[rrd-users] Re: Unexpected peak in the data?

Andreas Maus andreas_maus at bigfoot.com
Thu Aug 24 20:31:28 MEST 2000

Clifton Royston wrote:
> On Thu, Aug 24, 2000 at 07:30:35PM +0200, Andreas Maus wrote:
> >
> > Hello everbody!
> >
> > This morning I found an unexpected high peak in the database wich
> > stores the outgoing traffic of my interface. It says that there was
> > an output with about 40 MBytes per second on the interface eth0.
> > But I know this couldn't happen, because this Ethernet card is only an
> > 10Mbps. How can this happen and how can I avoid this?
> It depends on how you're reading it.  If you're reading it via SNMP,
> counter resets being interpreted as counter wraps can cause this.
> To avoid it, set rrd_max to 10M.  To clean up your existing data so you
> can preserve it, look at killspike.pl in the contrib subdirectory
> of rrdtool.
>   -- Clifton, about to do the same for some of *his* spiked data
I read it directly from /proc/net/dev (like SNMP do ???) so a counter
reset may be possible.
I think setting the rrd_max will avoid this.
Thanks, Andreas.

|           email: andreas_maus at bigfoot.com   |
|       http://www.bigfoot.com/~andreas_maus/ |

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