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 <pgsql-bugs-owner+archive@lists.postgresql.org>)
	id 1hUBwR-0002Wg-Kc
	for pgsql-bugs@arkaria.postgresql.org; Fri, 24 May 2019 15:17:07 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.89)
	(envelope-from <pgsql-bugs-owner+archive@lists.postgresql.org>)
	id 1hUBwQ-000608-5B
	for pgsql-bugs@arkaria.postgresql.org; Fri, 24 May 2019 15:17:06 +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 <tgl@sss.pgh.pa.us>)
	id 1hUBwP-000600-Qc
	for pgsql-bugs@lists.postgresql.org; Fri, 24 May 2019 15:17:05 +0000
Received: from sss.pgh.pa.us ([66.207.139.130])
	by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256)
	(Exim 4.89)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1hUBwN-0000VF-Hs
	for pgsql-bugs@lists.postgresql.org; Fri, 24 May 2019 15:17:04 +0000
Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1])
	by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id x4OFGrLE015859;
	Fri, 24 May 2019 11:16:53 -0400
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Fabien COELHO <coelho@cri.ensmp.fr>
cc: koizumistr@minos.ocn.ne.jp,
        PostgreSQL Bugs <pgsql-bugs@lists.postgresql.org>
Subject: Re: BUG #15819: wrong expression in document of pgbench
In-reply-to: <alpine.DEB.2.21.1905241631310.29379@lancre>
References: <15819-e6191bef1f7334c0@postgresql.org>
 <alpine.DEB.2.21.1905241631310.29379@lancre>
Comments: In-reply-to Fabien COELHO <coelho@cri.ensmp.fr>
	message dated "Fri, 24 May 2019 16:33:43 +0200"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <15857.1558711013.1@sss.pgh.pa.us>
Date: Fri, 24 May 2019 11:16:53 -0400
Message-ID: <15858.1558711013@sss.pgh.pa.us>
List-Id: <pgsql-bugs.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-bugs@lists.postgresql.org>
List-Owner: <mailto:pgsql-bugs-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-bugs>
Precedence: bulk

Fabien COELHO <coelho@cri.ensmp.fr> writes:
>> In example of random_zipfian,  the explanation is "which itself(2) is
>> produced (3/2)*2.5 = 2.76 times more frequently than 3".
>> "(3/2)*2.5 = 2.76" is wrong. The correct expression is "(3/2)**2.5 = 2.76".

> Indeed. Attached patch to fix this typo.

Indeed.  Pushed.

			regards, tom lane