RE: Disable WAL logging to speed up data loading

From: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
> At Thu, 19 Nov 2020 11:04:17 -0500, Stephen Frost <sfrost@snowman.net>
> > * Laurenz Albe (laurenz.albe@cybertec.at) wrote:
> > > I missed that this is only a warning when I looked at it before.
> > > Yes, it should be a fatal error.
> >
> > Yeah, the more that I think about it, the more that I tend to agree with
> > this.  Does anyone want to argue against changing this into a FATAL..?
>
> I don't come up with a use case where someone needs to set
> wal_level=minimal for archive recovery. So +1 to change it to FATAL.

Thank you all.  I'd like to give Osumi-san an opportunity to write a patch and showing the evidence of successful test
ifyou don't mind.  He is very young and newbie to Postgres, so even a small contribution would encourage him to make
furthercontributions. 


Regards
Takayuki Tsunakawa