At 01:09 PM 20-05-2001 -0400, Tom Lane wrote:
>>> 3. Reusing xact IDs would be nice, but there's an answer with a lot less
>>> impact on the system: go to 8-byte xact IDs.
>
>> +8 bytes in tuple header is not so tiny thing.
>
>Agreed, but the people who need 8-byte IDs are not running small
>installations. I think they'd sooner pay a little more in disk space
>than risk costs in performance or reliability.
An additional 4 (8?) bytes per tuple to increase the "mean time before
problem " 4 billion times sounds good to me.
Cheerio,
Link.