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 1se8zo-004GcM-0g for pgsql-general@arkaria.postgresql.org; Wed, 14 Aug 2024 08:04:40 +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 1se8zl-008xMK-Ls for pgsql-general@arkaria.postgresql.org; Wed, 14 Aug 2024 08:04:37 +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 1se8zl-008xMB-54 for pgsql-general@lists.postgresql.org; Wed, 14 Aug 2024 08:04:37 +0000 Received: from mail-oi1-x230.google.com ([2607:f8b0:4864:20::230]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1se8ze-004fgF-OK for pgsql-general@lists.postgresql.org; Wed, 14 Aug 2024 08:04:35 +0000 Received: by mail-oi1-x230.google.com with SMTP id 5614622812f47-3db16129143so3572944b6e.0 for ; Wed, 14 Aug 2024 01:04:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1723622670; x=1724227470; darn=lists.postgresql.org; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=qSbb9QuGVz3EpbLQWefC9EyOag4LpG0ges5AgZSW+r4=; b=Qt3r9NvE2n3OX7ltvF4LaOoo/ymkD5nabXazuXoHN9XrxepyHnlYXvHyKjZhmdMQvy bpSlUSDRGku/JdGMBy0gr4MubivJn7MsWAotLWS/6CyZITWARHTqfOyq3iLjfgh2z6my fbS3okK79fabzUJ7AmNu/g2abllHW1eQb94d3AERphQhaiHFaU9s0eDHTLcoVR4RRGJV O/CmYdf3VcFVlziqRZo3FVuBnWjCrYqE15yeVUF1DjZ2wLb4LdsR1SQXt+rtknP4xIqZ i1nWLp7cegQv5h5bTF4HJeaxFL/0s4SxGWo5brfby0Q4E0y6Cgk5qM4PcbYcoPepsISk bzOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723622670; x=1724227470; h=content-transfer-encoding:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qSbb9QuGVz3EpbLQWefC9EyOag4LpG0ges5AgZSW+r4=; b=Ew7nD0FuxcqRHcRHgX5osvEeL9KJqBVWjgkj91cpAm0S0AQ7QBiP+dn9vPk99f/C6k 0ZsFGz6HuAr1v+trVUbpzLC4gUXaJixU4+qz8sOtTOjH0PcPgMvdwd6z+dmr9W5c2WYT KQ4dfdINz3C7kyGpOA6aDwk6Hsj6AHEoLhuAAkLyPDHk19OMxRVItKYL5xiiWSdu1jZo WFa3jD2BXFQgfbo5VA2sm6sPP8f+1pWNoaXOrswhG8pbJAFejlEdPlGVWtKg6c3mXXyy zzVoYpC0RfFZU+/AwdVEQ6t0lAQWQyEkq9D6Eu/QVjZ7tTh/UH482Fu7pJemCvRPBmQJ N/hQ== X-Gm-Message-State: AOJu0YzG17RHrBLuIjsVBMQoT/2dmSprrFAdjaZPPh62LIA45M0Kf25Y vCOQ7KDM1fZch9Uwk4/XY1n1916mpHpx9qSnJLJKX4PgunMr2A8inGgny0Rsx/q+Lq69L8KBRtf mFppjnkgv7XSycTmZW8l3MmJ1bfy4RA== X-Google-Smtp-Source: AGHT+IG0a7hzCsqY9rcXoNulLyUo4XNQra2Yym3j6vPvJO7i/NKiA4Qsl5hawHxEni0f9/BSTvQOW9r593WrYbriOZs= X-Received: by 2002:a05:6808:4484:b0:3d9:22a4:d5f3 with SMTP id 5614622812f47-3dd29912cf8mr2195540b6e.21.1723622669747; Wed, 14 Aug 2024 01:04:29 -0700 (PDT) MIME-Version: 1.0 References: <20240813205351.eqzihh5t7urh7olf@hjp.at> In-Reply-To: <20240813205351.eqzihh5t7urh7olf@hjp.at> From: Dominique Devienne Date: Wed, 14 Aug 2024 10:04:17 +0200 Message-ID: Subject: Re: Column type modification in big tables To: pgsql-general@lists.postgresql.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk On Tue, Aug 13, 2024 at 10:54=E2=80=AFPM Peter J. Holzer = wrote: > You could look at the data files. Tables in PostgreSQL are stored as a > series of 1GB files, so you watching them being created and/or read > gives you a pretty good idea about progress. Thanks Peter, very insightful. Appreciated. --DD