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git-gc - Cleanup unnecessary files and optimize the local repository
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Runs a number of housekeeping tasks within the current repository,
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such as compressing file revisions (to reduce disk space and increase
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performance) and removing unreachable objects which may have been
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created from prior invocations of gitlink:git-add[1].
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Users are encouraged to run this task on a regular basis within
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each repository to maintain good disk space utilization and good
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operating performance.
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Usually `git-gc` packs refs, expires old reflog entries,
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and removes old 'rerere' records. Removal
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of unreferenced loose objects is an unsafe operation
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while other git operations are in progress, so it is not
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done by default. Pass this option if you want it, and only
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when you know nobody else is creating new objects in the
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repository at the same time (e.g. never use this option
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The optional configuration variable 'gc.reflogExpire' can be
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set to indicate how long historical entries within each branch's
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reflog should remain available in this repository. The setting is
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expressed as a length of time, for example '90 days' or '3 months'.
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It defaults to '90 days'.
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The optional configuration variable 'gc.reflogExpireUnreachable'
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can be set to indicate how long historical reflog entries which
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are not part of the current branch should remain available in
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this repository. These types of entries are generally created as
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a result of using `git commit \--amend` or `git rebase` and are the
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commits prior to the amend or rebase occurring. Since these changes
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are not part of the current project most users will want to expire
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them sooner. This option defaults to '30 days'.
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The optional configuration variable 'gc.rerereresolved' indicates
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how long records of conflicted merge you resolved earlier are
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kept. This defaults to 60 days.
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The optional configuration variable 'gc.rerereunresolved' indicates
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how long records of conflicted merge you have not resolved are
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kept. This defaults to 15 days.
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The optional configuration variable 'gc.packrefs' determines if
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`git gc` runs `git-pack-refs`. Without the configuration, `git-pack-refs`
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is not run in bare repositories by default, to allow older dumb-transport
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clients fetch from the repository, but this will change in the future.
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Written by Shawn O. Pearce <spearce@spearce.org>
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Part of the gitlink:git[7] suite
added
removed
Documentation/git-gc.txt
