Andreas Pflug <pgadmin(at)pse-consulting(dot)de> writes:
> Tom Lane wrote:
>> Why is that a useful approach? You might as well shut down the
>> postmaster and do a cold filesystem backup,
>>
> We're talking about *hot* backup, aren't we?
Exactly. The approach you're sketching can't work for hot backup,
because it effectively assumes that the database won't be changing.
regards, tom lane