From: "Shawn O. Pearce" <spearce@spearce.org>
To: Steven Grimm <koreth@midwinter.com>
Cc: Junio C Hamano <gitster@pobox.com>, Nicolas Pitre <nico@cam.org>,
Nix <nix@esperi.org.uk>,
Linus Torvalds <torvalds@linux-foundation.org>,
Git Mailing List <git@vger.kernel.org>
Subject: Re: People unaware of the importance of "git gc"?
Date: Wed, 5 Sep 2007 22:56:40 -0400 [thread overview]
Message-ID: <20070906025640.GL18160@spearce.org> (raw)
In-Reply-To: <46DF6AA8.60804@midwinter.com>
Steven Grimm <koreth@midwinter.com> wrote:
> Shawn O. Pearce wrote:
> >But this suffers from the same fate if the user sets gc.auto too
> >small and doesn't realize that the reason Git is always repacking
> >is because over the last 6 months they have been unlucky enough to
> >stage the magic number of unreachable blobs into the 17 directory
> >and they have *never* run `git gc --prune` because the auto thing
> >is working just fine for them and they don't realize they need to
> >prune every once in a blue moon.
>
> Check the modification times on those files and don't count ones that
> are older than the last git-gc run, maybe? That'd take care of the problem.
Eh, that could mean a bunch of stat calls that it would be nice
to avoid. The counter Junio (and git-gui) implements just does
a readdir(). Reasonably cheap.
Maybe just save a ".git/gc_last_auto" with the last object count
of .git/objects/17, after repacking. If the count is over the
gc.auto limit *and* is still over the limit after subtracting the
".git/gc_last_auto" value then consider that auto is required.
This way the file is only consulted if we are really thinking
about running a repack, and its only written to if we actually do
the repack. So we only take the extra penalty if we are going to
be taking a *really* big extra penalty by repacking.
--
Shawn.
next prev parent reply other threads:[~2007-09-06 2:57 UTC|newest]
Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-05 7:09 People unaware of the importance of "git gc"? Linus Torvalds
2007-09-05 7:21 ` Martin Langhoff
2007-09-05 7:37 ` Karl Hasselström
2007-09-05 7:30 ` Junio C Hamano
2007-09-05 7:26 ` Tomash Brechko
2007-09-05 8:13 ` Johan Herland
2007-09-05 8:39 ` Matthieu Moy
2007-09-05 8:41 ` Johan Herland
2007-09-05 8:47 ` David Kastrup
2007-09-05 8:51 ` Pierre Habouzit
2007-09-05 9:02 ` David Kastrup
2007-09-05 9:04 ` Matthieu Moy
2007-09-05 8:51 ` Wincent Colaiuta
2007-09-05 7:42 ` Pierre Habouzit
2007-09-05 8:16 ` Junio C Hamano
2007-09-05 8:50 ` Steven Grimm
[not found] ` <86ps0xcwxo.fsf@lola.quinscape.zz>
2007-09-05 9:07 ` Steven Grimm
2007-09-05 9:13 ` David Kastrup
2007-09-05 9:07 ` Junio C Hamano
2007-09-05 9:27 ` Martin Langhoff
2007-09-05 9:33 ` Matthieu Moy
2007-09-05 14:17 ` Johan De Messemaeker
2007-09-05 17:31 ` Matthieu Moy
2007-09-05 23:56 ` Jeff King
2007-09-05 9:13 ` David Kastrup
2007-09-05 9:14 ` Pierre Habouzit
2007-09-05 17:51 ` Nix
2007-09-05 18:14 ` Steven Grimm
2007-09-05 18:22 ` Nix
2007-09-05 18:54 ` Nicolas Pitre
2007-09-05 20:01 ` Junio C Hamano
2007-09-05 20:35 ` Nicolas Pitre
2007-09-05 21:14 ` Nix
2007-09-05 21:46 ` Junio C Hamano
2007-09-05 23:04 ` Nicolas Pitre
2007-09-05 23:42 ` Junio C Hamano
2007-09-06 0:27 ` Carlos Rica
2007-09-06 5:55 ` David Kastrup
2007-09-05 21:49 ` Junio C Hamano
2007-09-05 21:59 ` Invoke "git gc --auto" from commit, merge, am and rebase Junio C Hamano
2007-09-06 2:39 ` Shawn O. Pearce
2007-09-05 20:37 ` [PATCH] Invoke "git gc --auto" from "git add" and "git fetch" Junio C Hamano
[not found] ` <69b0c0350709051357ifa547aarfe3e0b36cf9be98f@mail.gmail.com>
2007-09-05 20:59 ` Fwd: " Govind Salinas
2007-09-06 12:02 ` Johannes Schindelin
2007-09-05 21:18 ` People unaware of the importance of "git gc"? Alex Riesen
2007-09-06 2:44 ` Russ Dill
2007-09-06 2:52 ` Shawn O. Pearce
2007-09-06 9:28 ` Andreas Ericsson
2007-09-06 2:45 ` Shawn O. Pearce
2007-09-06 2:49 ` Steven Grimm
2007-09-06 2:56 ` Shawn O. Pearce [this message]
2007-09-06 15:54 ` Johannes Schindelin
2007-09-06 17:49 ` Junio C Hamano
2007-09-06 18:15 ` Linus Torvalds
2007-09-06 18:29 ` Steven Grimm
2007-09-06 23:12 ` Subject: [PATCH] git-merge-pack Junio C Hamano
2007-09-06 23:35 ` Linus Torvalds
2007-09-07 0:51 ` Nicolas Pitre
2007-09-07 1:58 ` Junio C Hamano
2007-09-07 2:32 ` Nicolas Pitre
2007-09-07 4:07 ` Shawn O. Pearce
2007-09-07 4:43 ` Junio C Hamano
2007-09-08 9:50 ` [PATCH] make sha1_file.c::matches_pack_name() available to others Junio C Hamano
2007-09-08 10:01 ` [PATCH] pack-objects --repack-unpacked Junio C Hamano
2007-09-07 7:11 ` Subject: [PATCH] git-merge-pack Johannes Sixt
2007-09-07 7:34 ` Junio C Hamano
2007-09-07 7:24 ` Andy Parkins
2007-09-07 4:48 ` People unaware of the importance of "git gc"? Shawn O. Pearce
2007-09-07 10:12 ` Johannes Schindelin
2018-10-07 18:28 ` What's so special about objects/17/ ? Ævar Arnfjörð Bjarmason
2018-10-07 18:35 ` Johannes Sixt
2018-10-07 19:06 ` Ævar Arnfjörð Bjarmason
2018-10-07 22:39 ` Johannes Sixt
2018-10-08 0:54 ` Junio C Hamano
2018-10-07 19:46 ` Junio C Hamano
2018-10-07 20:07 ` Junio C Hamano
2018-10-08 19:17 ` Stefan Beller
2018-10-09 1:03 ` Junio C Hamano
2018-10-09 17:37 ` Stefan Beller
2018-10-10 1:10 ` Junio C Hamano
2018-10-10 19:08 ` Stefan Beller
2018-10-08 10:36 ` Ævar Arnfjörð Bjarmason
2018-10-09 1:07 ` Junio C Hamano
2018-10-09 17:40 ` Stefan Beller
2007-09-05 8:16 ` People unaware of the importance of "git gc"? David Kastrup
2007-09-05 16:47 ` Govind Salinas
2007-09-05 17:19 ` Carl Worth
2007-09-05 17:55 ` Jing Xue
2007-09-05 17:35 ` Steven Grimm
2007-09-05 18:28 ` Nix
2007-09-05 17:44 ` J. Bruce Fields
2007-09-05 18:46 ` Brandon Casey
2007-09-05 19:09 ` David Kastrup
2007-09-05 19:13 ` J. Bruce Fields
2007-09-05 19:43 ` David Kastrup
2007-09-05 19:20 ` Mike Hommey
2007-09-05 21:07 ` Alex Riesen
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