[rrd-users] Re: RRDTool and counter rollover/resets.

[Tobias Oetiker]

Yesterday James Kilton wrote:

> Hi,
>
> I'm monitoring DNS query statistics via an SNMP counter and
> storing the data in RRDTool.  Whenever I restart the BIND
> service, the counters reset to 0.  This caused RRDTool to think
> that the counter incremented ~4 billion times, causing a huge
> spike on the graph.

> Is there a way to have RRDTool take things like this into account
> to eliminate such spikes?

James,

use DERIVE and a minimum value setting of 0.

also, if your counter actually would wrap at 2^32-1, then you can
use COUNTER and a realistic max setting to let rrdtool decide if it
was a wrap or a reset ...

cheers
tobi
>
> Thanks,
> James
>
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