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 1hVugv-00087o-F6 for pgsql-performance@arkaria.postgresql.org; Wed, 29 May 2019 09:16:13 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1hVugu-0008QQ-Av for pgsql-performance@arkaria.postgresql.org; Wed, 29 May 2019 09:16:12 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVugu-0008QJ-1p for pgsql-performance@lists.postgresql.org; Wed, 29 May 2019 09:16:12 +0000 Received: from post.visena.com ([46.226.10.50]) by magus.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hVugr-00066a-KF for pgsql-performance@lists.postgresql.org; Wed, 29 May 2019 09:16:11 +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=o3/GT09xg0nm9gu+T21k+WP3WmN/6ipyqGKK4b/TkEc=; b=VAsRHJxh3Orm6rFuQwdG6Iq3e/5WNCfNP98IVN28XVcGBjngxrzB0tt4L/qA2Hc0JycxeEHsXkoqwuJyQZoWv36HZu6YdgoE9JMkk2pDKAmfPArzz9L/R2WkQw3e8+cnSLxFglDasEYfQ6nyJ8E5Rrd74aBRDQSvMt1spCLt7PY=; 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 1hVugo-0005vV-MS; Wed, 29 May 2019 11:16:09 +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 1hVugo-0007qT-Ke; Wed, 29 May 2019 11:16:06 +0200 Date: Wed, 29 May 2019 11:16:06 +0200 (CEST) From: Andreas Joseph Krogh To: Tobias Gierke Cc: pgsql-performance@lists.postgresql.org Message-ID: In-Reply-To: <463322dc-8b64-3595-7f48-3c513d81bd0a@code-sourcery.de> Subject: Re: Sv: JIT in PostgreSQL 12 ? MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_165_877438700.1559121366496" X-Mailer: Visena Mail 2.2.76 X-Spam-Score: 0.3 X-Spam-Report: SpamAssasin (score=0.3, required 5.0 ALL_TRUSTED=-1,HTML_IMAGE_ONLY_24=1.282,HTML_MESSAGE=0.001) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk ------=_Part_165_877438700.1559121366496 Content-Type: multipart/related; boundary="----=_Part_166_1328516230.1559121366496" ------=_Part_166_1328516230.1559121366496 Content-Type: multipart/alternative; boundary="----=_Part_167_524014011.1559121366529" ------=_Part_167_524014011.1559121366529 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable P=C3=A5 onsdag 29. mai 2019 kl. 11:13:10, skrev Tobias Gierke < tobias.gierke@code-sourcery.de >: Hi= , P=C3=A5=20 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.=20 Hm, that's a bummer. So I guess we'll also have to make sure JIT is turned = off=20 when upgrading. That's what we'll do, unfortunately:-( -- Andreas Joseph Krogh CTO / Partne= r -=20 Visena AS Mobile: +47 909 56 963 andreas@visena.com =20 www.visena.com ------=_Part_167_524014011.1559121366529 Content-Type: text/html;charset=UTF-8 Content-Transfer-Encoding: quoted-printable
P=C3=A5 onsdag 29. mai 2019 kl. 11:13:10, skrev Tobias Gierke <tobias.gierke@code-sourcery.d= e>:
Hi,
P=C3=A5 onsdag 29. mai 2019 kl. 10:02:50, skrev Tobias Gierke <tobi= as.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 ?
=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.

Hm, that's a bummer. So I guess we'll also have to make sure JIT is turn= ed off when upgrading.

That's what we'll do, unfortunately:-(
=C2=A0
">
--
Andrea= s Joseph Krogh
CTO / Partner<= /span> - Visena AS
Mobile: +47 90= 9 56 963
=3D""
=C2=A0
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