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 1lZOsB-0004Bv-05 for pgsql-hackers@arkaria.postgresql.org; Thu, 22 Apr 2021 02:15:19 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1lZOs9-00031G-Ha for pgsql-hackers@arkaria.postgresql.org; Thu, 22 Apr 2021 02:15:17 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lZOs9-000318-Aj for pgsql-hackers@lists.postgresql.org; Thu, 22 Apr 2021 02:15:17 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lZOs6-0004p4-Cc for pgsql-hackers@postgresql.org; Thu, 22 Apr 2021 02:15:16 +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 13M2F7Ot898413; Wed, 21 Apr 2021 22:15:07 -0400 From: Tom Lane To: Andres Freund cc: Thomas Munro , Stephen Frost , Alvaro Herrera , David Steele , Dmitry Dolgov <9erthalion6@gmail.com>, Jakub Wartak , Tomas Vondra , pgsql-hackers Subject: Re: WIP: WAL prefetch (another approach) In-reply-to: <20210422013411.tbcaqqq6c23s2pxy@alap3.anarazel.de> References: <8dd2dcc2-0b6b-a4ab-c1b3-032c0a5ab1c3@enterprisedb.com> <773932.1619022622@sss.pgh.pa.us> <892344.1619054465@sss.pgh.pa.us> <20210422013411.tbcaqqq6c23s2pxy@alap3.anarazel.de> Comments: In-reply-to Andres Freund message dated "Wed, 21 Apr 2021 18:34:11 -0700" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <898411.1619057707.1@sss.pgh.pa.us> Date: Wed, 21 Apr 2021 22:15:07 -0400 Message-ID: <898412.1619057707@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Andres Freund writes: > On 2021-04-21 21:21:05 -0400, Tom Lane wrote: >> What I'm doing is running the core regression tests with a single >> standby (on the same machine) and wal_consistency_checking = all. > Do you run them over replication, or sequentially by storing data into > an archive? Just curious, because its so painful to run that scenario in > the replication case due to the tablespace conflicting between > primary/standby, unless one disables the tablespace tests. No, live over replication. I've been skipping the tablespace test. > Have you tried reproducing it on commits before the recent xlogreader > changes? Nope. regards, tom lane