Feedback-ID: i0fe9450f:Fastmail
Date: Thu, 5 Mar 2026 07:41:29 +0900
From: Michael Paquier <michael@paquier.xyz>
To: Jacob Champion <jacob.champion@enterprisedb.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>,
	Mark Wong <markwkm@gmail.com>
Subject: Re: pgsql: Change default value of default_toast_compression to
 "lz4", when
Message-ID: <aai1GYY46UReraab@paquier.xyz>
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On Wed, Mar 04, 2026 at 09:01:06AM -0800, Jacob Champion wrote:
> I know there's no "good time" to change a configuration default, but
> the timing now is especially unfortunate, because Mark maintains many
> of those failing animals and he is traveling this week. Any chance we
> can delay this patch a bit to coordinate, and keep the buildfarm
> green?

There will never be a perfect time for such a change.  And after that
comes the fact I am out for most of the end of the dev cycle (spring
vacations and the end of the fiscal year here), so if we were to do
again the same thing in two weeks, I would not be able to follow up.

For now, I am collecting data about all the buildfarm members showing
in red, and I'll send direct notices to each owner through the day to
reduce the blast, in the shape of one email for each owner and for all
his/her hosts failing.  I am wondering if this is going to display
bugs with LZ4, actually, the extend of the red-ness of the buildfarm
shows that we did not test it much on some niche places.  I have
enabled it on my machines for a few years now, but it's clearly not a
popular choice.
--
Michael

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