Galy Lee <lee.galy@oss.ntt.co.jp> writes:
> So I am thinking another way to perform vacuum. For example vacuum can
> be refined in a maintenance time frame like "VACUUM IN 6 HOURS", and
> then vacuum operation will be performed within the window. The delay
> time is adjusted internally to spread the disk I/O over the time frame.
And you will manage that how? The total amount of work to be done is
quite unpredictable.
regards, tom lane