On Wed, Jun 23, 2010 at 1:58 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> On Sun, Jun 20, 2010 at 4:13 PM, Scott Marlowe <scott.marlowe@gmail.com> wrote:
>>> The largest consequence I can see at the moment is that when I get a
>>> full vacuum (for preventing transaction-id wraparound) it would be
>>
>> I assume you mean the automatic database wide vacuum. I don't think
>> 8.4 and above need that anymore. I thnk 8.3 does that too, but I'm
>> not 100% sure.
>
> 8.4 (and 9.0) do still need to do vacuums to freeze tuples before
> transaction ID wraparound occurs. This is not to be confused with
> VACUUM FULL, which is something else altogether.
My point was that modern pgsql doesn't need db wide vacuum to prevent
wrap around anymore, but can vacuum individual relations to prevent
wraparound.