1246472760 -->
<row><v> 0.0000000000e+00 </v></row>
<!-- 2009-07-01 11:26:15 PDT / 1246472775 -->
<row><v> 2.5312500000e+01 </v></row>
<!-- 2009-07-01 11:26:30 PDT / 1246472790 -->
<row><v> 8.4375000000e-01 </v></row>
<!-- 2009-07-01 11:26:45 PDT / 1246472805 -->
<row><v> 8.4375000000e-01 </v></row>
Note the zeroes.
Here are my day and hour graph: http://www.greenberg.org/graphs
So my hour graph shows individual points with spaces between them, but
they don't correspond very well to the data I'm seeing. My day graph
seems to reflect the magnitude of the data in the non-zeo cells.
I'd really appreciate an explanation of what's going on, and what the
best way is to clean this up.
Thanks,
</edg>
Ed Greenberg
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