From: pgsql-hackers-owner@postgresql.org
> I used to think of that this kind of features should be enabled by default,
> because when I was working at the previous company, I had only few features
> to understand what is happening inside PostgreSQL by observing production
> databases. I needed those features enabled in the production databases when
> I was called.
>
> However, now I have another opinion. When we release the next major release
> saying 10.0 with the wait monitoring, many people will start their benchmark
> test with a configuration with *the default values*, and if they see some
> performance decrease, for example around 10%, they will be talking about
> it as the performance decrease in PostgreSQL 10.0. It means PostgreSQL will
> be facing difficult reputation.
>
> So, I agree with the features should be disabled by default for a while.
I understand your feeling well. This is a difficult decision. Let's hope for trivial overhead.
Regards
Takayuki Tsunakawa
