Received: from malur.postgresql.org ([217.196.149.56])
	by arkaria.postgresql.org with esmtps  (TLS1.3) tls
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.96)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1wUxna-001ZWU-1V
	for pgsql-hackers@arkaria.postgresql.org;
	Thu, 04 Jun 2026 02:27:10 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.96)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1wUxnY-004QvK-39
	for pgsql-hackers@arkaria.postgresql.org;
	Thu, 04 Jun 2026 02:27:08 +0000
Received: from makus.postgresql.org ([2001:4800:3e1:1::229])
	by malur.postgresql.org with esmtps  (TLS1.3) tls
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.96)
	(envelope-from <bruce@momjian.us>)
	id 1wUxnY-004Qui-23
	for pgsql-hackers@lists.postgresql.org;
	Thu, 04 Jun 2026 02:27:08 +0000
Received: from momjian.us ([72.94.173.45])
	by makus.postgresql.org with esmtps  (TLS1.3) tls
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.98.2)
	(envelope-from <bruce@momjian.us>)
	id 1wUxnW-000000010Fi-3i1A
	for pgsql-hackers@lists.postgresql.org;
	Thu, 04 Jun 2026 02:27:07 +0000
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=momjian.us;
	s=2026010100; h=In-Reply-To:Content-Transfer-Encoding:Content-Type:
	MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To:
	Content-ID:Content-Description;
	bh=szIzgQ5DYgibiXhPwOm0htYNRqDM9w9gbh1BCOP7JAw=; b=xDVkCMMAdS5wizl7srCuCcUiOY
	r39VqJ0fanoInjbiWljG0NN8aifML7drG9uOP5NG7xE1R6O44BPf8ovLq2qS+zoOljMZDVes7yYOJ
	zlYzsvGG8HHiNbw5FQCD0FKU6ny7bnYCBwfORbtYg4xn4ceOZ88fpfM4z9SNc87UkOmPzjM5DJa42
	vL5ZxoYnbzR+W2xx2paNC6TXk1Snyr2KuI+o/ktNIjteCp0+m0BIxiYkbUggaci9oQyNQdI1R1q9C
	kK4aIMOVwzmB8ClJJkPz2jODa4JO6KCoQfmidwJvXrd2FS96XkRsNJceo2lfk7R+oVSCHg7r30Qhq
	s2BWglhw==;
Received: from bruce by momjian.us with local (Exim 4.98.2)
	(envelope-from <bruce@momjian.us>)
	id 1wUxnR-00000001LvN-3Ywh;
	Wed, 03 Jun 2026 22:27:01 -0400
Date: Wed, 3 Jun 2026 22:27:01 -0400
From: Bruce Momjian <bruce@momjian.us>
To: =?utf-8?B?5b2t5Yay?= <chong.peng@enmotech.com>
Cc: PostgreSQL-development <pgsql-hackers@lists.postgresql.org>
Subject: Re: First draft of PG 19 release notes
Message-ID: <aiDidYh1F0mHpB60@momjian.us>
References: <tencent_2F116D667A3BA165698CAEFE@qq.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <tencent_2F116D667A3BA165698CAEFE@qq.com>
List-Id: <pgsql-hackers.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-hackers@lists.postgresql.org>
List-Owner: <mailto:pgsql-hackers-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-hackers>
Archived-At: 
 <https://www.postgresql.org/message-id/aiDidYh1F0mHpB60%40momjian.us>
Precedence: bulk

On Thu, Jun  4, 2026 at 08:51:58AM +0800, 彭冲 wrote:
> Hi, Bruce
> 
> ```
> 
> <para>
> Previously <acronym>JIT</acronym> was enabled by default, and activated based on optimizer costs, but this costing has been determined to be unreliable.  This this change requires sites that are doing many
> large analytical queries to manually enable <acronym>JIT</acronym>.
> </para>
> 
> ```
> 
> 
> This this, double "this".

Thanks, will fix.

-- 
  Bruce Momjian  <bruce@momjian.us>        https://momjian.us
  EDB                                      https://enterprisedb.com

  Do not let urgent matters crowd out time for investment in the future.