[rrd-users] Trouble graphing small values

[Lazy]

Hi all,

I'm getting values around 15m(on graphs) when rrd contains small
positive values.

the graphing command "rrdtool graph load.png --imgformat PNG -s -1000
DEF:a=load.rrd:load:AVERAGE AREA:a\#ff0000"

the load.rrd dump
<!-- Round Robin Database Dump --><rrd> <version> 0003 </version>
       <step> 60 </step> <!-- Seconds -->
       <lastupdate> 1202509716 </lastupdate> <!-- 2008-02-08 23:28:36 CET -->

       <ds>
               <name> load </name>
               <type> GAUGE </type>
               <minimal_heartbeat> 120 </minimal_heartbeat>
               <min> 0.0000000000e+00 </min>
               <max> 2.0000000000e+02 </max>

               <!-- PDP Status -->
               <last_ds> UNKN </last_ds>
               <value> 5.8746974400e-01 </value>
               <unknown_sec> 0 </unknown_sec>
       </ds>

...
<!-- Round Robin Archives -->   <rra>
               <cf> AVERAGE </cf>
               <pdp_per_row> 1 </pdp_per_row> <!-- 60 seconds -->

               <params>
               <xff> 5.0000000000e-01 </xff>
               </params>
               <cdp_prep>
                       <ds>
                       <primary_value> 1.6000000000e-02 </primary_value>
                       <secondary_value> 1.2496628108e-02 </secondary_value>
                       <value> NaN </value>
                       <unknown_datapoints> 0 </unknown_datapoints>
...
<!-- 2008-02-06 23:29:00 CET / 1202336940 --> <row><v>
1.5000000000e-02 </v><v>...</row
>
...
                       <!-- 2008-02-08 23:25:00 CET / 1202509500 -->
<row><v> 1.5608202650e-02 </v>...</row
>
                       <!-- 2008-02-08 23:26:00 CET / 1202509560 -->
<row><v> 1.5000000000e-02 </v>...</row
>

load at 23:25 is very small, but on graph it shows 15m.

Is this rra correct? Any ideas what I can be doing wrong ?

Thanks in advance for any advice.

--
Lazy