[tor-relays] stats

hello, i'm running an exit node from 2 or 3 month, in UA, on a vps, xeon 2650 2Ghz, 128mb RAM, debian 6 tor v0.2.3.25-1

on atlas there is some stat on those days it's seem to be at max 100Kb/s

//atlas.torproject.org/#details/62C3FB37C44555E55A62BBD7CDDD97FE4894F317

but on arm or with iftop i'm beetween 300 and 900Kb/s download and the same in upload

my load average is 4.74, 2.97, 2.98 there is just tor on this server

this append form the beguining,

there is a problem? who is right? can you help me to verify if my node is fine configured?

thanks

PS: sorry for my english is not my first language