Bug#232984: marked as done (apt-get space useage estimates appear over-optimistic)
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From: Ross Boylan <RossBoylan@stanfordalumni.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
CC: RossBoylan@stanfordalumni.org
Subject: apt-get space useage estimates appear over-optimistic
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Package: apt
Version: 0.5.21
Severity: minor
Over at least the last month I've noticed the estimates apt-get gives
for space useage after installs or upgrades appear suspiciously
optimistic. In one case I recall it told me that several MB would be
freed after upgrading a bunch of packages and removing none. Of
course, this is possible, but it's happening enough I thought I'd
check more closely. In my latest install, it said 2MB would be used,
and it appears at least 3MB were.
Before:
# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda9 256667 80920 162495 34% /
/dev/hda6 6846744 5489932 1078568 84% /usr
/dev/evms/scratch 4570988 3552032 1018956 78% /evms/scratch
/dev/evms/var 409576 345256 64320 85% /var
/dev/evms/home 1843132 1718620 124512 94% /home
/dev/evms/share 1638340 1434096 204244 88% /usr/share
/evms/scratch/apt-cache
4570988 3552032 1018956 78% /usr/var/cache/apt
/evms/scratch/local/download
4570988 3552032 1018956 78% /usr/local/download
/evms/scratch/kde3 4570988 3552032 1018956 78% /usr/local/src/kde3
tmpfs 193328 0 193328 0% /dev/shm
Note that mount -bind is being done for the dirs at the bottom
targetting /evms/scratch.
During:
# apt-get -q dist-upgrade
Reading Package Lists...
Building Dependency Tree...
The following packages have been kept back:
hylafax-client
The following packages will be upgraded:
cpp-3.3 cpp-3.3-doc cvs g++-3.3 g77-3.3 gcc-3.3 gcc-3.3-base
gcc-3.3-doc gobjc-3.3 libacl1 libattr1 libg2c0 libgcc1
libio-stringy-perl libmime-perl libobjc1 libstdc++5
libstdc++5-3.3-dev libstdc++5-3.3-doc maxima
20 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
Need to get 0B/19.4MB of archives.
After unpacking 2077kB of additional disk space will be used.
After:
# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda9 256667 80986 162429 34% /
/dev/hda6 6846744 5492900 1075600 84% /usr
/dev/evms/scratch 4570988 3552032 1018956 78% /evms/scratch
/dev/evms/var 409576 345288 64288 85% /var
/dev/evms/home 1843132 1718632 124500 94% /home
/dev/evms/share 1638340 1434168 204172 88% /usr/share
/evms/scratch/apt-cache
4570988 3552032 1018956 78%
/usr/var/cache/apt
/evms/scratch/local/download
4570988 3552032 1018956 78%
/usr/local/download
/evms/scratch/kde3 4570988 3552032 1018956 78%
/usr/local/src/kde3
tmpfs 193328
This is on a single-user system that was not connected to the internet
(i.e., no mail) during the session.
Despite the projected 2077kB to be used, /usr alone grew by about 3Mg,
with a bit of growth in / and /var as well.
Here's the example with the big free, from Feb 12:
# apt-get -q dist-upgrade
Reading Package Lists...
Building Dependency Tree...
The following packages will be REMOVED:
libevms-2.1
The following NEW packages will be installed:
gnuhtml2latex latex-xft-fonts libevms-2.2 libgksu0 wv
The following packages have been kept back:
hylafax-client
The following packages will be upgraded:
base-config bash bash-doc bind bind-doc console-tools cron debian-el
debview defoma defoma-doc dfontmgr e2fslibs e2fsprogs evms
evms-cli evms-gui evms-ncurses gcl gcl-doc gkrellm gkrellm-common
gksu kdeartwork-theme-window kernel-patch-xfs libblkid1
libcomerr2 libconsole libcurl2 libevms-dev libgnutls7 libgnutls7-dev
libgsm1 libltdl3 libqt3c102-mt-mysql libqt3c102-mt-odbc
libqt3c102-mt-psql libsdl-gfx1.2 libsmbclient libsmbclient-dev
libss2 libtool libtool-doc libuuid1 libxml2 libxml2-dev
libxml2-utils lsbdev-guide lyx lyx-common lyx-qt nethack-common
nethack-x11 psfontmgr pump qt3-doc samba samba-common samba-doc
sgml-data smbclient smbfs swat uuid-dev xml-core xmms
66 upgraded, 5 newly installed, 1 to remove and 1 not upgraded.
Need to get 0B/56.6MB of archives.
After unpacking 12.6MB disk space will be freed.
After this /usr had 5471044kB in use. My best estimate is that it had
5514576-28500= 5486076 before, so for a fall of 15MB, so perhaps
that's OK. Unfortunately, the 28.5MB is itself from an apt-get
estimate (for removing kernel-source-2.4.21; it sounds about right),
and there may have been other stuff going on.
So I'm not sure there's a problem, but I wanted to flag this issue in
case there is. It may also be that the estimates are another packages
responsibililty (dpkg?), but this is where I'm seeing the problem.
-- Package-specific info:
-- apt-config dump --
APT "";
APT::Architecture "i386";
APT::Build-Essential "";
APT::Build-Essential:: "build-essential";
APT::Default-Release "testing";
Dir "/";
Dir::State "var/lib/apt/";
Dir::State::lists "lists/";
Dir::State::cdroms "cdroms.list";
Dir::State::userstatus "status.user";
Dir::State::status "/var/lib/dpkg/status";
Dir::Cache "/usr/var/cache/apt";
Dir::Cache::archives "archives/";
Dir::Cache::srcpkgcache "srcpkgcache.bin";
Dir::Cache::pkgcache "pkgcache.bin";
Dir::Etc "etc/apt/";
Dir::Etc::sourcelist "sources.list";
Dir::Etc::vendorlist "vendors.list";
Dir::Etc::vendorparts "vendors.list.d";
Dir::Etc::main "apt.conf";
Dir::Etc::parts "apt.conf.d";
Dir::Etc::preferences "preferences";
Dir::Bin "";
Dir::Bin::methods "/usr/lib/apt/methods";
Dir::Bin::dpkg "/usr/bin/dpkg";
DPkg "";
DPkg::Pre-Install-Pkgs "";
DPkg::Pre-Install-Pkgs:: "/usr/bin/apt-listchanges --apt || test $? -ne 10";
DPkg::Pre-Install-Pkgs:: "/usr/sbin/dpkg-preconfigure --apt || true";
DPkg::Tools "";
DPkg::Tools::Options "";
DPkg::Tools::Options::/usr/bin/apt-listchanges "";
DPkg::Tools::Options::/usr/bin/apt-listchanges::Version "2";
DPkg::Post-Invoke "";
DPkg::Post-Invoke:: "test -f /var/run/zope.restart && invoke-rc.d zope restart ; rm -f /var/run/zope.restart";
DPkg::Post-Invoke:: "if [ -x /usr/sbin/localepurge ] && [ $(ps w -p $PPID | grep -c remove) != 1 ]; then /usr/sbin/localepurge; else exit 0; fi";
DSelect "";
DSelect::Clean "auto";
-- /etc/apt/preferences --
Explanation: Try to prevent unstable from creeping in
Package: *
Pin: release a=unstable
Pin-Priority: 50
-- /etc/apt/sources.list --
deb file:/var/cache/apt-build/repository apt-build main
# See sources.list(5) for more information, especialy
# Remember that you can only use http, ftp or file URIs
# CDROMs are managed throught the apt-cdrom tool.
# Proxy configuration is covered through environment variables or
#
### security ###
deb http://security.debian.org/ woody/updates main contrib non-free
###testing###
deb http://http.us.debian.org/debian testing main contrib non-free
deb http://non-us.debian.org/ testing/non-US main non-free contrib
# recommended in mozilla notes
#deb ftp://ftp.tux.org/pub/java/debian unstable main non-free
# but need gcc 3.2 versions
deb http://jopa.studentenweb.org/debian ./
# and for some AV stuff (mplayer)
deb ftp://ftp.nerim.net/debian-marillat/ testing main
deb-src http://perso.wanadoo.fr/debian/ unstable main
###Ximian/Helix###
#deb file:/usr/local/download/Helix woody main
#deb-src file:/usr/local/download/Helix woody main
#deb http://red-carpet.ximian.com/debian stable main
#deb-src http://red-carpet.ximian.com/debian stable main
###unstable###
deb http://http.us.debian.org/debian unstable main
deb-src http://http.us.debian.org/debian unstable main contrib non-free
deb-src http://non-us.debian.org/ unstable/non-US main non-free contrib
-- System Information:
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux wheat 2.4.21advncdfs #1 Wed Sep 17 22:06:42 PDT 2003 i686
Locale: LANG=en_US, LC_CTYPE=en_US
Versions of packages apt depends on:
ii libc6 2.3.2.ds1-11 GNU C Library: Shared libraries an
ii libgcc1 1:3.3.3-0pre3 GCC support library
ii libstdc++5 1:3.3.3-0pre3 The GNU Standard C++ Library v3
-- no debconf information
---------------------------------------
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>From mdz@alcor.net Mon Feb 16 20:38:16 2004
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Date: Mon, 16 Feb 2004 20:37:45 -0800
From: Matt Zimmerman <mdz@debian.org>
To: 232984-done@bugs.debian.org
Subject: [RossBoylan@stanfordalumni.org: Bug#232984: apt-get space useage estimates appear over-optimistic]
Message-ID: <20040217043745.GE12277@alcor.net>
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----- Forwarded message from Ross Boylan <RossBoylan@stanfordalumni.org> -----
Date: Mon, 16 Feb 2004 18:15:27 -0800
From: Ross Boylan <RossBoylan@stanfordalumni.org>
Resent-From: Ross Boylan <RossBoylan@stanfordalumni.org>
To: Adam Heath <doogie@debian.org>
Cc: Ross Boylan <RossBoylan@stanfordalumni.org>, 232984@bugs.debian.org
Subject: Bug#232984: apt-get space useage estimates appear over-optimistic
On Mon, Feb 16, 2004 at 01:43:13PM -0600, Adam Heath wrote:
> On Sun, 15 Feb 2004, Ross Boylan wrote:
>
> > This is on a single-user system that was not connected to the internet
> > (i.e., no mail) during the session.
> >
> > Despite the projected 2077kB to be used, /usr alone grew by about 3Mg,
> > with a bit of growth in / and /var as well.
>
> New files were installed, and old files deleted, but some running program
> still had the old files opened, so their space wasn't reclaimed.
>
That makes sense. And since the case with what I thought was the big
discrepancy looks OK too, this is probably a false alarm.
It's OK with me if you close it, or you can leave it to see if anyone
else notices a problem.
Thanks.
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- mdz
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