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    Command:

    git-gc

    
    
    

    SYNOPSIS

           git gc [--aggressive] [--auto] [--quiet] [--prune=<date> | --no-prune]
    
    
    

    DESCRIPTION

           Runs a number of housekeeping tasks within the current repository, such
           as compressing file revisions (to reduce disk space and increase
           performance) and removing unreachable objects which may have been
           created from prior invocations of git add.
    
           Users are encouraged to run this task on a regular basis within each
           repository to maintain good disk space utilization and good operating
           performance.
    
           Some git commands may automatically run git gc; see the --auto flag
           below for details. If you know what you're doing and all you want is to
           disable this behavior permanently without further considerations, just
           do:
    
               $ git config --global gc.auto 0
    
    
    

    OPTIONS

           --aggressive
               Usually git gc runs very quickly while providing good disk space
               utilization and performance. This option will cause git gc to more
               aggressively optimize the repository at the expense of taking much
               more time. The effects of this optimization are persistent, so this
               option only needs to be used occasionally; every few hundred
               changesets or so.
    
           --auto
               With this option, git gc checks whether any housekeeping is
               required; if not, it exits without performing any work. Some git
               commands run git gc --auto after performing operations that could
               create many loose objects.
    
               Housekeeping is required if there are too many loose objects or too
               many packs in the repository. If the number of loose objects
               exceeds the value of the gc.auto configuration variable, then all
               loose objects are combined into a single pack using git repack -d
               -l. Setting the value of gc.auto to 0 disables automatic packing of
               loose objects.
    
               If the number of packs exceeds the value of gc.autopacklimit, then
               existing packs (except those marked with a .keep file) are
               consolidated into a single pack by using the -A option of git
               repack. Setting gc.autopacklimit to 0 disables automatic
               consolidation of packs.
    
           --prune=<date>
               Prune loose objects older than date (default is 2 weeks ago,
               overridable by the config variable gc.pruneExpire). This option is
    
           The optional configuration variable gc.reflogExpireUnreachable can be
           set to indicate how long historical reflog entries which are not part
           of the current branch should remain available in this repository. These
           types of entries are generally created as a result of using git commit
           --amend or git rebase 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. This option defaults to 30 days.
    
           The optional configuration variable gc.rerereresolved indicates how
           long records of conflicted merge you resolved earlier are kept. This
           defaults to 60 days.
    
           The optional configuration variable gc.rerereunresolved indicates how
           long records of conflicted merge you have not resolved are kept. This
           defaults to 15 days.
    
           The optional configuration variable gc.packrefs determines if git gc
           runs git pack-refs. This can be set to "nobare" to enable it within all
           non-bare repos or it can be set to a boolean value. This defaults to
           true.
    
           The optional configuration variable gc.aggressiveWindow controls how
           much time is spent optimizing the delta compression of the objects in
           the repository when the --aggressive option is specified. The larger
           the value, the more time is spent optimizing the delta compression. See
           the documentation for the --window? option in git-repack(1) for more
           details. This defaults to 250.
    
           The optional configuration variable gc.pruneExpire controls how old the
           unreferenced loose objects have to be before they are pruned. The
           default is "2 weeks ago".
    
    
    

    NOTES

           git gc tries very hard to be safe about the garbage it collects. 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, refs saved by git filter-branch in
           refs/original/, or reflogs (which may reference commits in branches
           that were later amended or rewound).
    
           If you are expecting some objects to be collected and they aren't,
           check all of those locations and decide whether it makes sense in your
           case to remove those references.
    
    
    

    SEE ALSO

           git-prune(1) git-reflog(1) git-repack(1) git-rerere(1)
    
    
    

    AUTHOR

           Written by Shawn O. Pearce <spearce@spearce.org[1]>
    
    
    

    GIT

    
    
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