Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kzoCa-00009S-Dp for pgsql-hackers@arkaria.postgresql.org; Wed, 13 Jan 2021 22:01:16 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1kzoC0-00060E-Ik for pgsql-hackers@arkaria.postgresql.org; Wed, 13 Jan 2021 22:00:40 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kzoC0-000607-Be for pgsql-hackers@lists.postgresql.org; Wed, 13 Jan 2021 22:00:40 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by makus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1kzoBt-0006e2-Oz for pgsql-hackers@lists.postgresql.org; Wed, 13 Jan 2021 22:00:39 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 10DM0SxK1338244; Wed, 13 Jan 2021 17:00:28 -0500 From: Tom Lane To: James Coleman cc: Alvaro Herrera , Michael Paquier , David Johnston , PostgreSQL Developers , Andres Freund Subject: Re: [DOC] Document concurrent index builds waiting on each other In-reply-to: References: <20210113211604.GA16584@alvherre.pgsql> <1337019.1610573371@sss.pgh.pa.us> Comments: In-reply-to James Coleman message dated "Wed, 13 Jan 2021 16:48:37 -0500" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <1338242.1610575228.1@sss.pgh.pa.us> Date: Wed, 13 Jan 2021 17:00:28 -0500 Message-ID: <1338243.1610575228@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk James Coleman writes: > On Wed, Jan 13, 2021 at 4:29 PM Tom Lane wrote: >> but the antecedent of "a table" is a bit unclear; people might >> wonder if it means the table being reindexed. > It does mean the table being reindexed; the last phrase says "any > table" meaning "any other table". [ raised eyebrow ] Surely REINDEX and VACUUM can't run on the same table at the same time. regards, tom lane