Re: Change default of jit to off

From: Bernd Helmle <mailings(at)oopsware(dot)de>
To: Jelte Fennema-Nio <postgres(at)jeltef(dot)nl>, Pierre Ducroquet <p(dot)psql(at)pinaraf(dot)info>
Cc: Álvaro Herrera <alvherre(at)kurilemu(dot)de>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andreas Karlsson <andreas(at)proxel(dot)se>, Anthonin Bonnefoy <anthonin(dot)bonnefoy(at)datadoghq(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Michael Banck <mbanck(at)gmx(dot)net>, Christoph Berg <myon(at)debian(dot)org>
Subject: Re: Change default of jit to off
Date: 2026-01-30 13:27:44
Message-ID: 674b350f5ae85b6b6fed36c9a1ecf5f12966abdb.camel@oopsware.de
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Am Freitag, dem 30.01.2026 um 12:28 +0100 schrieb Jelte Fennema-Nio:
> > People have also seen blog articles saying «JIT is bad, switch it
> > off» that are
> > right if you are in the wrong use cases for JIT. Which, to be fair,
> > is not
> > easy to figure out.
>
> +1 on disabling jit by default. At the FOSDEM Postgres developer
> meeting
> consensus was hugely in favor of changing the default. So attached is
> a
> trivial patch that does this.

+1, let's turn it off. I've seen many people hit by JIT and someone who
has the use case for it can easily turn it on again.

--
Thanks,
Bernd

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