From: | Stephen Frost <sfrost(at)snowman(dot)net> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Christoph Berg <myon(at)debian(dot)org>, Andres Freund <andres(at)anarazel(dot)de>, Darafei "Komяpa" Praliaskouski <me(at)komzpa(dot)net>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: JIT breaks PostGIS |
Date: | 2018-07-23 01:03:57 |
Message-ID: | 20180723010356.GD27724@tamriel.snowman.net |
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Lists: | pgsql-hackers |
Greetings,
* Tom Lane (tgl(at)sss(dot)pgh(dot)pa(dot)us) wrote:
> Christoph Berg <myon(at)debian(dot)org> writes:
> > The question will be coming up eventually, though, and I think the
> > options on the packaging side are:
>
> > 1) Disable jit completely
> > 2) Compile --with-llvm, but disable jit in the config by default
> > 3) Compile --with-llvm, but disable jit for older llvm versions
> > 4) Enable jit everywhere where llvm >= 3.9 is available
>
> > Option 4 is what the Debian packages implement now, but it might make
> > sense to go to 2 or 3 for PG11 (only).
>
> Well, right now JIT is certainly beta-quality code, so you ought
> to expect bugs. We have an open item at
> https://wiki.postgresql.org/wiki/PostgreSQL_11_Open_Items
> to decide whether to ship v11 with JIT enabled by default or not,
> but I don't expect that decision will be taken until much closer
> to release. Until then, I think you should be doing (4) so that
> we can gather data to inform the eventual decision.
+1.
Thanks!
Stephen
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