Message-ID: <ebfe51f8-ac31-4714-97ab-2dcd70bffb16@vondra.me>
Date: Mon, 13 Apr 2026 00:27:33 +0200
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Subject: Re: Change default of jit to off
From: Tomas Vondra <tomas@vondra.me>
To: Andrew Dunstan <andrew@dunslane.net>,
 Thomas Munro <thomas.munro@gmail.com>
Cc: Andres Freund <andres@anarazel.de>, Pierre Ducroquet
 <p.psql@pinaraf.info>, Tom Lane <tgl@sss.pgh.pa.us>,
 Jelte Fennema-Nio <postgres@jeltef.nl>,
 Greg Sabino Mullane <htamfids@gmail.com>,
 Adrien Nayrat <adrien.nayrat@anayrat.info>, Christoph Berg
 <myon@debian.org>, Euler Taveira <euler@eulerto.com>,
 =?UTF-8?Q?=C3=81lvaro_Herrera?= <alvherre@kurilemu.de>,
 PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
 Andreas Karlsson <andreas@proxel.se>,
 Anthonin Bonnefoy <anthonin.bonnefoy@datadoghq.com>,
 pgsql-hackers <pgsql-hackers@postgresql.org>, Michael Banck <mbanck@gmx.net>
References: <aYHN-fxswaIgfI-B@msg.df7cb.de>
 <49490d8d-e8b9-497b-9a58-712daadb9ca9@anayrat.info>
 <CAKAnmmKZ_Yg2CEt9Wa-QZWZ7UePfWB9qnk=qDiXZcqNS5MdrGQ@mail.gmail.com>
 <zavalseit5sbjf5gx352ioobtlqtycrs5yczynwzckacdwqh23@mjuvibp2z44t>
 <CAGECzQQdO5OGnxe7bpN1usp+ku+tLBW=SwgLbrULVcFAjH5_yA@mail.gmail.com>
 <5b5d04c3-e34e-4ae9-8b39-12b52e63154a@vondra.me>
 <1629115.1774023867@sss.pgh.pa.us>
 <gPNlX1QTDtJW2Cyi3fA2OGFvoIybkehUYKCHCe2r3Ujm_0y9V1T13CPI2MA6RyPhLi8zNwNczq1DNrbh1l47eVn6tOwz-qzG2yXw_XtptTQ=@pinaraf.info>
 <vhiu76rnwynmtmm3jbkettfelj5l2jtnbkwm7szpiyjbyrmd44@3gdapm3mnu3m>
 <d8bb1295-6392-4cba-917d-de7da2b8c8bd@vondra.me>
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 <0be4f0df-4a17-44b2-9445-fcfbd234d871@dunslane.net>
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On 4/2/26 21:46, Tomas Vondra wrote:
> 
> 
> On 4/2/26 15:10, Andrew Dunstan wrote:
>>
>> On 2026-04-02 Th 8:50 AM, Thomas Munro wrote:
>>> On Fri, Apr 3, 2026 at 12:52 AM Tomas Vondra <tomas@vondra.me> wrote:
>>>> Pushed, after rewording the commit message a little bit, and removing
>>>> the sentence in the docs saying
>>>>
>>>>      (before PostgreSQL 19 the default was on)
>>> How can we keep it enabled in the build farm?
>>>
>>>
>>
>> No easy way to do it globally - I guess we could default it to on in the
>> next client release. Individual owners can enable it in their buildfarm
>> configs, in the extra_config section.
>>
> 
> That's a good idea. Maybe we should ping the buildfarm owners (those
> that are already running --with-llvm) to add jit=on.
> 
> I'll do that on my two clang animals dikkop/jay, and maybe on some of
> the gcc ones too. But I'll wait a bit, I don't want to upset them right
> before feature freeze.
> 

FWIW I've now done this on my 5 animals - dikkop, turaco, widowbird, jay
and hippopotamus. None of them was even building with LLVM before. On
the last two it was a bit of a struggle, due to having old gcc and LLVM.

regards

-- 
Tomas Vondra