On Fri, Oct 2, 2015 at 8:14 PM, Masahiko Sawada <sawada.mshk@gmail.com> wrote:
>> +#define Anum_pg_class_relallfrozen 12
>> Why is pg_class.relallfrozen necessary? ISTM that there is no user of it now.
>
> The relallfrozen would be useful for user to estimate time to vacuum
> freeze or anti-wrapping vacuum before being done them actually.
> (Also this value is used on regression test.)
> But this information is not used on planning like relallvisible, so it
> would be good to move this information to another system view like
> pg_stat_*_tables.
Or make pgstattuple and pgstattuple_approx report even the number
of frozen tuples?
Regards,
--
Fujii Masao
