On Wed, Jul 25, 2018 at 11:14 AM, Thomas Güttler
<guettliml(at)thomas-guettler(dot)de> wrote:
>
> AFAIK powa is based on pg_stat_statements not on statistical samples.
> But maye I am wrong.
Indeed, it's based on pg_stat_statements, but other extensions are
supported too. Since pg_stat_statements already provides cumulated
counters, there's no need to do sampling. But if you're interested in
wait events information for instance, it supports (in development
version) pg_wait_sampling extension, which does sampling to provide
efficient and informative informations.