Jan Wieck wrote:
>
> _Vacuum page delay_:
>
> Tom Lane's napping during vacuums with another tuning option. I
> replaced the usleep() call with a PG_DELAY(msec) macro in miscadmin.h,
> which does use select(2) instead. That should address the possible
> portability problems.
What about skipping the delay if there are no outstanding disk
operations? Then vacuum would get the full disk bandwidth if the system
is idle.
-- Manfred