Hi Dmitry,
ifHCInOctets is a counter metric, which can reset to 0 at arbitrary times
(like when your networking device restarts), so you cannot rely on its
latest value to show you the total cumulative count of bytes over "all
time". So with counters, you almost never want to look at their absolute
value, but at their rate of increase (with resets handled by functions such
as rate() or increase()).
For example, you could do:
increase(ifHCInOctets{ifDescr="ether1",ifIndex="3",ifName="ether1",instance="10.10.4.102",job="snmp"}[7d])
/ 1e6
...to calculate the total MB (in base 10) over 7d. Set the "7d" to a time
range which is sufficient to mean "all time" for you, and you should get
the increase you're looking for.
I don't think you will need the "sum(...)" at all if you are selecting
only one time series to begin with (looks like exactly one interface on one
node). sum(...) would be for summing the values of multiple time series at
one point in time.
Regards,
Julius
On Sun, May 10, 2020 at 2:11 PM Dmitry <[email protected]> wrote:
> Hi guys!
> I am new to prometheus and having some difficulties with it and have
> already become a little confused.
> I am trying to calculate the amount of incoming traffic for an interface
> for all the time in megabytes, which is displayed in octets.
> Please correct, what am I doing wrong?
> P.S. sorry for my English.
>
> ifHCInOctets{ifDescr="ether1",ifIndex="3",ifName="ether1",instance="10.10.4.102",job="snmp"}
> value=1433610926 this is how query looks in prom.
>
> sum(ifHCInOctets{ifDescr="ether1",ifName="ether1",instance="10.10.4.102",job="snmp"})/1000000
> and i'm trying to calculate sum of traffic.
> As a result, my value=1433.610926
>
>
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--
Julius Volz
PromLabs - promlabs.com
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