noob: graph values are off by a factor of 300, can't see why

[Dinger]

This is my first custom graph; everything I've used up-till now have been templates.

I am trying to graph an arbitrary OID with Cacti (0.8.7b, rrdtool 1.2.27). I have the SNMP data being captured, and graphed, but the values do not appear to be correct (they kinda of look to be a factor off, but my Unit Exponent Value on the Graph Template is 0).

I am gathering the value of the OID via a simple cron script also (my original method of graphing ).

Here is the graph:

For the same time period, the values were:
Fri May 16 13:10:01 EDT 2008
Counter32: 8575703
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Fri May 16 13:15:02 EDT 2008
Counter32: 8575718
-----
Fri May 16 13:20:01 EDT 2008
Counter32: 8578040
-----
Fri May 16 13:25:01 EDT 2008
Counter32: 8578498

Notice how between 13:15 and 13:20 the value changed by 2322. So I figured Cacti would graph a value of 2322, but instead it shows about 8. So at first I thought Cacti was grabbing something wrong, but a rrdtool info of the rrd shows the data gathered is the same as my script.

Can someone whack me with a cluestick please? Should I post my .rrd file?

[Dinger]

It looks like all the values are off by a factor of 300; based on my other script, the highest change in value was 37,374, but Cacti reports the highest was 124.49 (37374 / 124.49 = 300)

What could I have wrong to make my graphs off by a factor of 300?

[gandalf]

COUNTER data sources are reporting rates as "per second". When running standard polling interval of 300 seconds, rrdtool will divide COUNTER values by 300 to get "per second" values.
Reinhard