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| </head> |
| <body class="manpage"> |
| <div id="header"> |
| <h1>git-maintenance(1) Manual Page</h1> |
| <h2 id="_name">NAME</h2> |
| <div class="sectionbody"> |
| <p>git-maintenance - Run tasks to optimize Git repository data</p> |
| </div> |
| </div> |
| <div id="content"> |
| <div class="sect1"> |
| <h2 id="_synopsis">SYNOPSIS</h2> |
| <div class="sectionbody"> |
| <div class="verseblock"> |
| <pre class="content"><em>git maintenance</em> run [<options>] |
| <em>git maintenance</em> start [--scheduler=<scheduler>] |
| <em>git maintenance</em> (stop|register|unregister) [<options>]</pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_description">DESCRIPTION</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Run tasks to optimize Git repository data, speeding up other Git commands |
| and reducing storage requirements for the repository.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Git commands that add repository data, such as <code>git</code> <code>add</code> or <code>git</code> <code>fetch</code>, |
| 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.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The <code>git</code> <code>maintenance</code> command provides flexibility for how to optimize the |
| Git repository.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_subcommands">SUBCOMMANDS</h2> |
| <div class="sectionbody"> |
| <div class="dlist"> |
| <dl> |
| <dt class="hdlist1">run</dt> |
| <dd> |
| <p>Run one or more maintenance tasks. If one or more <code>--task</code> options |
| are specified, then those tasks are run in that order. Otherwise, |
| the tasks are determined by which <code>maintenance.</code><em><task></em><code>.enabled</code> |
| config options are true. By default, only <code>maintenance.gc.enabled</code> |
| is true.</p> |
| </dd> |
| <dt class="hdlist1">start</dt> |
| <dd> |
| <p>Start running maintenance on the current repository. This performs |
| the same config updates as the <code>register</code> subcommand, then updates |
| the background scheduler to run <code>git</code> <code>maintenance</code> <code>run</code> <code>--scheduled</code> |
| on an hourly basis.</p> |
| </dd> |
| <dt class="hdlist1">stop</dt> |
| <dd> |
| <p>Halt the background maintenance schedule. The current repository |
| is not removed from the list of maintained repositories, in case |
| the background maintenance is restarted later.</p> |
| </dd> |
| <dt class="hdlist1">register</dt> |
| <dd> |
| <p>Initialize Git config values so any scheduled maintenance will start |
| running on this repository. This adds the repository to the |
| <code>maintenance.repo</code> config variable in the current user’s global config, |
| or the config specified by --config-file option, and enables some |
| recommended configuration values for <code>maintenance.</code><em><task></em><code>.schedule</code>. The |
| tasks that are enabled are safe for running in the background without |
| disrupting foreground processes.</p> |
| <div class="paragraph"> |
| <p>The <code>register</code> subcommand will also set the <code>maintenance.strategy</code> config |
| value to <code>incremental</code>, if this value is not previously set. The |
| <code>incremental</code> strategy uses the following schedule for each maintenance |
| task:</p> |
| </div> |
| <div class="openblock"> |
| <div class="content"> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><code>gc</code>: disabled.</p> |
| </li> |
| <li> |
| <p><code>commit-graph</code>: hourly.</p> |
| </li> |
| <li> |
| <p><code>prefetch</code>: hourly.</p> |
| </li> |
| <li> |
| <p><code>loose-objects</code>: daily.</p> |
| </li> |
| <li> |
| <p><code>incremental-repack</code>: daily.</p> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p><code>git</code> <code>maintenance</code> <code>register</code> will also disable foreground maintenance by |
| setting <code>maintenance.auto</code> <code>=</code> <code>false</code> in the current repository. This config |
| setting will remain after a <code>git</code> <code>maintenance</code> <code>unregister</code> command.</p> |
| </div> |
| </dd> |
| <dt class="hdlist1">unregister</dt> |
| <dd> |
| <p>Remove the current repository from background maintenance. This |
| only removes the repository from the configured list. It does not |
| stop the background maintenance processes from running.</p> |
| <div class="paragraph"> |
| <p>The <code>unregister</code> subcommand will report an error if the current repository |
| is not already registered. Use the <code>--force</code> option to return success even |
| when the current repository is not registered.</p> |
| </div> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_tasks">TASKS</h2> |
| <div class="sectionbody"> |
| <div class="dlist"> |
| <dl> |
| <dt class="hdlist1">commit-graph</dt> |
| <dd> |
| <p>The <code>commit-graph</code> job updates the <code>commit-graph</code> files incrementally, |
| then verifies that the written data is correct. The incremental |
| write is safe to run alongside concurrent Git processes since it |
| will not expire .<code>graph</code> files that were in the previous |
| <code>commit-graph-chain</code> file. They will be deleted by a later run based |
| on the expiration delay.</p> |
| </dd> |
| <dt class="hdlist1">prefetch</dt> |
| <dd> |
| <p>The <code>prefetch</code> task updates the object directory with the latest |
| objects from all registered remotes. For each remote, a <code>git</code> <code>fetch</code> |
| command is run. The configured refspec is modified to place all |
| requested refs within <code>refs/prefetch/</code>. Also, tags are not updated.</p> |
| <div class="paragraph"> |
| <p>This is done to avoid disrupting the remote-tracking branches. The end users |
| expect these refs to stay unmoved unless they initiate a fetch. However, |
| with the prefetch task, the objects necessary to complete a later real fetch |
| would already be obtained, making the real fetch faster. In the ideal case, |
| it will just become an update to a bunch of remote-tracking branches without |
| any object transfer.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The <code>remote.</code><em><name></em><code>.skipFetchAll</code> configuration can be used to |
| exclude a particular remote from getting prefetched.</p> |
| </div> |
| </dd> |
| <dt class="hdlist1">gc</dt> |
| <dd> |
| <p>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 |
| <a href="git-gc.html">git-gc(1)</a> for more details on garbage collection in Git.</p> |
| </dd> |
| <dt class="hdlist1">loose-objects</dt> |
| <dd> |
| <p>The <code>loose-objects</code> job cleans up loose objects and places them into |
| pack-files. In order to prevent race conditions with concurrent Git |
| commands, it follows a two-step process. First, it deletes any loose |
| objects that already exist in a pack-file; concurrent Git processes |
| will examine the pack-file for the object data instead of the loose |
| object. Second, it creates a new pack-file (starting with "loose-") |
| containing a batch of loose objects.</p> |
| <div class="paragraph"> |
| <p>The batch size defaults to fifty thousand objects to prevent the job from |
| taking too long on a repository with many loose objects. Use the |
| <code>maintenance.loose-objects.batchSize</code> config option to adjust this size, |
| including a value of <code>0</code> to remove the limit.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The <code>gc</code> task writes unreachable objects as loose objects to be cleaned up |
| by a later step only if they are not re-added to a pack-file; for this |
| reason it is not advisable to enable both the <code>loose-objects</code> and <code>gc</code> |
| tasks at the same time.</p> |
| </div> |
| </dd> |
| <dt class="hdlist1">incremental-repack</dt> |
| <dd> |
| <p>The <code>incremental-repack</code> job repacks the object directory |
| using the <code>multi-pack-index</code> feature. In order to prevent race |
| conditions with concurrent Git commands, it follows a two-step |
| process. First, it calls <code>git</code> <code>multi-pack-index</code> <code>expire</code> to delete |
| pack-files unreferenced by the <code>multi-pack-index</code> file. Second, it |
| calls <code>git</code> <code>multi-pack-index</code> <code>repack</code> to select several small |
| pack-files and repack them into a bigger one, and then update the |
| <code>multi-pack-index</code> entries that refer to the small pack-files to |
| refer to the new pack-file. This prepares those small pack-files |
| for deletion upon the next run of <code>git</code> <code>multi-pack-index</code> <code>expire</code>. |
| The selection of the small pack-files is such that the expected |
| size of the big pack-file is at least the batch size; see the |
| <code>--batch-size</code> option for the <code>repack</code> subcommand in |
| <a href="git-multi-pack-index.html">git-multi-pack-index(1)</a>. The default batch-size is zero, |
| which is a special case that attempts to repack all pack-files |
| into a single pack-file.</p> |
| </dd> |
| <dt class="hdlist1">pack-refs</dt> |
| <dd> |
| <p>The <code>pack-refs</code> task collects the loose reference files and |
| collects them into a single file. This speeds up operations that |
| need to iterate across many references. See <a href="git-pack-refs.html">git-pack-refs(1)</a> |
| for more information.</p> |
| </dd> |
| <dt class="hdlist1">reflog-expire</dt> |
| <dd> |
| <p>The <code>reflog-expire</code> task deletes any entries in the reflog older than the |
| expiry threshold. See <a href="git-reflog.html">git-reflog(1)</a> for more information.</p> |
| </dd> |
| <dt class="hdlist1">rerere-gc</dt> |
| <dd> |
| <p>The <code>rerere-gc</code> task invokes garbage collection for stale entries in |
| the rerere cache. See <a href="git-rerere.html">git-rerere(1)</a> for more information.</p> |
| </dd> |
| <dt class="hdlist1">worktree-prune</dt> |
| <dd> |
| <p>The <code>worktree-prune</code> task deletes stale or broken worktrees. See |
| <a href="git-worktree.html">git-worktree(1)</a> for more information.</p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_options">OPTIONS</h2> |
| <div class="sectionbody"> |
| <div class="dlist"> |
| <dl> |
| <dt class="hdlist1">--auto</dt> |
| <dd> |
| <p>When combined with the <code>run</code> subcommand, run maintenance tasks |
| only if certain thresholds are met. For example, the <code>gc</code> task |
| runs when the number of loose objects exceeds the number stored |
| in the <code>gc.auto</code> config setting, or when the number of pack-files |
| exceeds the <code>gc.autoPackLimit</code> config setting. Not compatible with |
| the <code>--schedule</code> option.</p> |
| </dd> |
| <dt class="hdlist1">--schedule</dt> |
| <dd> |
| <p>When combined with the <code>run</code> subcommand, run maintenance tasks |
| only if certain time conditions are met, as specified by the |
| <code>maintenance.</code><em><task></em><code>.schedule</code> config value for each <em><task></em>. |
| This config value specifies a number of seconds since the last |
| time that task ran, according to the <code>maintenance.</code><em><task></em><code>.lastRun</code> |
| config value. The tasks that are tested are those provided by |
| the <code>--task=</code><em><task></em> option(s) or those with |
| <code>maintenance.</code><em><task></em><code>.enabled</code> set to true.</p> |
| </dd> |
| <dt class="hdlist1">--quiet</dt> |
| <dd> |
| <p>Do not report progress or other information over <code>stderr</code>.</p> |
| </dd> |
| <dt class="hdlist1">--task=<task></dt> |
| <dd> |
| <p>If this option is specified one or more times, then only run the |
| specified tasks in the specified order. If no <code>--task=</code><em><task></em> |
| arguments are specified, then only the tasks with |
| <code>maintenance.</code><em><task></em><code>.enabled</code> configured as <code>true</code> are considered. |
| See the <em>TASKS</em> section for the list of accepted <em><task></em> values.</p> |
| </dd> |
| <dt class="hdlist1">--scheduler=auto|crontab|systemd-timer|launchctl|schtasks</dt> |
| <dd> |
| <p>When combined with the <code>start</code> subcommand, specify the scheduler |
| for running the hourly, daily and weekly executions of |
| <code>git</code> <code>maintenance</code> <code>run</code>. |
| Possible values for <em><scheduler></em> are <code>auto</code>, <code>crontab</code> |
| (POSIX), <code>systemd-timer</code> (Linux), <code>launchctl</code> (macOS), and |
| <code>schtasks</code> (Windows). When <code>auto</code> is specified, the |
| appropriate platform-specific scheduler is used; on Linux, |
| <code>systemd-timer</code> is used if available, otherwise |
| <code>crontab</code>. Default is <code>auto</code>.</p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_troubleshooting">TROUBLESHOOTING</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>The <code>git</code> <code>maintenance</code> command is designed to simplify the repository |
| maintenance patterns while minimizing user wait time during Git commands. |
| A variety of configuration options are available to allow customizing this |
| process. The default maintenance options focus on operations that complete |
| quickly, even on large repositories.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Users may find some cases where scheduled maintenance tasks do not run as |
| frequently as intended. Each <code>git</code> <code>maintenance</code> <code>run</code> command takes a lock on |
| the repository’s object database, and this prevents other concurrent |
| <code>git</code> <code>maintenance</code> <code>run</code> commands from running on the same repository. Without |
| this safeguard, competing processes could leave the repository in an |
| unpredictable state.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The background maintenance schedule runs <code>git</code> <code>maintenance</code> <code>run</code> processes |
| on an hourly basis. Each run executes the "hourly" tasks. At midnight, |
| that process also executes the "daily" tasks. At midnight on the first day |
| of the week, that process also executes the "weekly" tasks. A single |
| process iterates over each registered repository, performing the scheduled |
| tasks for that frequency. The processes are scheduled to a random minute of |
| the hour per client to spread out the load that multiple clients might |
| generate (e.g. from prefetching). Depending on the number of registered |
| repositories and their sizes, this process may take longer than an hour. |
| In this case, multiple <code>git</code> <code>maintenance</code> <code>run</code> commands may run on the same |
| repository at the same time, colliding on the object database lock. This |
| results in one of the two tasks not running.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If you find that some maintenance windows are taking longer than one hour |
| to complete, then consider reducing the complexity of your maintenance |
| tasks. For example, the <code>gc</code> task is much slower than the |
| <code>incremental-repack</code> task. However, this comes at a cost of a slightly |
| larger object database. Consider moving more expensive tasks to be run |
| less frequently.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Expert users may consider scheduling their own maintenance tasks using a |
| different schedule than is available through <code>git</code> <code>maintenance</code> <code>start</code> and |
| Git configuration options. These users should be aware of the object |
| database lock and how concurrent <code>git</code> <code>maintenance</code> <code>run</code> commands behave. |
| Further, the <code>git</code> <code>gc</code> command should not be combined with |
| <code>git</code> <code>maintenance</code> <code>run</code> commands. <code>git</code> <code>gc</code> modifies the object database |
| but does not take the lock in the same way as <code>git</code> <code>maintenance</code> <code>run</code>. If |
| possible, use <code>git</code> <code>maintenance</code> <code>run</code> <code>--task=gc</code> instead of <code>git</code> <code>gc</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The following sections describe the mechanisms put in place to run |
| background maintenance by <code>git</code> <code>maintenance</code> <code>start</code> and how to customize |
| them.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_background_maintenance_on_posix_systems">BACKGROUND MAINTENANCE ON POSIX SYSTEMS</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>The standard mechanism for scheduling background tasks on POSIX systems |
| is cron(8). This tool executes commands based on a given schedule. The |
| current list of user-scheduled tasks can be found by running <code>crontab</code> <code>-l</code>. |
| The schedule written by <code>git</code> <code>maintenance</code> <code>start</code> is similar to this:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre># BEGIN GIT MAINTENANCE SCHEDULE |
| # The following schedule was created by Git |
| # Any edits made in this region might be |
| # replaced in the future by a Git command. |
| |
| 0 1-23 * * * "/<path>/git" --exec-path="/<path>" for-each-repo --config=maintenance.repo maintenance run --schedule=hourly |
| 0 0 * * 1-6 "/<path>/git" --exec-path="/<path>" for-each-repo --config=maintenance.repo maintenance run --schedule=daily |
| 0 0 * * 0 "/<path>/git" --exec-path="/<path>" for-each-repo --config=maintenance.repo maintenance run --schedule=weekly |
| |
| # END GIT MAINTENANCE SCHEDULE</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>The comments are used as a region to mark the schedule as written by Git. |
| Any modifications within this region will be completely deleted by |
| <code>git</code> <code>maintenance</code> <code>stop</code> or overwritten by <code>git</code> <code>maintenance</code> <code>start</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The <code>crontab</code> entry specifies the full path of the <code>git</code> executable to |
| ensure that the executed <code>git</code> command is the same one with which |
| <code>git</code> <code>maintenance</code> <code>start</code> was issued independent of <code>PATH</code>. If the same user |
| runs <code>git</code> <code>maintenance</code> <code>start</code> with multiple Git executables, then only the |
| latest executable is used.</p> |
| </div> |
| <div class="paragraph"> |
| <p>These commands use <code>git</code> <code>for-each-repo</code> <code>--config=maintenance.repo</code> to run |
| <code>git</code> <code>maintenance</code> <code>run</code> <code>--schedule=</code><em><frequency></em> on each repository listed in |
| the multi-valued <code>maintenance.repo</code> config option. These are typically |
| loaded from the user-specific global config. The <code>git</code> <code>maintenance</code> process |
| then determines which maintenance tasks are configured to run on each |
| repository with each <em><frequency></em> using the <code>maintenance.</code><em><task></em><code>.schedule</code> |
| config options. These values are loaded from the global or repository |
| config values.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If the config values are insufficient to achieve your desired background |
| maintenance schedule, then you can create your own schedule. If you run |
| <code>crontab</code> <code>-e</code>, then an editor will load with your user-specific <code>cron</code> |
| schedule. In that editor, you can add your own schedule lines. You could |
| start by adapting the default schedule listed earlier, or you could read |
| the crontab(5) documentation for advanced scheduling techniques. Please |
| do use the full path and <code>--exec-path</code> techniques from the default |
| schedule to ensure you are executing the correct binaries in your |
| schedule.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_background_maintenance_on_linux_systemd_systems">BACKGROUND MAINTENANCE ON LINUX SYSTEMD SYSTEMS</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>While Linux supports <code>cron</code>, depending on the distribution, <code>cron</code> may |
| be an optional package not necessarily installed. On modern Linux |
| distributions, systemd timers are superseding it.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If user systemd timers are available, they will be used as a replacement |
| of <code>cron</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>In this case, <code>git</code> <code>maintenance</code> <code>start</code> will create user systemd timer units |
| and start the timers. The current list of user-scheduled tasks can be found |
| by running <code>systemctl</code> <code>--user</code> <code>list-timers</code>. The timers written by <code>git</code> |
| <code>maintenance</code> <code>start</code> are similar to this:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>$ systemctl --user list-timers |
| NEXT LEFT LAST PASSED UNIT ACTIVATES |
| Thu 2021-04-29 19:00:00 CEST 42min left Thu 2021-04-29 18:00:11 CEST 17min ago git-maintenance@hourly.timer git-maintenance@hourly.service |
| Fri 2021-04-30 00:00:00 CEST 5h 42min left Thu 2021-04-29 00:00:11 CEST 18h ago git-maintenance@daily.timer git-maintenance@daily.service |
| Mon 2021-05-03 00:00:00 CEST 3 days left Mon 2021-04-26 00:00:11 CEST 3 days ago git-maintenance@weekly.timer git-maintenance@weekly.service</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>One timer is registered for each <code>--schedule=</code><em><frequency></em> option.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The definition of the systemd units can be inspected in the following files:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>~/.config/systemd/user/git-maintenance@.timer |
| ~/.config/systemd/user/git-maintenance@.service |
| ~/.config/systemd/user/timers.target.wants/git-maintenance@hourly.timer |
| ~/.config/systemd/user/timers.target.wants/git-maintenance@daily.timer |
| ~/.config/systemd/user/timers.target.wants/git-maintenance@weekly.timer</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p><code>git</code> <code>maintenance</code> <code>start</code> will overwrite these files and start the timer |
| again with <code>systemctl</code> <code>--user</code>, so any customization should be done by |
| creating a drop-in file, i.e. a .<code>conf</code> suffixed file in the |
| <code>~/.config/systemd/user/git-maintenance@.service.d</code> directory.</p> |
| </div> |
| <div class="paragraph"> |
| <p><code>git</code> <code>maintenance</code> <code>stop</code> will stop the user systemd timers and delete |
| the above mentioned files.</p> |
| </div> |
| <div class="paragraph"> |
| <p>For more details, see <code>systemd.timer</code>(<code>5</code>).</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_background_maintenance_on_macos_systems">BACKGROUND MAINTENANCE ON MACOS SYSTEMS</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>While macOS technically supports <code>cron</code>, using <code>crontab</code> <code>-e</code> requires |
| elevated privileges and the executed process does not have a full user |
| context. Without a full user context, Git and its credential helpers |
| cannot access stored credentials, so some maintenance tasks are not |
| functional.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Instead, <code>git</code> <code>maintenance</code> <code>start</code> interacts with the <code>launchctl</code> tool, |
| which is the recommended way to schedule timed jobs in macOS. Scheduling |
| maintenance through <code>git</code> <code>maintenance</code> (<code>start</code>|<code>stop</code>) requires some |
| <code>launchctl</code> features available only in macOS 10.11 or later.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Your user-specific scheduled tasks are stored as XML-formatted .<code>plist</code> |
| files in <code>~/Library/LaunchAgents/</code>. You can see the currently-registered |
| tasks using the following command:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre>$ ls ~/Library/LaunchAgents/org.git-scm.git* |
| org.git-scm.git.daily.plist |
| org.git-scm.git.hourly.plist |
| org.git-scm.git.weekly.plist</pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>One task is registered for each <code>--schedule=</code><em><frequency></em> option. To |
| inspect how the XML format describes each schedule, open one of these |
| .<code>plist</code> files in an editor and inspect the <em><array></em> element following |
| the <em><key></em><code>StartCalendarInterval</code></key> element.</p> |
| </div> |
| <div class="paragraph"> |
| <p><code>git</code> <code>maintenance</code> <code>start</code> will overwrite these files and register the |
| tasks again with <code>launchctl</code>, so any customizations should be done by |
| creating your own .<code>plist</code> files with distinct names. Similarly, the |
| <code>git</code> <code>maintenance</code> <code>stop</code> command will unregister the tasks with <code>launchctl</code> |
| and delete the .<code>plist</code> files.</p> |
| </div> |
| <div class="paragraph"> |
| <p>To create more advanced customizations to your background tasks, see |
| launchctl.plist(5) for more information.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_background_maintenance_on_windows_systems">BACKGROUND MAINTENANCE ON WINDOWS SYSTEMS</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Windows does not support <code>cron</code> and instead has its own system for |
| scheduling background tasks. The <code>git</code> <code>maintenance</code> <code>start</code> command uses |
| the <code>schtasks</code> command to submit tasks to this system. You can inspect |
| all background tasks using the Task Scheduler application. The tasks |
| added by Git have names of the form <code>Git</code> <code>Maintenance</code> (<em><frequency></em>). |
| The Task Scheduler GUI has ways to inspect these tasks, but you can also |
| export the tasks to XML files and view the details there.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Note that since Git is a console application, these background tasks |
| create a console window visible to the current user. This can be changed |
| manually by selecting the "Run whether user is logged in or not" option |
| in Task Scheduler. This change requires a password input, which is why |
| <code>git</code> <code>maintenance</code> <code>start</code> does not select it by default.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If you want to customize the background tasks, please rename the tasks |
| so future calls to <code>git</code> <code>maintenance</code> (<code>start</code>|<code>stop</code>) do not overwrite your |
| custom tasks.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_configuration">CONFIGURATION</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Everything below this line in this section is selectively included |
| from the <a href="git-config.html">git-config(1)</a> documentation. The content is the same |
| as what’s found there:</p> |
| </div> |
| <div class="dlist"> |
| <dl> |
| <dt class="hdlist1">maintenance.auto</dt> |
| <dd> |
| <p>This boolean config option controls whether some commands run |
| <code>git</code> <code>maintenance</code> <code>run</code> <code>--auto</code> after doing their normal work. Defaults |
| to true.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.autoDetach</dt> |
| <dd> |
| <p>Many Git commands trigger automatic maintenance after they have |
| written data into the repository. This boolean config option |
| controls whether this automatic maintenance shall happen in the |
| foreground or whether the maintenance process shall detach and |
| continue to run in the background.</p> |
| <div class="paragraph"> |
| <p>If unset, the value of <code>gc.autoDetach</code> is used as a fallback. Defaults |
| to true if both are unset, meaning that the maintenance process will |
| detach.</p> |
| </div> |
| </dd> |
| <dt class="hdlist1">maintenance.strategy</dt> |
| <dd> |
| <p>This string config option provides a way to specify one of a few |
| recommended schedules for background maintenance. This only affects |
| which tasks are run during <code>git</code> <code>maintenance</code> <code>run</code> <code>--schedule=X</code> |
| commands, provided no <code>--task=</code><em><task></em> arguments are provided. |
| Further, if a <code>maintenance.</code><em><task></em><code>.schedule</code> config value is set, |
| then that value is used instead of the one provided by |
| <code>maintenance.strategy</code>. The possible strategy strings are:</p> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p><code>none</code>: This default setting implies no tasks are run at any schedule.</p> |
| </li> |
| <li> |
| <p><code>incremental</code>: This setting optimizes for performing small maintenance |
| activities that do not delete any data. This does not schedule the <code>gc</code> |
| task, but runs the <code>prefetch</code> and <code>commit-graph</code> tasks hourly, the |
| <code>loose-objects</code> and <code>incremental-repack</code> tasks daily, and the <code>pack-refs</code> |
| task weekly.</p> |
| </li> |
| </ul> |
| </div> |
| </dd> |
| <dt class="hdlist1">maintenance.<task>.enabled</dt> |
| <dd> |
| <p>This boolean config option controls whether the maintenance task |
| with name <em><task></em> is run when no <code>--task</code> option is specified to |
| <code>git</code> <code>maintenance</code> <code>run</code>. These config values are ignored if a |
| <code>--task</code> option exists. By default, only <code>maintenance.gc.enabled</code> |
| is true.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.<task>.schedule</dt> |
| <dd> |
| <p>This config option controls whether or not the given <em><task></em> runs |
| during a <code>git</code> <code>maintenance</code> <code>run</code> <code>--schedule=</code><em><frequency></em> command. The |
| value must be one of "hourly", "daily", or "weekly".</p> |
| </dd> |
| <dt class="hdlist1">maintenance.commit-graph.auto</dt> |
| <dd> |
| <p>This integer config option controls how often the <code>commit-graph</code> task |
| should be run as part of <code>git</code> <code>maintenance</code> <code>run</code> <code>--auto</code>. If zero, then |
| the <code>commit-graph</code> task will not run with the <code>--auto</code> option. A |
| negative value will force the task to run every time. Otherwise, a |
| positive value implies the command should run when the number of |
| reachable commits that are not in the commit-graph file is at least |
| the value of <code>maintenance.commit-graph.auto</code>. The default value is |
| 100.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.loose-objects.auto</dt> |
| <dd> |
| <p>This integer config option controls how often the <code>loose-objects</code> task |
| should be run as part of <code>git</code> <code>maintenance</code> <code>run</code> <code>--auto</code>. If zero, then |
| the <code>loose-objects</code> task will not run with the <code>--auto</code> option. A |
| negative value will force the task to run every time. Otherwise, a |
| positive value implies the command should run when the number of |
| loose objects is at least the value of <code>maintenance.loose-objects.auto</code>. |
| The default value is 100.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.loose-objects.batchSize</dt> |
| <dd> |
| <p>This integer config option controls the maximum number of loose objects |
| written into a packfile during the <code>loose-objects</code> task. The default is |
| fifty thousand. Use value <code>0</code> to indicate no limit.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.incremental-repack.auto</dt> |
| <dd> |
| <p>This integer config option controls how often the <code>incremental-repack</code> |
| task should be run as part of <code>git</code> <code>maintenance</code> <code>run</code> <code>--auto</code>. If zero, |
| then the <code>incremental-repack</code> task will not run with the <code>--auto</code> |
| option. A negative value will force the task to run every time. |
| Otherwise, a positive value implies the command should run when the |
| number of pack-files not in the multi-pack-index is at least the value |
| of <code>maintenance.incremental-repack.auto</code>. The default value is 10.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.reflog-expire.auto</dt> |
| <dd> |
| <p>This integer config option controls how often the <code>reflog-expire</code> task |
| should be run as part of <code>git</code> <code>maintenance</code> <code>run</code> <code>--auto</code>. If zero, then |
| the <code>reflog-expire</code> task will not run with the <code>--auto</code> option. A |
| negative value will force the task to run every time. Otherwise, a |
| positive value implies the command should run when the number of |
| expired reflog entries in the "HEAD" reflog is at least the value of |
| <code>maintenance.loose-objects.auto</code>. The default value is 100.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.rerere-gc.auto</dt> |
| <dd> |
| <p>This integer config option controls how often the <code>rerere-gc</code> task |
| should be run as part of <code>git</code> <code>maintenance</code> <code>run</code> <code>--auto</code>. If zero, then |
| the <code>rerere-gc</code> task will not run with the <code>--auto</code> option. A negative |
| value will force the task to run every time. Otherwise, any positive |
| value implies the command will run when the "rr-cache" directory exists |
| and has at least one entry, regardless of whether it is stale or not. |
| This heuristic may be refined in the future. The default value is 1.</p> |
| </dd> |
| <dt class="hdlist1">maintenance.worktree-prune.auto</dt> |
| <dd> |
| <p>This integer config option controls how often the <code>worktree-prune</code> task |
| should be run as part of <code>git</code> <code>maintenance</code> <code>run</code> <code>--auto</code>. If zero, then |
| the <code>worktree-prune</code> task will not run with the <code>--auto</code> option. A |
| negative value will force the task to run every time. Otherwise, a |
| positive value implies the command should run when the number of |
| prunable worktrees exceeds the value. The default value is 1.</p> |
| </dd> |
| </dl> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="_git">GIT</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Part of the <a href="git.html">git(1)</a> suite</p> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div id="footer"> |
| <div id="footer-text"> |
| Last updated 2025-06-20 18:10:42 -0700 |
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