sum of items in a graph

[fege]

i have the Input bandwith for two machines X and Y.
is it possible to create a single graph with the sum of INbandwith.X + INbandwith.Y?

[loalvares]

Its perfectly possible

i have the Input bandwith for two machines X and Y.
is it possible to create a single graph with the sum of INbandwith.X + INbandwith.Y?

If you create a diferent item, using the sum with this itens at Formula field. For example:

last("system.cpu.util[,system,avg1]")+last("system.cpu.util[,user,avg1]")

So you only have to add this iten at your graph

[fege]

i use snmp in my items in order to know the bandwith, can i use the formula field with snmp on two different machines?
i tried to write a new item with {proxy2:ifInOctects.1.last(0)}+proxy1:ifInOctects. 1.last(0)} in the field expression, but it doesn't work

[loalvares]

Sorry.

I don`t know. I will try a solution and post a result here.

[vlturner]

Use an aggregate.

Instead of

{proxy2:ifInOctects.1.last(0)}+proxy1:ifInOctects. 1.last(0)}

do

grpsum["{HOSTGROUP}","ifInOctets1","last","0"]

I am using this to read the the last value and saving it as a delta per sec.

This way I keep the "AS IS" value for ifInOctet1 for historical analysis, and use the aggregate to create the key "ifInOctet1 per sec"