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 1ux9Hx-00BKiM-0f for pgsql-general@arkaria.postgresql.org; Fri, 12 Sep 2025 19:18:29 +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 1ux9Hu-003dmJ-S0 for pgsql-general@arkaria.postgresql.org; Fri, 12 Sep 2025 19:18:27 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1ux9Hu-003dm5-HN for pgsql-general@lists.postgresql.org; Fri, 12 Sep 2025 19:18:27 +0000 Received: from mail-ed1-x52d.google.com ([2a00:1450:4864:20::52d]) by magus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from ) id 1ux9Hr-000TIG-1m for pgsql-general@postgresql.org; Fri, 12 Sep 2025 19:18:27 +0000 Received: by mail-ed1-x52d.google.com with SMTP id 4fb4d7f45d1cf-61cd6089262so3465745a12.3 for ; Fri, 12 Sep 2025 12:18:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1757704704; x=1758309504; darn=postgresql.org; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=viY/IBwl6uFiF+1qrI835CI7zZnLPO4c0PwQlZuCCx8=; b=PZxyXFHgPASgGx3m/29erBViXYHzjgCJuqtuKAYwpjlxSeZLOZv2EMc0U24R5Cxmot 9+qSiz5VzLmnHypqOAmbF6gtE41BAgjA1yuAruIjBGq1pHcD+rbgD/NtzJvRNDykGCUx QK25cEQnJmYAATKcHtEVB5jBtbCRritzYIeX5+ACZUq6ckaQFxe+9BZU8USAD/L9b3vL MDbpOhea5c3Vm2Gg5nn6neCKUcx4RutEhqktK6AgLtXhTz848rz6G8mOSkpOAuZ3BtKs UK/wcP/fInxiGV17g3dllx8UK8oYtmMAFRNjRGMvaYC+6+fEWkXfk1tfSFU6ZQsKL90o P3QQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757704704; x=1758309504; h=cc: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=viY/IBwl6uFiF+1qrI835CI7zZnLPO4c0PwQlZuCCx8=; b=gp8+NZYnya7iKfDu/sa0xf0hAJfipXx2Pz6gO0B7QSW8BxbUvkcvUlrReygsxAtSFF NTu8DZYo1CN8JZUoyk51moyZ5a+NvhBihuopeIx6JM6rGYI0jsHOR7NaEXszl9CIRBle 2OXKJwx1m+PLU7eyx6vDsHseKNGOGZbk3uJDQP+pU0pxN4yjK8u3yxSNM+XPpxeFiSH7 q2HF8TC1OHUzhSAm+Ph25YHExuQDwZM4HK3SwjrfHf92/35xqoOSzc+hTR+J9hQSVSJP fCEIsc4hH4wqgmbPZOrRoWowknU8+7O78U7ymW6Wsb7fr2B2zCFoB7S+t/ED9xBiHfst W68A== X-Forwarded-Encrypted: i=1; AJvYcCXYcuGeN9uFkkc2+WQPRCVJY2HaYqWitjlRvYu+R9b7hrwoQ4KvOYWUGohvxV3XzCZ4P/r/bba87h3xhVRO@postgresql.org X-Gm-Message-State: AOJu0YxOZ8Dk/0NwYYCo/X8+BGlYyuYmEj1lPfyJhojUkhuEUulrOYc1 06FH/DEYzCdAE8D4fgkV2jP7HyTM9wTBpMQNtBL6u/jjCdz3VsgVjtZdouE/rUgE86cyEUA3wd/ xISx0O2Cqb0IN/QnSii6BIYfrHPWOrXY= X-Gm-Gg: ASbGncuqyE6SWWgMnrFYl4XM4V1KSsDfjFehvuW9trLm0cmPs1IXhPUmmb+st/XzU2n CQLOhX0XNsDMciWr7SrwTbAH8aowhkwu3Qto/YLHWtbnsZFRgK6BRS45BTSffNOxRWlwj85Dzq1 sgSX6AlXL7m82wmewV2ljjyRAmLLuNCz9y4SY2ULYTuHbCsVGn7drGSWYShy/80iuOYymvmM+Q6 /qdcJI= X-Google-Smtp-Source: AGHT+IEYZ0X2m5PWL9PhhE2boirTJ5aOJ9oDh8+80t6wyKKkgZwnKc5YfnOP3fowiaa91STmnc3z8ERuZa2KNFQdRtY= X-Received: by 2002:a05:6402:40d3:b0:627:73d4:5d9d with SMTP id 4fb4d7f45d1cf-62ed7eccd92mr4010668a12.3.1757704703593; Fri, 12 Sep 2025 12:18:23 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Ellen Allhatatlan Date: Fri, 12 Sep 2025 20:16:51 +0100 X-Gm-Features: AS18NWBQhztJc_q7BAnsNSnYJGseK2P9LSD_Gb_YpHYKXMPWMdnEVy5x-eWKlVU Message-ID: Subject: Re: MVCC and all that... To: Merlin Moncure Cc: Justin , pgsql-general Content-Type: text/plain; charset="UTF-8" List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk You, (Merlin Moncure) said: > Technical discussions from the 80's are more or less historically interesting only. I agree with your technical points - and the fact that I brought up "history". I was replying to Justin in this context: I wrote: > AIUI, Michael Stonebraker suggested that the process model > would/should be "upgraded" to a threaded one at some point in the > system's developement? To which Justin replied: > I am going to need a source on this. Process vs Threads: pro and cons are very well documented and proven today. Hence the history lesson - to provide the "source" from Michael Stonebraker HTH. > merlin -- El!