From: Tobias Gierke <tobias.gierke@code-sourcery.de>
To: pgsql-performance@lists.postgresql.org
Subject: Re: Sv: JIT in PostgreSQL 12 ?
Date: Wed, 29 May 2019 11:13:10 +0200
Message-ID: <463322dc-8b64-3595-7f48-3c513d81bd0a@code-sourcery.de> (raw)
In-Reply-To: <VisenaEmail.21.c9f137cb2e7b98d4.16b02c4aacc@tc7-visena>
References: <VisenaEmail.21.c9f137cb2e7b98d4.16b02c4aacc@tc7-visena>
Hi,
> På onsdag 29. mai 2019 kl. 10:02:50, skrev Tobias Gierke
> <tobias.gierke@code-sourcery.de <mailto:tobias.gierke@code-sourcery.de>>:
>
> Hi,
>
> Browsing the PostgreSQL 12 release notes I noticed that JIT is now
> enabled by default. Having not followed PostgreSQL development
> closely -
> does this mean that compilation results are now getting cached and
> compilation is no longer executed separately for each worker
> thread in a
> parallel query ?
>
> I don't know, but just want to chime in with my experience with PG-12
> and JIT: Execution-time is still way worse then JIT=off for your
> queries so we'll turn JIT=off until we can mesure performance-gain.
Hm, that's a bummer. So I guess we'll also have to make sure JIT is
turned off when upgrading.
Thanks,
Tobias
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To: pgsql-performance@postgresql.org
Cc: tobias.gierke@code-sourcery.de, pgsql-performance@lists.postgresql.org
Subject: Re: Sv: JIT in PostgreSQL 12 ?
In-Reply-To: <463322dc-8b64-3595-7f48-3c513d81bd0a@code-sourcery.de>
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