Re: freezing tuples ( was: Why is vacuum_freeze_min_age 100m? )

Jeff Davis <pgsql@j-davis.com> writes:
> Let's say that we had a range like 50-100M, where if it's older than
> 100M, we freeze it, and if it's older than 50M we freeze it only if it's
> on a dirty page. We would still have forensic evidence, but we could
> make a range such that we avoid writing multiple times.

Yeah, making the limit "slushy" would doubtless save some writes, with
not a lot of downside.

> And people who don't care about forensic evidence can set it to 0-100M.

Everybody *thinks* they don't care about forensic evidence.  Until they
need it.
        regards, tom lane