Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> We don't call pollsys anywhere. Something in Solaris must be doing it
> under the hood.
pg_usleep calls select(), and some googling indicates that select() is
implemented as pollsys() on recent Solaris versions. So Josh's
assumption that those are delay calls seems plausible. But it shouldn't
be sleeping after each page with normal cost_delay parameters, should it?
regards, tom lane