Re: PostgreSQL 12, JIT defaults

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: PostgreSQL 12, JIT defaults
Date: 2018-10-08 15:16:06
Message-ID: CAFj8pRA8Uo0+ATdt9NQBrFm4LLxmvqJpG-RqLxZQFO9rh4g5VQ@mail.gmail.com
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po 8. 10. 2018 v 17:10 odesílatel Andres Freund <andres(at)anarazel(dot)de> napsal:

>
>
> On October 8, 2018 8:03:56 AM PDT, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> >Andres Freund <andres(at)anarazel(dot)de> writes:
> >> Where is the jit=on coming from? Config from before it was turned
> >off?
> >
> >A look in guc.c shows that jit defaults to "on" whether or not JIT is
> >enabled at compile time.
>
> I thought Pavel was talking about 11 somehow...
>

I am sorry, It was not clear - I talked about master

>
> > This seems, at best, rather user-unfriendly.
> >And it's not like our conventions for other compile-option-affected
> >GUCs, eg the SSL ones.
>
> That was intentional, even though it perhaps should be better documented.
> That allows a distro to build and distribute pg without llvm enabled, but
> then have the JIT package with all the dependencies separately. The pg yum
> packages do so.
>

I don't like this solution - it is safe on production - but it can breaks
my development environment - or we need to change setup and make install
will not be enough.

Regards

Pavel

> Andres
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>

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