[tor-relays] Traffic pattern on Tor relay

[tor-admin]

Hi,

I am monitoring the network interface of my tor server with nload. From time 
to time nload shows strange traffic patterns: http://i.imgur.com/0Wr9h.png

The graph is updated every second so one hash mark corresponds to one second. 
The most recent traffic value is on the right side. The graph shows that the 
traffic oscillates with a period of about 14 seconds and the traffic doubles 
in the peaks.

Does anyone has an explanation of this pattern?

Regards,

Torland
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