Re: Why do pg_upgrade's test use the serial schedule?

On Mon, Nov 05, 2018 at 02:11:42PM -0800, Andres Freund wrote:
> Because just about everything else taking substantial time already
> disables it. pg_regress forks off a postmaster with -F, the tap tests do
> so for large portions via fsync=off in the config (c.f. PostgresNode.pm).

And in most cases people will forget to set up TEMP_CONFIG when setting
up a new environment.  If it is possible to reduce the I/O traffic when
running check-world by default and if we are able to make it faster with
a parallel schedule, my take is to do by default instead of expecting
the user to set up that all the time.  That's less to think about.

So I am +1 and +1 for Andres' suggestions on this thread.
--
Michael