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 1lO4tb-00079V-9H for pgsql-hackers@arkaria.postgresql.org; Sun, 21 Mar 2021 20:41:59 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1lO4ta-0005q8-2v for pgsql-hackers@arkaria.postgresql.org; Sun, 21 Mar 2021 20:41:58 +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 1lO4tZ-0005o0-OA for pgsql-hackers@lists.postgresql.org; Sun, 21 Mar 2021 20:41:57 +0000 Received: from mail-io1-xd29.google.com ([2607:f8b0:4864:20::d29]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.92) (envelope-from ) id 1lO4tU-0005Ry-8q for pgsql-hackers@lists.postgresql.org; Sun, 21 Mar 2021 20:41:55 +0000 Received: by mail-io1-xd29.google.com with SMTP id r193so11821674ior.9 for ; Sun, 21 Mar 2021 13:41:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telsasoft-com.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=RhkHEjHZIZkzxEGAAObKCWtENaqIJdp9XhKcrPP/5iw=; b=lVdqEHxpg0xTA5+35tHj7POBFQgkgb4V/k/AB9cENDl5T3rbEGtHY+cpQsmoH0rAf8 Z3o23abTQq7iVYe6NSsxcKy1PZs/9fd5lf49OWgwJluEdxV6TYpu8Q1G4avPKB7TKWDm 9kuUirPrks5nrXWkPu7dYaZepbhubQXe5e2UhD7toDtuLcZamYrQesXXYARiOMr6sVGy zfLi30SY+2qLREezdZa/D5WYgXkfoT7xZztdsjh3nj7bztWM62pech1mfF05l/GGYHuN ZNd2JXUtRKrYtezofL578oOYiJureOt+WZEFmejelCTYfWu7UA7lgc1+kCastk5epSjF Lryw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=RhkHEjHZIZkzxEGAAObKCWtENaqIJdp9XhKcrPP/5iw=; b=bKKtttizE+n5ka2L6NAjbBzD034/EgNklnO3xniflf5wSIssyMVPQYr2yG/gGvkQi5 FKFnHbp4ZpaXb7yjXwnvaKuY9xxN+m16yz1GKqhs5v7R2BStkNWo5AM5gXqFpfcusytf mjkknkbmNURV8rBcGrAg+Pv1YKao47mSg1TQXIMz8SJW7xsm0hkzwk2uKcOsAFwOfvbA Zx/tfCDND82M4LZkuV6/m1yXGzD8hJWRRgVN1O7O7zSE6OE6ANcxkyOHXlHj1ymqlcyT wO7zh3zBlf8IsRydxA2MpyHcRWNS/Nt1nyAGJHGcoRj26zY5Ae9YY6q7SvGd0BmiHx0n y41w== X-Gm-Message-State: AOAM532HR7i/rGNEF5rKPoYquKhXe6VCRHXE7Okx9GRZrILKr4vOY66E KOKMKmAwLHtWmaJWKJIgYDUh2A== X-Google-Smtp-Source: ABdhPJyz8irzOWrfblBLCpVQ7XtCiW2eN/tAg7JKPVvvoD6qww3SEngREOhHOwO2Ex//s6TIg47jeQ== X-Received: by 2002:a6b:3c1a:: with SMTP id k26mr8783902iob.113.1616359310237; Sun, 21 Mar 2021 13:41:50 -0700 (PDT) Received: from pryzbyj.telsasoft (charmander.telsasoft.com. [50.244.222.1]) by smtp.gmail.com with ESMTPSA id d3sm6729341ilo.32.2021.03.21.13.41.49 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 21 Mar 2021 13:41:49 -0700 (PDT) Received: by pryzbyj.telsasoft (Postfix, from userid 1000) id C0BA2801098; Sun, 21 Mar 2021 15:41:48 -0500 (CDT) Date: Sun, 21 Mar 2021 15:41:48 -0500 From: Justin Pryzby To: Tom Lane Cc: Dilip Kumar , Robert Haas , Andres Freund , Tomas Vondra , Alexander Korotkov , David Steele , Ildus Kurbangaliev , Dmitry Dolgov <9erthalion6@gmail.com>, Andrey Borodin , PostgreSQL Hackers Subject: Re: [HACKERS] Custom compression methods (mac+lz4.h) Message-ID: <20210321204148.GB4203@telsasoft.com> References: <20210319174425.GM11765@telsasoft.com> <20210320212302.GW11765@telsasoft.com> <301730.1616276227@sss.pgh.pa.us> <20210320231957.GX11765@telsasoft.com> <309337.1616287493@sss.pgh.pa.us> <311370.1616290403@sss.pgh.pa.us> <414943.1616358751@sss.pgh.pa.us> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <414943.1616358751@sss.pgh.pa.us> User-Agent: Mutt/1.9.4 (2018-02-28) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk On Sun, Mar 21, 2021 at 04:32:31PM -0400, Tom Lane wrote: > This seems somewhat repeatable (three identical failures in three > attempts). Not sure why I did not see it yesterday; but anyway, > there is something wrong with partial detoasting for LZ4. With what version of LZ4 ? -- Justin