Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVuG6-0006R0-0Z for pgsql-performance@arkaria.postgresql.org; Wed, 29 May 2019 08:48:30 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1hVuG4-0005Lm-LQ for pgsql-performance@arkaria.postgresql.org; Wed, 29 May 2019 08:48:28 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVuG4-0005Lc-5F for pgsql-performance@lists.postgresql.org; Wed, 29 May 2019 08:48:28 +0000 Received: from post.visena.com ([46.226.10.50]) by makus.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVuG1-0002vP-7d for pgsql-performance@postgresql.org; Wed, 29 May 2019 08:48:26 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=visena.com; s=20141101.wh; h=Content-Type:MIME-Version:Subject:In-Reply-To:Message-ID:Cc:To:From:Date; bh=96EsEUHGgfxE6ZHaxFn3UhLENCaXmOBBsBW5iR6h3kI=; b=D9ebTAN4HvFyXTMZa6nmiay7FGZAXtNkKcCDjon2gxS41VXUc5nhGi25o+IHSmXu432REfQptw6c6bYR1SYKrvzJJXHlidXKCw61NxQoOFmUstsZcSyoSeZnYsKkX7EpTdOiSP0eKrjHXwPNASQmM1+d5WmBsRtBoL3qPCi5zik=; Received: from [10.0.1.10] (helo=tc7-visena.wh.internal.visena.com) by post.visena.com with esmtp (Exim 4.82) (envelope-from ) id 1hVuFw-00082k-1h; Wed, 29 May 2019 10:48:22 +0200 Received: from localhost ([127.0.0.1] helo=tc7-visena.wh.internal.visena.com) by tc7-visena.wh.internal.visena.com with esmtp (Exim 4.90_1) (envelope-from ) id 1hVuFv-0006id-WA; Wed, 29 May 2019 10:48:20 +0200 Date: Wed, 29 May 2019 10:48:19 +0200 (CEST) From: Andreas Joseph Krogh To: Tobias Gierke Cc: PostgreSQL mailing lists Message-ID: In-Reply-To: Subject: Sv: JIT in PostgreSQL 12 ? MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_145_1212557644.1559119699869" X-Mailer: Visena Mail 2.2.76 X-Spam-Score: 0.0 X-Spam-Report: SpamAssasin (score=0.0, required 5.0 ALL_TRUSTED=-1,HTML_IMAGE_ONLY_20=0.7,HTML_MESSAGE=0.001,HTML_SHORT_LINK_IMG_3=0.328) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk ------=_Part_145_1212557644.1559119699869 Content-Type: multipart/related; boundary="----=_Part_146_1440204748.1559119699869" ------=_Part_146_1440204748.1559119699869 Content-Type: multipart/alternative; boundary="----=_Part_147_1491371903.1559119699893" ------=_Part_147_1491371903.1559119699893 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable P=C3=A5 onsdag 29. mai 2019 kl. 10:02:50, skrev Tobias Gierke < 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 experienc= e=20 with PG-12 and JIT: Execution-time is still way worse then JIT=3Doff for yo= ur=20 queries so we'll turn JIT=3Doff until we can mesure performance-gain. -- An= dreas=20 Joseph Krogh CTO / Partner - Visena AS Mobile: +47 909 56 963 andreas@visen= a.com www.visena.com =20 ------=_Part_147_1491371903.1559119699893 Content-Type: text/html;charset=UTF-8 Content-Transfer-Encoding: quoted-printable
P=C3=A5 onsdag 29. mai 2019 kl. 10:02:50, skrev Tobias Gierke <tobias.gierke@code-sourcery.d= e>:
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 ?
=C2=A0
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=3Doff for your queries = so we'll turn JIT=3Doff until we can mesure performance-gain.
=C2=A0
">
--
Andrea= s Joseph Krogh
CTO / Partner<= /span> - Visena AS
Mobile: +47 90= 9 56 963
=3D""
=C2=A0
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