Carlos Henrique Reimer <carlosreimer(at)yahoo(dot)com(dot)br> writes:
> I would like to know some suggestions how to discover why is it swapping?
Zero swap-in rate and swap-out rates in the single digits do not
constitute a swapping problem. It's reasonably likely that that
traffic isn't even coming from Postgres, but something else.
I'd say ignore it.
regards, tom lane