Cleanup unnecessary files and optimize the local repository
gitgc [ --aggressive] [ --auto] [ --quiet] [ --prune=<date> | --no -prune] [ --force] [ --keep -largest -pack]
--aggressive Usually gitgc runs very quickly while providing good disk space utilization and performance . This option will cause gitgc 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 .
--auto With this option, gitgc checks whether any housekeeping is required; if not, it exits without performing any work .
--prune=<date> Prune loose objects older than date (default is 2 weeks ago, overridable by the config variable gc.pruneExpire ). --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 .
--no -prune Do not prune any loose objects .
--quiet Suppress all progress reports .
--force Force gitgc to run even if there may be another gitgc instance running on this repository .
--keep -largest -pack All packs except the largest pack and those marked with a .keep files are consolidated into a single pack . When this option is used, gc.bigPackThreshold is ignored .
gc .aggressiveDepth The depth parameter used in the delta compression algorithm used by gitgc --aggressive . This defaults to 50, which is the default for the --depth option when --aggressive isn in use . See the documentation for the --depth option in git-repack (1) for more details .
gc .aggressiveWindow The window size parameter used in the delta compression algorithm used by gitgc --aggressive . This defaults to 250, which is a much more aggressive window size than the default --window of 10 . See the documentation for the --window option in git-repack (1) for more details .
gc .auto When there are approximately more than this many loose objects in the repository, gitgc --auto 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 . Setting this to 0 disables not only automatic packing based on the number of loose objects, but any other heuristic gitgc --auto will otherwise use to determine if there work to do, such as gc.autoPackLimit .
gc .autoPackLimit When there are more than this many packs that are not marked with *.keep file in the repository, gitgc --auto consolidates them into one larger pack . The default value is 50 . Setting this to 0 disables it . Setting gc.auto to 0 will also disable this . See the gc.bigPackThreshold configuration variable below . When in use, it affect how the auto pack limit works .
gc .autoDetach Make gitgc --auto return immediately and run in background if the system supports it . Default is true .
gc .bigPackThreshold If non -zero, all packs larger than this limit are kept when gitgc is run . This is very similar to --keep -base -pack except that all packs that meet the threshold are kept, not just the base pack . Defaults to zero . Common unit suffixes of k , m ,or g are supported . 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 . If the amount of memory estimated for gitrepack to run smoothly is not available and gc.bigPackThreshold is not set, the largest pack will also be excluded (this is the equivalent of running gitgc with --keep -base -pack ).
gc .writeCommitGraph If true, then gc will rewrite the commit -graph file when git-gc (1) is run . When using gitgc --auto the commit -graph will be updated if housekeeping is required . Default is false . See git-commit-graph (1) for details .
gc .logExpiry If the file gc .log exists, then gitgc --auto will print its content and exit with status zero instead of running unless that file is more than gc.logExpiry old . Default is "1 .day" . See gc.pruneExpire for more ways to specify its value .
gc .packRefs Running gitpack -refs 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 gitgc runs gitpack -refs . This can be set to notbare to enable it within all non -bare repos or it can be set to a boolean value . The default is true .
gc .pruneExpire When gitgc is run, it will call prune--expire 2 .weeks .ago . 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 gitgc runs concurrently with another process writing to the repository; see the "NOTES" section of git-gc (1).
gc .worktreePruneExpire When gitgc is run, it calls gitworktree prune --expire 3 .months .ago . 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 $GIT_DIR/worktrees immediately, or "never" may be used to suppress pruning .
gc .reflogExpire, gc .<pattern> .reflogExpire gitreflog expire removes reflog entries older than this time; defaults to 90 days . The value "now" expires all entries immediately, and "never" suppresses expiration altogether . With "<pattern>" (e .g . "refs/stash") in the middle the setting applies only to the refs that match the <pattern> .
gc .reflogExpireUnreachable, gc .<pattern> .reflogExpireUnreachable gitreflog expire 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 "<pattern>" (e .g . "refs/stash") in the middle, the setting applies only to the refs that match the <pattern> . These types of entries are generally created as a result of using gitcommit --amend or gitrebase 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 gc.reflogExpire .
gc .rerereResolved Records of conflicted merge you resolved earlier are kept for this many days when gitrerere gc is run . You can also use more human -readable "1 .month .ago", etc . The default is 60 days . See git-rerere (1).
gc .rerereUnresolved Records of conflicted merge you have not resolved are kept for this many days when gitrerere gc is run . You can also use more human -readable "1 .month .ago", etc . The default is 15 days . See git-rerere (1).
" 1." 4.2 Any object with modification time newer than the --prune date is kept, along with everything reachable from it . '-04' 2. '+01' .sp -1
" 2." 4.2 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 . 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) .