Re: Idea for getting rid of VACUUM FREEZE on cold pages

Jan Wieck <JanWieck@Yahoo.com> writes:
> On 6/2/2010 3:10 PM, Alvaro Herrera wrote:
>> I'd prefer a setting that would tell the system to freeze all tuples
>> that fall within a safety range whenever any tuple in the page is frozen
>> -- weren't you working on a patch to do this?  (was it Jeff Davis?)

> I just see a lot of cost caused by this "safety range". I yet have to 
> see its real value, other than "feel good".

Jan, you don't know what you're talking about.  I have repeatedly had
cases where being able to look at xmin was critical to understanding
a bug.  I *will not* hold still for a solution that effectively reduces
min_freeze_age to zero.
        regards, tom lane