This is a feature of rrdtool. The rrd is built with a specific time spacing for the values, which is usually 5 minutes in xymon. If your rrd updates are not made *exactly* at the time expected, the values are adjusted to fit. So, if your rrd is created at, say, 10:05:23, you'll only get the exact values if the updates are timestamped 10:10:23, 10:15:23, 10:20:23, etc. <div>
<br></div><div>Ralph Mitchell<br><br></div><div><br><div class="gmail_quote">2011/4/1 Eenkhoorn, (Klaas) <span dir="ltr"><<a href="mailto:klaas.eenkhoorn@vtspn.nl">klaas.eenkhoorn@vtspn.nl</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>
<div><span><font size="2" face="Arial">Dear
All,</font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial">Can someone explain
why, if i make a monitor with values like:</font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial">A :
10</font></span></div>
<div><span><font size="2" face="Arial">B :
20</font></span></div>
<div><span><font size="2" face="Arial">C :
15</font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial">The rrd graph of
this test records as the 'curr' value for example:</font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial">A : 10.2
(curr)</font></span></div>
<div><span><font size="2" face="Arial">B: 17.5
(curr)</font></span></div>
<div><span><font size="2" face="Arial">C: 14.2
(curr)</font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial">Does RRD generate a
kind of expected average ?</font></span></div>
<div><span><font size="2" face="Arial">I would expect the
'curr' values to be the exact value of the last report of the
test.</font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial">Graph
defenition:</font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div><span><font size="2" face="Arial">[statistieken]<br>
FNPATTERN statistieken,(.*).rrd<br>
TITLE Aantal gebruikers per
regio<br> YAXIS Aantal
gebruikers<br>
DEF:p@RRDIDX@=@RRDFN@:lambda:AVERAGE<br>
LINE2:p@RRDIDX@#@COLOR@:@RRDPARAM@<br>
GPRINT:p@RRDIDX@:LAST: \: %5.1lf
(cur)<br> GPRINT:p@RRDIDX@:MAX: \:
%5.1lf (max)<br> GPRINT:p@RRDIDX@:MIN:
\: %5.1lf (min)<br>
GPRINT:p@RRDIDX@:AVERAGE: \: %5.1lf (avg)\n<br></font></span></div>
<div><span><font size="2" face="Arial"></font></span> </div>
<div> </div>
<div align="left">
<p style="margin:0cm 0cm 0pt" class="MsoNormal" align="left"><b><span style="font-family:Arial;color:blue;font-size:10pt">Met vriendelijke
groet,</span><span style="color:blue"></span></b></p>
<p style="margin:0cm 0cm 0pt" class="MsoNormal"> </p>
<p style="margin:0cm 0cm 0pt" class="MsoNormal"><b><span style="font-family:Arial;color:blue;font-size:10pt">Klaas D.
Eenkhoorn</span></b></p>
<p style="margin:0cm 0cm 0pt" class="MsoNormal"><b><span style="font-family:Arial;color:blue;font-size:10pt">Senior Beheerder
UNIX</span></b></p>
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038-4976326</span></p>
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