RARE user and assistance email list

[Simon Leinen <>]

mc36  writes:
> and even more fun in the attached picture, the iperf 1day test ended
> imho in 2 hours ago so grafana started showing us 70tbps peaks,
> telling me that tofino can exceed it's datasheet 6tbps limit... :))))

Presumably an arithmetic error involving counter roll-overs or some
other unexpected effect of limited precision.  Might be worth a look.
Such measurement artifacts can be very annoying, e.g. if they cause
false alarms in a monitoring system.

Is this using SNMP counters natively? (Because those have a pretty
well-defined semantic.)

Or does Grafana get its data from Prometheus? Prometheus decided to only
use IEEE 754 double-precision floats, which allow for 53 bits of integer
precision (which presumably gets worse and worse over time as the
exponent grows...).
-- 
Simon.