6 git-gc - Cleanup unnecessary files and optimize the local repository
11 'git-gc' [--prune] [--aggressive] [--auto] [--quiet]
15 Runs a number of housekeeping tasks within the current repository,
16 such as compressing file revisions (to reduce disk space and increase
17 performance) and removing unreachable objects which may have been
18 created from prior invocations of linkgit:git-add[1].
20 Users are encouraged to run this task on a regular basis within
21 each repository to maintain good disk space utilization and good
22 operating performance. Some git commands may automatically run
23 `git-gc`; see the `--auto` flag below for details.
29 Usually `git-gc` packs refs, expires old reflog entries,
31 and removes old 'rerere' records. Removal
32 of unreferenced loose objects is an unsafe operation
33 while other git operations are in progress, so it is not
34 done by default. Pass this option if you want it, and only
35 when you know nobody else is creating new objects in the
36 repository at the same time (e.g. never use this option
40 Usually 'git-gc' runs very quickly while providing good disk
41 space utilization and performance. This option will cause
42 git-gc to more aggressively optimize the repository at the expense
43 of taking much more time. The effects of this optimization are
44 persistent, so this option only needs to be used occasionally; every
45 few hundred changesets or so.
48 With this option, `git gc` checks whether any housekeeping is
49 required; if not, it exits without performing any work.
50 Some git commands run `git gc --auto` after performing
51 operations that could create many loose objects.
53 Housekeeping is required if there are too many loose objects or
54 too many packs in the repository. If the number of loose objects
55 exceeds the value of the `gc.auto` configuration variable, then
56 all loose objects are combined into a single pack using
57 `git-repack -d -l`. Setting the value of `gc.auto` to 0
58 disables automatic packing of loose objects.
60 If the number of packs exceeds the value of `gc.autopacklimit`,
61 then existing packs (except those marked with a `.keep` file)
62 are consolidated into a single pack by using the `-A` option of
63 `git-repack`. Setting `gc.autopacklimit` to 0 disables
64 automatic consolidation of packs.
67 Suppress all progress reports.
72 The optional configuration variable 'gc.reflogExpire' can be
73 set to indicate how long historical entries within each branch's
74 reflog should remain available in this repository. The setting is
75 expressed as a length of time, for example '90 days' or '3 months'.
76 It defaults to '90 days'.
78 The optional configuration variable 'gc.reflogExpireUnreachable'
79 can be set to indicate how long historical reflog entries which
80 are not part of the current branch should remain available in
81 this repository. These types of entries are generally created as
82 a result of using `git commit \--amend` or `git rebase` and are the
83 commits prior to the amend or rebase occurring. Since these changes
84 are not part of the current project most users will want to expire
85 them sooner. This option defaults to '30 days'.
87 The optional configuration variable 'gc.rerereresolved' indicates
88 how long records of conflicted merge you resolved earlier are
89 kept. This defaults to 60 days.
91 The optional configuration variable 'gc.rerereunresolved' indicates
92 how long records of conflicted merge you have not resolved are
93 kept. This defaults to 15 days.
95 The optional configuration variable 'gc.packrefs' determines if
96 `git gc` runs `git-pack-refs`. This can be set to "nobare" to enable
97 it within all non-bare repos or it can be set to a boolean value.
98 This defaults to true.
100 The optional configuration variable 'gc.aggressiveWindow' controls how
101 much time is spent optimizing the delta compression of the objects in
102 the repository when the --aggressive option is specified. The larger
103 the value, the more time is spent optimizing the delta compression. See
104 the documentation for the --window' option in linkgit:git-repack[1] for
105 more details. This defaults to 10.
110 linkgit:git-reflog[1]
111 linkgit:git-repack[1]
112 linkgit:git-rerere[1]
116 Written by Shawn O. Pearce <spearce@spearce.org>
120 Part of the linkgit:git[7] suite