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 4.94.2) (envelope-from ) id 1tld0W-000gfd-DG for pgsql-hackers@arkaria.postgresql.org; Sat, 22 Feb 2025 00:04:36 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1tld0V-001No8-D0 for pgsql-hackers@arkaria.postgresql.org; Sat, 22 Feb 2025 00:04:35 +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 4.94.2) (envelope-from ) id 1tld0V-001No0-3Z for pgsql-hackers@lists.postgresql.org; Sat, 22 Feb 2025 00:04:35 +0000 Received: from sss.pgh.pa.us ([68.162.161.243]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tld0R-0003B8-2h for pgsql-hackers@lists.postgresql.org; Sat, 22 Feb 2025 00:04:33 +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 51M04Vdr3737951; Fri, 21 Feb 2025 19:04:31 -0500 From: Tom Lane To: Robert Haas cc: Ilia Evdokimov , Andrei Lepikhov , pgsql-hackers@lists.postgresql.org Subject: Re: explain analyze rows=%.0f In-reply-to: References: <70bc1af0-6910-4f71-84ba-fa02095fe9ba@tantorlabs.com> <3212947.1739306803@sss.pgh.pa.us> <3365160.1739385615@sss.pgh.pa.us> <0e4c813a-18eb-41e2-8edb-89b78d43c82d@gmail.com> <01ec86c1-e04b-4cbe-b641-22cae8b87604@tantorlabs.com> <73e2440e-7d8b-4860-974d-931a93326d95@gmail.com> <7ab512ac-ee! d1-4fc8-9c5f-b42c0b0d313e@tantorlabs.com> Comments: In-reply-to Robert Haas message dated "Fri, 21 Feb 2025 16:44:28 -0500" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <3737949.1740182671.1@sss.pgh.pa.us> Content-Transfer-Encoding: quoted-printable Date: Fri, 21 Feb 2025 19:04:31 -0500 Message-ID: <3737950.1740182671@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Robert Haas writes: > Well, not quite yet, at least. There are two buildfarm failures since > I committed this. The first is here: A very significant fraction of the buildfarm is now pink. If you don't have a fix pretty nearly ready, please revert. > I imagine what happened here is that the parallel workers didn't > start, and so nloops was 1 instead of >1, and so we got an integer > output instead of a fractional one. Sounds plausible. I note that this run: https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=3Dskimmer&dt=3D202= 5-02-21%2023%3A00%3A10 got through a couple of iterations of the core tests before failing, showing that it's not 100% reproducible even on the machines where it's happening. regards, tom lane