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

Clifton Royston cliftonr at lava.net
Thu Aug 24 20:11:50 MEST 2000

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

 Clifton Royston  --  LavaNet Systems Architect --  cliftonr at lava.net
      The named which can be named is not the Eternal named.

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