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 1mTS2s-0004Kk-Ex for pgsql-hackers@arkaria.postgresql.org; Thu, 23 Sep 2021 16:58:02 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1mTS2r-0000Zj-Cv for pgsql-hackers@arkaria.postgresql.org; Thu, 23 Sep 2021 16:58:01 +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 1mTS2r-0000Zb-2O for pgsql-hackers@lists.postgresql.org; Thu, 23 Sep 2021 16:58:01 +0000 Received: from mail-io1-xd32.google.com ([2607:f8b0:4864:20::d32]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1mTS2k-0007AI-A5 for pgsql-hackers@postgresql.org; Thu, 23 Sep 2021 16:58:00 +0000 Received: by mail-io1-xd32.google.com with SMTP id m11so8954965ioo.6 for ; Thu, 23 Sep 2021 09:57:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=reZBe9jZE5Ah9UONCt0IKlIsyBxqUh4xk4j8lFVSNKk=; b=igX5MEYskD1IKxv4zOSGh5DUDy6WkNelC5jtBuV+iTAq5qKZIOtaM6dDs9xtmi5Eil 2XXZtRzuYCleGscETW9l5e8O5jiST5gEh15pHA0cWVc7y3S03iFBxcgkqEd5xUj9APHX sLr6UCnM6s+AkPF+wS0qvaHpjzT3MikCMr1AlG6bqknUHsLkGBCs26NszlHmg3GhCoSf truoVoyvSzLLxNB7+0lhmTfyWKUgKlDeOixfqygFT/MeKM28QvS4oM20ss/ba1vCxtGJ fDfHX/Y2/XSfeP3MIRyIqLrVLohYdhj4fF49QQdu+F0BPxVQ8RRxxIx0ZwzBRAD65vT8 Y+tw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=reZBe9jZE5Ah9UONCt0IKlIsyBxqUh4xk4j8lFVSNKk=; b=aRdgBLVCt54GNbpgweYDujY7I09oM5dR9HO58UcmSxQsRPJk8x9G330bktLMrDZBl9 Z9z8K7hzip/o4fFMFDJY/H0cMVUSj65+xz1Kn9OVnXyd4BVeD3w4NM3oDgn4DGSO5xpy pekK24/O5mWGqnQC5+HkCY7z7nWMHKbr7kIAoBZXsgZ++gu4aqDGUjucwJ2QmGdcrRbW kcAn/jn6LU/KTRwTpGtadcLUu6mT8OBXix3vJh6zh0wiCB3iRy34gNTpdnhZExcB+wlO q3m9LBabjcQ6p3p3u0a9SyqdK+zzUNvoyuoqhmk6WTGbA6mXEvtap4WIibn5i456r/I+ IkZw== X-Gm-Message-State: AOAM530kW+S5TBGWbmLhh1nuWzFFUN5wCqGX5VmWP54aAtvBit6Au4EU ggp5kvy1OkpbnEuDWJUF6KZe6QZMOJjCrWC584A= X-Google-Smtp-Source: ABdhPJx5TnnxGF+gN5X68XNdcy+MeZ9cBGtilHlq9/yR5gAYTDSgEMi1lz40g3YeSgPPAR01YwfKZk8sX6w/sQY643I= X-Received: by 2002:a05:6638:f8b:: with SMTP id h11mr4921202jal.141.1632416272285; Thu, 23 Sep 2021 09:57:52 -0700 (PDT) MIME-Version: 1.0 References: <20210916171427.GR831@telsasoft.com> <4E144FAA-F3B1-42C3-9748-714ADB4BCC22@amazon.com> <3E81D643-0759-4373-BEA6-5BF8818710BF@amazon.com> <38A91A51-F041-4ED6-8A8F-6A0D3D38E756@amazon.com> In-Reply-To: From: Robert Haas Date: Thu, 23 Sep 2021 12:57:41 -0400 Message-ID: Subject: Re: Estimating HugePages Requirements? To: Michael Paquier Cc: "Bossart, Nathan" , Justin Pryzby , Kyotaro Horiguchi , "tgl@sss.pgh.pa.us" , "masao.fujii@oss.nttdata.com" , "andres@anarazel.de" , "magnus@hagander.net" , "mark.dilger@enterprisedb.com" , "don@seiler.us" , "pgsql-hackers@postgresql.org" Content-Type: text/plain; charset="UTF-8" List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk On Tue, Sep 21, 2021 at 11:53 PM Michael Paquier wrote: > I am not sure either as that's a tradeoff between an underestimation > and no information. The argument of consistency indeed matters. > Let's see if others have any opinion to share on this point. Well, if we think the information won't be safe to use, it's better to report nothing than a wrong value, I think. -- Robert Haas EDB: http://www.enterprisedb.com