Gecko [ edgpens.lpkmn.gov.my ]

Name	Size	Permission
howto	[ DIR ]	drwxrwxrwx
technical	[ DIR ]	drwxrwxrwx
MyFirstContribution.html	101.54 KB	-rw-rw-rw-
MyFirstObjectWalk.html	72.23 KB	-rw-rw-rw-
SubmittingPatches.html	63.36 KB	-rw-rw-rw-
ToolsForGit.html	32.1 KB	-rw-rw-rw-
docbook-xsl.css	4.45 KB	-rw-rw-rw-
everyday.html	29.84 KB	-rw-rw-rw-
git-add.html	50.6 KB	-rw-rw-rw-
git-am.html	42.42 KB	-rw-rw-rw-
git-annotate.html	40.26 KB	-rw-rw-rw-
git-apply.html	44.28 KB	-rw-rw-rw-
git-archive.html	41.15 KB	-rw-rw-rw-
git-bash.html	34.89 KB	-rw-rw-rw-
git-bisect-lk2009.html	92.39 KB	-rw-rw-rw-
git-bisect.html	52.17 KB	-rw-rw-rw-
git-blame.html	51.15 KB	-rw-rw-rw-
git-branch.html	51.74 KB	-rw-rw-rw-
git-bugreport.html	32.14 KB	-rw-rw-rw-
git-bundle.html	45.7 KB	-rw-rw-rw-
git-cat-file.html	47.64 KB	-rw-rw-rw-
git-check-attr.html	34.93 KB	-rw-rw-rw-
git-check-ignore.html	35.68 KB	-rw-rw-rw-
git-check-mailmap.html	31.67 KB	-rw-rw-rw-
git-check-ref-format.html	36.54 KB	-rw-rw-rw-
git-checkout-index.html	37.72 KB	-rw-rw-rw-
git-checkout.html	59.77 KB	-rw-rw-rw-
git-cherry-pick.html	42.18 KB	-rw-rw-rw-
git-cherry.html	35.1 KB	-rw-rw-rw-
git-citool.html	30.53 KB	-rw-rw-rw-
git-clean.html	35.76 KB	-rw-rw-rw-
git-clone.html	52.58 KB	-rw-rw-rw-
git-column.html	32.85 KB	-rw-rw-rw-
git-commit-graph.html	36.99 KB	-rw-rw-rw-
git-commit-tree.html	39.13 KB	-rw-rw-rw-
git-commit.html	65.26 KB	-rw-rw-rw-
git-config.html	367.82 KB	-rw-rw-rw-
git-count-objects.html	31.79 KB	-rw-rw-rw-
git-credential-cache--daemon.h...	31.06 KB	-rw-rw-rw-
git-credential-cache.html	32.78 KB	-rw-rw-rw-
git-credential-store.html	34.74 KB	-rw-rw-rw-
git-credential.html	37.47 KB	-rw-rw-rw-
git-daemon.html	46.12 KB	-rw-rw-rw-
git-describe.html	40.33 KB	-rw-rw-rw-
git-diff-files.html	86.05 KB	-rw-rw-rw-
git-diff-index.html	91.17 KB	-rw-rw-rw-
git-diff-tree.html	117.23 KB	-rw-rw-rw-
git-diff.html	95.61 KB	-rw-rw-rw-
git-difftool.html	37.25 KB	-rw-rw-rw-
git-fast-export.html	43.41 KB	-rw-rw-rw-
git-fast-import.html	111.36 KB	-rw-rw-rw-
git-fetch-pack.html	35.51 KB	-rw-rw-rw-
git-fetch.html	75.8 KB	-rw-rw-rw-
git-filter-branch.html	65.54 KB	-rw-rw-rw-
git-fmt-merge-msg.html	33.93 KB	-rw-rw-rw-
git-for-each-ref.html	50.37 KB	-rw-rw-rw-
git-for-each-repo.html	32.12 KB	-rw-rw-rw-
git-format-patch.html	88 KB	-rw-rw-rw-
git-fsck-objects.html	30.29 KB	-rw-rw-rw-
git-fsck.html	41.54 KB	-rw-rw-rw-
git-fsmonitor--daemon.html	32.83 KB	-rw-rw-rw-
git-gc.html	45.33 KB	-rw-rw-rw-
git-get-tar-commit-id.html	30.72 KB	-rw-rw-rw-
git-grep.html	46.16 KB	-rw-rw-rw-
git-gui.html	34.8 KB	-rw-rw-rw-
git-hash-object.html	32.4 KB	-rw-rw-rw-
git-help.html	39.51 KB	-rw-rw-rw-
git-hook.html	31.37 KB	-rw-rw-rw-
git-http-backend.html	43.25 KB	-rw-rw-rw-
git-http-fetch.html	32.29 KB	-rw-rw-rw-
git-http-push.html	34.02 KB	-rw-rw-rw-
git-imap-send.html	37.59 KB	-rw-rw-rw-
git-index-pack.html	36.71 KB	-rw-rw-rw-
git-init-db.html	30.34 KB	-rw-rw-rw-
git-init.html	38.32 KB	-rw-rw-rw-
git-instaweb.html	33.23 KB	-rw-rw-rw-
git-interpret-trailers.html	50.23 KB	-rw-rw-rw-
git-log.html	169.99 KB	-rw-rw-rw-
git-ls-files.html	41.98 KB	-rw-rw-rw-
git-ls-remote.html	35.17 KB	-rw-rw-rw-
git-ls-tree.html	37.84 KB	-rw-rw-rw-
git-mailinfo.html	35.02 KB	-rw-rw-rw-
git-mailsplit.html	31.95 KB	-rw-rw-rw-
git-maintenance.html	52.57 KB	-rw-rw-rw-
git-merge-base.html	40.83 KB	-rw-rw-rw-
git-merge-file.html	34.2 KB	-rw-rw-rw-
git-merge-index.html	33.18 KB	-rw-rw-rw-
git-merge-one-file.html	30.3 KB	-rw-rw-rw-
git-merge-tree.html	30.72 KB	-rw-rw-rw-
git-merge.html	78.28 KB	-rw-rw-rw-
git-mergetool--lib.html	31.87 KB	-rw-rw-rw-
git-mergetool.html	50.4 KB	-rw-rw-rw-
git-mktag.html	32.6 KB	-rw-rw-rw-
git-mktree.html	31.25 KB	-rw-rw-rw-
git-multi-pack-index.html	35.81 KB	-rw-rw-rw-
git-mv.html	32.81 KB	-rw-rw-rw-
git-name-rev.html	34.27 KB	-rw-rw-rw-
git-notes.html	49.29 KB	-rw-rw-rw-
git-p4.html	67.74 KB	-rw-rw-rw-
git-pack-objects.html	53.28 KB	-rw-rw-rw-
git-pack-redundant.html	31.61 KB	-rw-rw-rw-
git-pack-refs.html	32.54 KB	-rw-rw-rw-
git-patch-id.html	32.58 KB	-rw-rw-rw-
git-prune-packed.html	31.36 KB	-rw-rw-rw-
git-prune.html	33.06 KB	-rw-rw-rw-
git-pull.html	85.03 KB	-rw-rw-rw-
git-push.html	76.99 KB	-rw-rw-rw-
git-quiltimport.html	32.19 KB	-rw-rw-rw-
git-range-diff.html	43.82 KB	-rw-rw-rw-
git-read-tree.html	50.85 KB	-rw-rw-rw-
git-rebase.html	103.48 KB	-rw-rw-rw-
git-receive-pack.html	42.71 KB	-rw-rw-rw-
git-reflog.html	36.09 KB	-rw-rw-rw-
git-remote-ext.html	35.34 KB	-rw-rw-rw-
git-remote-fd.html	32.28 KB	-rw-rw-rw-
git-remote-helpers.html	29.82 KB	-rw-rw-rw-
git-remote.html	42.5 KB	-rw-rw-rw-
git-repack.html	41.93 KB	-rw-rw-rw-
git-replace.html	37.28 KB	-rw-rw-rw-
git-request-pull.html	33.02 KB	-rw-rw-rw-
git-rerere.html	39.71 KB	-rw-rw-rw-
git-reset.html	56.54 KB	-rw-rw-rw-
git-restore.html	39.97 KB	-rw-rw-rw-
git-rev-list.html	118.22 KB	-rw-rw-rw-
git-rev-parse.html	72.3 KB	-rw-rw-rw-
git-revert.html	37.42 KB	-rw-rw-rw-
git-rm.html	39.86 KB	-rw-rw-rw-
git-send-email.html	57.84 KB	-rw-rw-rw-
git-send-pack.html	36.87 KB	-rw-rw-rw-
git-sh-i18n--envsubst.html	31.05 KB	-rw-rw-rw-
git-sh-i18n.html	31.39 KB	-rw-rw-rw-
git-sh-setup.html	33.75 KB	-rw-rw-rw-
git-shell.html	34.17 KB	-rw-rw-rw-
git-shortlog.html	71.45 KB	-rw-rw-rw-
git-show-branch.html	38.33 KB	-rw-rw-rw-
git-show-index.html	32.2 KB	-rw-rw-rw-
git-show-ref.html	37.47 KB	-rw-rw-rw-
git-show.html	112.74 KB	-rw-rw-rw-
git-sparse-checkout.html	54.09 KB	-rw-rw-rw-
git-stage.html	30.24 KB	-rw-rw-rw-
git-stash.html	48.68 KB	-rw-rw-rw-
git-status.html	53.31 KB	-rw-rw-rw-
git-stripspace.html	32.76 KB	-rw-rw-rw-
git-submodule.html	55.69 KB	-rw-rw-rw-
git-subtree.html	47.96 KB	-rw-rw-rw-
git-svn.html	89.33 KB	-rw-rw-rw-
git-switch.html	41.98 KB	-rw-rw-rw-
git-symbolic-ref.html	32.69 KB	-rw-rw-rw-
git-tag.html	49.74 KB	-rw-rw-rw-
git-tools.html	30.05 KB	-rw-rw-rw-
git-unpack-file.html	30.51 KB	-rw-rw-rw-
git-unpack-objects.html	31.57 KB	-rw-rw-rw-
git-update-index.html	60.6 KB	-rw-rw-rw-
git-update-ref.html	38.35 KB	-rw-rw-rw-
git-update-server-info.html	30.84 KB	-rw-rw-rw-
git-upload-archive.html	32.58 KB	-rw-rw-rw-
git-upload-pack.html	32.47 KB	-rw-rw-rw-
git-var.html	32.49 KB	-rw-rw-rw-
git-verify-commit.html	30.76 KB	-rw-rw-rw-
git-verify-pack.html	31.71 KB	-rw-rw-rw-
git-verify-tag.html	30.75 KB	-rw-rw-rw-
git-version.html	30.66 KB	-rw-rw-rw-
git-web--browse.html	35.06 KB	-rw-rw-rw-
git-whatchanged.html	31.39 KB	-rw-rw-rw-
git-worktree.html	56.98 KB	-rw-rw-rw-
git-write-tree.html	31.25 KB	-rw-rw-rw-
git.html	106.92 KB	-rw-rw-rw-
gitattributes.html	92.19 KB	-rw-rw-rw-
gitcli.html	42 KB	-rw-rw-rw-
gitcore-tutorial.html	111 KB	-rw-rw-rw-
gitcredentials.html	43.44 KB	-rw-rw-rw-
gitcvs-migration.html	39.85 KB	-rw-rw-rw-
gitdiffcore.html	46.2 KB	-rw-rw-rw-
giteveryday.html	50.37 KB	-rw-rw-rw-
gitfaq.html	56.09 KB	-rw-rw-rw-
gitglossary.html	67.99 KB	-rw-rw-rw-
githooks.html	65.99 KB	-rw-rw-rw-
gitignore.html	40.59 KB	-rw-rw-rw-
gitk.html	40.38 KB	-rw-rw-rw-
gitmailmap.html	35.57 KB	-rw-rw-rw-
gitmodules.html	36.43 KB	-rw-rw-rw-
gitnamespaces.html	34.91 KB	-rw-rw-rw-
gitremote-helpers.html	58.26 KB	-rw-rw-rw-
gitrepository-layout.html	50.05 KB	-rw-rw-rw-
gitrevisions.html	51.97 KB	-rw-rw-rw-
gitsubmodules.html	44.09 KB	-rw-rw-rw-
gittutorial-2.html	46.96 KB	-rw-rw-rw-
gittutorial.html	57.55 KB	-rw-rw-rw-
gitweb.conf.html	80.7 KB	-rw-rw-rw-
gitweb.html	63.57 KB	-rw-rw-rw-
gitworkflows.html	52.47 KB	-rw-rw-rw-
howto-index.html	35.7 KB	-rw-rw-rw-
index.html	106.92 KB	-rw-rw-rw-
user-manual.html	261.1 KB	-rw-rw-rw-

Code Editor : git-gc.html

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<body class="manpage">
<div id="header">
<h1>git-gc(1) Manual Page</h1>
<h2 id="_name">NAME</h2>
<div class="sectionbody">
<p>git-gc - Cleanup unnecessary files and optimize the local repository</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>git gc</em> [--aggressive] [--auto] [--quiet] [--prune=&lt;date&gt; | --no-prune] [--force] [--keep-largest-pack]</pre>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Runs a number of housekeeping tasks within the current repository,
such as compressing file revisions (to reduce disk space and increase
performance), removing unreachable objects which may have been
created from prior invocations of <em>git add</em>, packing refs, pruning
reflog, rerere metadata or stale working trees. May also update ancillary
indexes such as the commit-graph.</p>
</div>
<div class="paragraph">
<p>When common porcelain operations that create objects are run, they
will check whether the repository has grown substantially since the
last maintenance, and if so run <code>git gc</code> automatically. See <code>gc.auto</code>
below for how to disable this behavior.</p>
</div>
<div class="paragraph">
<p>Running <code>git gc</code> manually should only be needed when adding objects to
a repository without regularly running such porcelain commands, to do
a one-off repository optimization, or e.g. to clean up a suboptimal
mass-import. See the "PACKFILE OPTIMIZATION" section in
<a href="git-fast-import.html">git-fast-import(1)</a> for more details on the import case.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist">
<dl>
<dt class="hdlist1">--aggressive</dt>
<dd>
<p>Usually <em>git gc</em> runs very quickly while providing good disk
space utilization and performance.  This option will cause
<em>git gc</em> to more aggressively optimize the repository at the expense
of taking much more time.  The effects of this optimization are
mostly persistent. See the "AGGRESSIVE" section below for details.</p>
</dd>
<dt class="hdlist1">--auto</dt>
<dd>
<p>With this option, <em>git gc</em> checks whether any housekeeping is
required; if not, it exits without performing any work.</p>
<div class="paragraph">
<p>See the <code>gc.auto</code> option in the "CONFIGURATION" section below for how
this heuristic works.</p>
</div>
<div class="paragraph">
<p>Once housekeeping is triggered by exceeding the limits of
configuration options such as <code>gc.auto</code> and <code>gc.autoPackLimit</code>, all
other housekeeping tasks (e.g. rerere, working trees, reflog&#8230;&#8203;) will
be performed as well.</p>
</div>
</dd>
<dt class="hdlist1">--cruft</dt>
<dd>
<p>When expiring unreachable objects, pack them separately into a
cruft pack instead of storing them as loose objects.</p>
</dd>
<dt class="hdlist1">--prune=&lt;date&gt;</dt>
<dd>
<p>Prune loose objects older than date (default is 2 weeks ago,
overridable by the config variable <code>gc.pruneExpire</code>).
--prune=now prunes loose objects regardless of their age and
increases the risk of corruption if another process is writing to
the repository concurrently; see "NOTES" below. --prune is on by
default.</p>
</dd>
<dt class="hdlist1">--no-prune</dt>
<dd>
<p>Do not prune any loose objects.</p>
</dd>
<dt class="hdlist1">--quiet</dt>
<dd>
<p>Suppress all progress reports.</p>
</dd>
<dt class="hdlist1">--force</dt>
<dd>
<p>Force <code>git gc</code> to run even if there may be another <code>git gc</code>
instance running on this repository.</p>
</dd>
<dt class="hdlist1">--keep-largest-pack</dt>
<dd>
<p>All packs except the largest pack and those marked with a
<code>.keep</code> files are consolidated into a single pack. When this
option is used, <code>gc.bigPackThreshold</code> is ignored.</p>
</dd>
</dl>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_aggressive">AGGRESSIVE</h2>
<div class="sectionbody">
<div class="paragraph">
<p>When the <code>--aggressive</code> option is supplied, <a href="git-repack.html">git-repack(1)</a> will
be invoked with the <code>-f</code> flag, which in turn will pass
<code>--no-reuse-delta</code> to <a href="git-pack-objects.html">git-pack-objects(1)</a>. This will throw
away any existing deltas and re-compute them, at the expense of
spending much more time on the repacking.</p>
</div>
<div class="paragraph">
<p>The effects of this are mostly persistent, e.g. when packs and loose
objects are coalesced into one another pack the existing deltas in
that pack might get re-used, but there are also various cases where we
might pick a sub-optimal delta from a newer pack instead.</p>
</div>
<div class="paragraph">
<p>Furthermore, supplying <code>--aggressive</code> will tweak the <code>--depth</code> and
<code>--window</code> options passed to <a href="git-repack.html">git-repack(1)</a>. See the
<code>gc.aggressiveDepth</code> and <code>gc.aggressiveWindow</code> settings below. By
using a larger window size we&#8217;re more likely to find more optimal
deltas.</p>
</div>
<div class="paragraph">
<p>It&#8217;s probably not worth it to use this option on a given repository
without running tailored performance benchmarks on it. It takes a lot
more time, and the resulting space/delta optimization may or may not
be worth it. Not using this at all is the right trade-off for most
users and their repositories.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_configuration">CONFIGURATION</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The below documentation is the same as what&#8217;s found in
<a href="git-config.html">git-config(1)</a>:</p>
</div>
<div class="dlist">
<dl>
<dt class="hdlist1">gc.aggressiveDepth</dt>
<dd>
<p>The depth parameter used in the delta compression
algorithm used by <em>git gc --aggressive</em>.  This defaults
to 50, which is the default for the <code>--depth</code> option when
<code>--aggressive</code> isn&#8217;t in use.</p>
<div class="paragraph">
<p>See the documentation for the <code>--depth</code> option in
<a href="git-repack.html">git-repack(1)</a> for more details.</p>
</div>
</dd>
<dt class="hdlist1">gc.aggressiveWindow</dt>
<dd>
<p>The window size parameter used in the delta compression
algorithm used by <em>git gc --aggressive</em>.  This defaults
to 250, which is a much more aggressive window size than
the default <code>--window</code> of 10.</p>
<div class="paragraph">
<p>See the documentation for the <code>--window</code> option in
<a href="git-repack.html">git-repack(1)</a> for more details.</p>
</div>
</dd>
<dt class="hdlist1">gc.auto</dt>
<dd>
<p>When there are approximately more than this many loose
objects in the repository, <code>git gc --auto</code> will pack them.
Some Porcelain commands use this command to perform a
light-weight garbage collection from time to time.  The
default value is 6700.</p>
<div class="paragraph">
<p>Setting this to 0 disables not only automatic packing based on the
number of loose objects, but any other heuristic <code>git gc --auto</code> will
otherwise use to determine if there&#8217;s work to do, such as
<code>gc.autoPackLimit</code>.</p>
</div>
</dd>
<dt class="hdlist1">gc.autoPackLimit</dt>
<dd>
<p>When there are more than this many packs that are not
marked with <code>*.keep</code> file in the repository, <code>git gc
--auto</code> consolidates them into one larger pack.  The
default value is 50.  Setting this to 0 disables it.
Setting <code>gc.auto</code> to 0 will also disable this.</p>
<div class="paragraph">
<p>See the <code>gc.bigPackThreshold</code> configuration variable below. When in
use, it&#8217;ll affect how the auto pack limit works.</p>
</div>
</dd>
<dt class="hdlist1">gc.autoDetach</dt>
<dd>
<p>Make <code>git gc --auto</code> return immediately and run in background
if the system supports it. Default is true.</p>
</dd>
<dt class="hdlist1">gc.bigPackThreshold</dt>
<dd>
<p>If non-zero, all packs larger than this limit are kept when
<code>git gc</code> is run. This is very similar to <code>--keep-largest-pack</code>
except that all packs that meet the threshold are kept, not
just the largest pack. Defaults to zero. Common unit suffixes of
<em>k</em>, <em>m</em>, or <em>g</em> are supported.</p>
<div class="paragraph">
<p>Note that if the number of kept packs is more than gc.autoPackLimit,
this configuration variable is ignored, all packs except the base pack
will be repacked. After this the number of packs should go below
gc.autoPackLimit and gc.bigPackThreshold should be respected again.</p>
</div>
<div class="paragraph">
<p>If the amount of memory estimated for <code>git repack</code> to run smoothly is
not available and <code>gc.bigPackThreshold</code> is not set, the largest pack
will also be excluded (this is the equivalent of running <code>git gc</code> with
<code>--keep-largest-pack</code>).</p>
</div>
</dd>
<dt class="hdlist1">gc.writeCommitGraph</dt>
<dd>
<p>If true, then gc will rewrite the commit-graph file when
<a href="git-gc.html">git-gc(1)</a> is run. When using <code>git gc --auto</code>
the commit-graph will be updated if housekeeping is
required. Default is true. See <a href="git-commit-graph.html">git-commit-graph(1)</a>
for details.</p>
</dd>
<dt class="hdlist1">gc.logExpiry</dt>
<dd>
<p>If the file gc.log exists, then <code>git gc --auto</code> will print
its content and exit with status zero instead of running
unless that file is more than <em>gc.logExpiry</em> old.  Default is
"1.day".  See <code>gc.pruneExpire</code> for more ways to specify its
value.</p>
</dd>
<dt class="hdlist1">gc.packRefs</dt>
<dd>
<p>Running <code>git pack-refs</code> in a repository renders it
unclonable by Git versions prior to 1.5.1.2 over dumb
transports such as HTTP.  This variable determines whether
<em>git gc</em> runs <code>git pack-refs</code>. This can be set to <code>notbare</code>
to enable it within all non-bare repos or it can be set to a
boolean value.  The default is <code>true</code>.</p>
</dd>
<dt class="hdlist1">gc.cruftPacks</dt>
<dd>
<p>Store unreachable objects in a cruft pack (see
<a href="git-repack.html">git-repack(1)</a>) instead of as loose objects. The default
is <code>false</code>.</p>
</dd>
<dt class="hdlist1">gc.pruneExpire</dt>
<dd>
<p>When <em>git gc</em> is run, it will call <em>prune --expire 2.weeks.ago</em>
(and <em>repack --cruft --cruft-expiration 2.weeks.ago</em> if using
cruft packs via <code>gc.cruftPacks</code> or <code>--cruft</code>).  Override the
grace period with this config variable.  The value "now" may be
used to disable this grace period and always prune unreachable
objects immediately, or "never" may be used to suppress pruning.
This feature helps prevent corruption when <em>git gc</em> runs
concurrently with another process writing to the repository; see
the "NOTES" section of <a href="git-gc.html">git-gc(1)</a>.</p>
</dd>
<dt class="hdlist1">gc.worktreePruneExpire</dt>
<dd>
<p>When <em>git gc</em> is run, it calls
<em>git worktree prune --expire 3.months.ago</em>.
This config variable can be used to set a different grace
period. The value "now" may be used to disable the grace
period and prune <code>$GIT_DIR/worktrees</code> immediately, or "never"
may be used to suppress pruning.</p>
</dd>
<dt class="hdlist1">gc.reflogExpire</dt>
<dt class="hdlist1">gc.&lt;pattern&gt;.reflogExpire</dt>
<dd>
<p><em>git reflog expire</em> removes reflog entries older than
this time; defaults to 90 days. The value "now" expires all
entries immediately, and "never" suppresses expiration
altogether. With "&lt;pattern&gt;" (e.g.
"refs/stash") in the middle the setting applies only to
the refs that match the &lt;pattern&gt;.</p>
</dd>
<dt class="hdlist1">gc.reflogExpireUnreachable</dt>
<dt class="hdlist1">gc.&lt;pattern&gt;.reflogExpireUnreachable</dt>
<dd>
<p><em>git reflog expire</em> removes reflog entries older than
this time and are not reachable from the current tip;
defaults to 30 days. The value "now" expires all entries
immediately, and "never" suppresses expiration altogether.
With "&lt;pattern&gt;" (e.g. "refs/stash")
in the middle, the setting applies only to the refs that
match the &lt;pattern&gt;.</p>
<div class="paragraph">
<p>These types of entries are generally created as a result of using <code>git
commit --amend</code> or <code>git rebase</code> and are the commits prior to the amend
or rebase occurring.  Since these changes are not part of the current
project most users will want to expire them sooner, which is why the
default is more aggressive than <code>gc.reflogExpire</code>.</p>
</div>
</dd>
<dt class="hdlist1">gc.rerereResolved</dt>
<dd>
<p>Records of conflicted merge you resolved earlier are
kept for this many days when <em>git rerere gc</em> is run.
You can also use more human-readable "1.month.ago", etc.
The default is 60 days.  See <a href="git-rerere.html">git-rerere(1)</a>.</p>
</dd>
<dt class="hdlist1">gc.rerereUnresolved</dt>
<dd>
<p>Records of conflicted merge you have not resolved are
kept for this many days when <em>git rerere gc</em> is run.
You can also use more human-readable "1.month.ago", etc.
The default is 15 days.  See <a href="git-rerere.html">git-rerere(1)</a>.</p>
</dd>
</dl>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_notes">NOTES</h2>
<div class="sectionbody">
<div class="paragraph">
<p><em>git gc</em> tries very hard not to delete objects that are referenced
anywhere in your repository. In particular, it will keep not only
objects referenced by your current set of branches and tags, but also
objects referenced by the index, remote-tracking branches, reflogs
(which may reference commits in branches that were later amended or
rewound), and anything else in the refs/* namespace. Note that a note
(of the kind created by <em>git notes</em>) attached to an object does not
contribute in keeping the object alive. If you are expecting some
objects to be deleted and they aren&#8217;t, check all of those locations
and decide whether it makes sense in your case to remove those
references.</p>
</div>
<div class="paragraph">
<p>On the other hand, when <em>git gc</em> runs concurrently with another process,
there is a risk of it deleting an object that the other process is using
but hasn&#8217;t created a reference to. This may just cause the other process
to fail or may corrupt the repository if the other process later adds a
reference to the deleted object. Git has two features that significantly
mitigate this problem:</p>
</div>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>Any object with modification time newer than the <code>--prune</code> date is kept,
along with everything reachable from it.</p>
</li>
<li>
<p>Most operations that add an object to the database update the
modification time of the object if it is already present so that #1
applies.</p>
</li>
</ol>
</div>
<div class="paragraph">
<p>However, these features fall short of a complete solution, so users who
run commands concurrently have to live with some risk of corruption (which
seems to be low in practice).</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_hooks">HOOKS</h2>
<div class="sectionbody">
<div class="paragraph">
<p>The <em>git gc --auto</em> command will run the <em>pre-auto-gc</em> hook.  See
<a href="githooks.html">githooks(5)</a> for more information.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph">
<p><a href="git-prune.html">git-prune(1)</a>
<a href="git-reflog.html">git-reflog(1)</a>
<a href="git-repack.html">git-repack(1)</a>
<a href="git-rerere.html">git-rerere(1)</a></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_git">GIT</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Part of the <a href="git.html">git(1)</a> suite</p>
</div>
</div>
</div>
</div>
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<div id="footer-text">
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