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git-maintenance(1)
==================

NAME
----
git-maintenance - Run tasks to optimize Git repository data


SYNOPSIS
--------
[verse]
'git maintenance' run [<options>]


DESCRIPTION
-----------
Run tasks to optimize Git repository data, speeding up other Git commands
and reducing storage requirements for the repository.

Git commands that add repository data, such as `git add` or `git fetch`,
are optimized for a responsive user experience. These commands do not take
time to optimize the Git data, since such optimizations scale with the full
size of the repository while these user commands each perform a relatively
small action.

The `git maintenance` command provides flexibility for how to optimize the
Git repository.

SUBCOMMANDS
-----------

run::
	Run one or more maintenance tasks. If one or more `--task` options
	are specified, then those tasks are run in that order. Otherwise,
	the tasks are determined by which `maintenance.<task>.enabled`
	config options are true. By default, only `maintenance.gc.enabled`
	is true.

TASKS
-----

commit-graph::
	The `commit-graph` job updates the `commit-graph` files incrementally,
	then verifies that the written data is correct. If the new layer has an
	issue, then the chain file is removed and the `commit-graph` is
	rewritten from scratch.
+
The incremental write is safe to run alongside concurrent Git processes
since it will not expire `.graph` files that were in the previous
`commit-graph-chain` file. They will be deleted by a later run based on
the expiration delay.

prefetch::
	The `prefetch` task updates the object directory with the latest
	objects from all registered remotes. For each remote, a `git fetch`
	command is run. The refmap is custom to avoid updating local or remote
	branches (those in `refs/heads` or `refs/remotes`). Instead, the
	remote refs are stored in `refs/prefetch/<remote>/`. Also, tags are
	not updated.
+
This is done to avoid disrupting the remote-tracking branches. The end users
expect these refs to stay unmoved unless they initiate a fetch.  With prefetch
task, however, the objects necessary to complete a later real fetch would
already be obtained, so the real fetch would go faster.  In the ideal case,
it will just become an update to bunch of remote-tracking branches without
any object transfer.

gc::
	Clean up unnecessary files and optimize the local repository. "GC"
	stands for "garbage collection," but this task performs many
	smaller tasks. This task can be expensive for large repositories,
	as it repacks all Git objects into a single pack-file. It can also
	be disruptive in some situations, as it deletes stale data. See
	linkgit:git-gc[1] for more details on garbage collection in Git.

OPTIONS
-------
--auto::
	When combined with the `run` subcommand, run maintenance tasks
	only if certain thresholds are met. For example, the `gc` task
	runs when the number of loose objects exceeds the number stored
	in the `gc.auto` config setting, or when the number of pack-files
	exceeds the `gc.autoPackLimit` config setting.

--quiet::
	Do not report progress or other information over `stderr`.

--task=<task>::
	If this option is specified one or more times, then only run the
	specified tasks in the specified order.

GIT
---
Part of the linkgit:git[1] suite
debug log:

solving e82799ccff ...
found e82799ccff in https://public-inbox.org/git/8779c6c20d7e25e13189074dbd57a86b49ec56e9.1597760730.git.gitgitgadget@gmail.com/
found 9af08c644f in https://public-inbox.org/git/5c0f9d69d18d51f19fcd76fca647c1df6711d70f.1597760589.git.gitgitgadget@gmail.com/
found cf59eb258c in https://public-inbox.org/git/85268bd53ef7f4e7b3d97a8ae091290e8e74441d.1597760589.git.gitgitgadget@gmail.com/
found c816fa1dcd in https://public-inbox.org/git/50b457fd57aef4e9ac6a15549561936dc962ef36.1597760589.git.gitgitgadget@gmail.com/
found 04fa0fe329 in git.git.git
preparing index
index prepared:
100644 04fa0fe3298e7793bf0f865c5dccbb500d09bf20	Documentation/git-maintenance.txt

applying [1/4] https://public-inbox.org/git/50b457fd57aef4e9ac6a15549561936dc962ef36.1597760589.git.gitgitgadget@gmail.com/
diff --git a/Documentation/git-maintenance.txt b/Documentation/git-maintenance.txt
index 04fa0fe329..c816fa1dcd 100644


applying [2/4] https://public-inbox.org/git/85268bd53ef7f4e7b3d97a8ae091290e8e74441d.1597760589.git.gitgitgadget@gmail.com/
diff --git a/Documentation/git-maintenance.txt b/Documentation/git-maintenance.txt
index c816fa1dcd..cf59eb258c 100644


applying [3/4] https://public-inbox.org/git/5c0f9d69d18d51f19fcd76fca647c1df6711d70f.1597760589.git.gitgitgadget@gmail.com/
diff --git a/Documentation/git-maintenance.txt b/Documentation/git-maintenance.txt
index cf59eb258c..9af08c644f 100644


applying [4/4] https://public-inbox.org/git/8779c6c20d7e25e13189074dbd57a86b49ec56e9.1597760730.git.gitgitgadget@gmail.com/
diff --git a/Documentation/git-maintenance.txt b/Documentation/git-maintenance.txt
index 9af08c644f..e82799ccff 100644

Checking patch Documentation/git-maintenance.txt...
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Checking patch Documentation/git-maintenance.txt...
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Applied patch Documentation/git-maintenance.txt cleanly.

index at:
100644 e82799ccff0bcd1c8f22c4cbeb7cf079e3852d4b	Documentation/git-maintenance.txt

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