[From nobody Sun Oct 4 20:51:07 2026 Received: (at submit) by bugs.debian.org; 18 Dec 2016 17:33:19 +0000 X-Spam-Checker-Version: SpamAssassin 3.4.0-bugs.debian.org_2005_01_02 (2014-02-07) on buxtehude.debian.org X-Spam-Level: X-Spam-Status: No, score=-16.1 required=4.0 tests=BAYES_00,HAS_PACKAGE, RCVD_IN_DNSWL_NONE,RP_MATCHES_RCVD,SPF_PASS,X_DEBBUGS_CC autolearn=ham autolearn_force=no version=3.4.0-bugs.debian.org_2005_01_02 X-Spam-Bayes: score:0.0000 Tokens: new, 30; hammy, 138; neutral, 45; spammy, 0. spammytokens: hammytokens:0.000-+--H*F:U*sanvila, 0.000-+--H*rp:U*sanvila, 0.000-+--H*RU:sanvila@unex.es, 0.000-+--Hx-spam-relays-external:sanvila@unex.es, 0.000-+--H*RU:sk:zproxy0 Return-path: <sanvila@unex.es> Received: from zmta02.unex.es ([158.49.17.56]) by buxtehude.debian.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <sanvila@unex.es>) id 1cIfKd-00042y-34 for submit@bugs.debian.org; Sun, 18 Dec 2016 17:33:19 +0000 Received: from localhost (localhost [127.0.0.1]) by zmta02.unex.es (Postfix) with ESMTP id A7BBC60F53 for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:33:02 +0100 (CET) Received: from zmta02.unex.es ([127.0.0.1]) by localhost (zmta02.servicios.unex.es [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id pJuFW3Cm88Kc for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:33:00 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zmta02.unex.es (Postfix) with ESMTP id 511C360F9D for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:33:00 +0100 (CET) X-Virus-Scanned: amavisd-new at zmta02.siue Received: from zmta02.unex.es ([127.0.0.1]) by localhost (zmta02.servicios.unex.es [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 12Do2idDHCpy for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:33:00 +0100 (CET) Received: from zproxy02.unex.es (zproxy02.servicios.unex.es [10.254.208.62]) by zmta02.unex.es (Postfix) with ESMTPS id 285C560F53 for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:33:00 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zproxy02.unex.es (Postfix) with ESMTP id 1DFD360FF6 for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:33:00 +0100 (CET) Received: from zproxy02.unex.es ([127.0.0.1]) by localhost (zproxy02.servicios.unex.es [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 8WPeyFwnWqxj for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:32:59 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zproxy02.unex.es (Postfix) with ESMTP id 8A91B60F48 for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:32:59 +0100 (CET) X-Virus-Scanned: amavisd-new at zproxy02.siue Received: from zproxy02.unex.es ([127.0.0.1]) by localhost (zproxy02.servicios.unex.es [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id RQrYl2lFumwY for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:32:59 +0100 (CET) Received: from tulipan.isla-invisible.es (tulipan.isla-invisible.es [185.92.222.134]) by zproxy02.unex.es (Postfix) with ESMTPSA id 523B360F33 for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:32:59 +0100 (CET) Received: by tulipan.isla-invisible.es (Postfix, from userid 1000) id 50133A8E; Sun, 18 Dec 2016 18:32:51 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by tulipan.isla-invisible.es (Postfix) with ESMTP id 493BB183 for <submit@bugs.debian.org>; Sun, 18 Dec 2016 18:32:51 +0100 (CET) Date: Sun, 18 Dec 2016 18:32:51 +0100 (CET) From: Santiago Vila <sanvila@unex.es> To: Debian BTS <submit@bugs.debian.org> Subject: snap-aligner: Build requires 188 GB of memory (fortunately not used, just allocated) Message-ID: <alpine.DEB.2.11.1612181807380.32263@tulipan.isla-invisible.es> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) X-Debbugs-Cc: sanvila@debian.org MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Delivered-To: submit@bugs.debian.org Package: src:snap-aligner Version: 1.0~beta.18+dfsg-1 Hello Andreas et al. Building this package allocates 188 GB of memory. To see how this could be a problem, take a machine with a lot of memory, say, 64 GB of RAM, which btw is more than three times the amount required to build any other Debian package, and disable memory overcommiting by creating /etc/sysctl.d/10-no-overcommit.conf with this contents: vm.overcommit_ratio = 100 vm.overcommit_memory = 2 Then write "sysctl --system" to load those values. Then try to build this package in such machine, and it will fail. It is normally assumed that applications overcommit as a normal thing, but this package builds fine in a machine having as little as 1 GB of RAM, so the overcommit ratio is about 188:1. Maybe this package does actually require such high amount of memory to work, but as far as building is concerned, every other Debian package which I know (well, except gpgme which requires 230 GB, the only other anomaly I found) could be built with only 20 GB of RAM, so this package is really an outlier. Thanks. ]