Re: questions about wraparound

On Mon, Mar 22, 2021 at 8:56 AM Luca Ferrari <fluca1978(at)gmail(dot)com> wrote:
> backend> select datname, age( datfrozenxid), current_setting(
> 1: datname = "template0" (typeid = 19, len = 64, typmod
> = -1, byval = f)
> 2: age = "2138438218" (typeid = 23, len = 4, typmod = -1, byval = t)
> 3: current_setting = "50000000" (typeid = 25, len =
> -1, typmod = -1, byval = f)
> ----
> 1: datname = "testdb" (typeid = 19, len = 64, typmod = -1, byval = f)
> 2: age = "2138438218" (typeid = 23, len = 4, typmod = -1, byval = t)
> 3: current_setting = "50000000" (typeid = 25, len =
> -1, typmod = -1, byval = f)

Another thing that comes into my mind as a doubt is: why are all
databases becoming old? I mean, I'm provoking activity _only_ on
testdb, therefore other database such as template1 are not doing
anything. Why an emergency autovacuum is not freezing such databases
before the wraparound happens?

Luca