Help with syntax

[raikk0]

Hi guys, i need a little help with this trigger (syntax)

I want to to calculate the difference (percentual) of 2 states (actual and previous). if that difference is above 20, fire the trigger

i have this: {XP1:ifInOctets.abschange((last("XP1:ifInOctets")-prev("XP1:ifInOctets"))*100)/prev("XP1:ifInOctets")}>20

meaning: {<host>:<key>.func(formula)}>20

formula = ((a-b) *100) / b

where:

a= sample
b= previous sample

what is wrong about the trigger. please illuminate me

thx in advance!

[raikk0]

kinda solved...

i create a trigger with the formula

{XP1:ifInOctets.abschange(0)}/{XP1:ifInOctets.prev(0)}>0.8

meaning, [absolute difference betwen last and previous sample] / [previous sample] > 0.8

this formula gives me the percentual bandwidth variation on a interface, and alerts me if that variation is above 80% (rise or fall)

but i still want to create this as a ITEM !!!

cheers anyway...zabbix rules !