diff --git a/.gitignore b/.gitignore
index ee509a2ad2..a5808fa30d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,6 +90,7 @@
 /git-ls-tree
 /git-mailinfo
 /git-mailsplit
+/git-maintenance
 /git-merge
 /git-merge-base
 /git-merge-index
diff --git a/Documentation/git-maintenance.txt b/Documentation/git-maintenance.txt
new file mode 100644
index 0000000000..ff47fb3641
--- /dev/null
+++ b/Documentation/git-maintenance.txt
@@ -0,0 +1,57 @@
+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.
+
+TASKS
+-----
+
+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.
+
+GIT
+---
+Part of the linkgit:git[1] suite
diff --git a/builtin.h b/builtin.h
index a5ae15bfe5..17c1c0ce49 100644
--- a/builtin.h
+++ b/builtin.h
@@ -167,6 +167,7 @@ int cmd_ls_tree(int argc, const char **argv, const char *prefix);
 int cmd_ls_remote(int argc, const char **argv, const char *prefix);
 int cmd_mailinfo(int argc, const char **argv, const char *prefix);
 int cmd_mailsplit(int argc, const char **argv, const char *prefix);
+int cmd_maintenance(int argc, const char **argv, const char *prefix);
 int cmd_merge(int argc, const char **argv, const char *prefix);
 int cmd_merge_base(int argc, const char **argv, const char *prefix);
 int cmd_merge_index(int argc, const char **argv, const char *prefix);
diff --git a/builtin/gc.c b/builtin/gc.c
index aafa0946f5..ec064e8686 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -699,3 +699,61 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 
 	return 0;
 }
+
+static const char * const builtin_maintenance_run_usage[] = {
+	N_("git maintenance run [--auto]"),
+	NULL
+};
+
+struct maintenance_run_opts {
+	int auto_flag;
+};
+
+static int maintenance_task_gc(struct maintenance_run_opts *opts)
+{
+	struct child_process child = CHILD_PROCESS_INIT;
+
+	child.git_cmd = 1;
+	strvec_push(&child.args, "gc");
+
+	if (opts->auto_flag)
+		strvec_push(&child.args, "--auto");
+
+	close_object_store(the_repository->objects);
+	return run_command(&child);
+}
+
+static int maintenance_run(int argc, const char **argv, const char *prefix)
+{
+	struct maintenance_run_opts opts;
+	struct option builtin_maintenance_run_options[] = {
+		OPT_BOOL(0, "auto", &opts.auto_flag,
+			 N_("run tasks based on the state of the repository")),
+		OPT_END()
+	};
+	memset(&opts, 0, sizeof(opts));
+
+	argc = parse_options(argc, argv, prefix,
+			     builtin_maintenance_run_options,
+			     builtin_maintenance_run_usage,
+			     PARSE_OPT_STOP_AT_NON_OPTION);
+
+	if (argc != 0)
+		usage_with_options(builtin_maintenance_run_usage,
+				   builtin_maintenance_run_options);
+	return maintenance_task_gc(&opts);
+}
+
+static const char builtin_maintenance_usage[] = N_("git maintenance run [<options>]");
+
+int cmd_maintenance(int argc, const char **argv, const char *prefix)
+{
+	if (argc < 2 ||
+	    (argc == 2 && !strcmp(argv[1], "-h")))
+		usage(builtin_maintenance_usage);
+
+	if (!strcmp(argv[1], "run"))
+		return maintenance_run(argc - 1, argv + 1, prefix);
+
+	die(_("invalid subcommand: %s"), argv[1]);
+}
diff --git a/command-list.txt b/command-list.txt
index e5901f2213..0e3204e7d1 100644
--- a/command-list.txt
+++ b/command-list.txt
@@ -117,6 +117,7 @@ git-ls-remote                           plumbinginterrogators
 git-ls-tree                             plumbinginterrogators
 git-mailinfo                            purehelpers
 git-mailsplit                           purehelpers
+git-maintenance                         mainporcelain
 git-merge                               mainporcelain           history
 git-merge-base                          plumbinginterrogators
 git-merge-file                          plumbingmanipulators
diff --git a/git.c b/git.c
index 8bd1d7551d..24f250d29a 100644
--- a/git.c
+++ b/git.c
@@ -529,6 +529,7 @@ static struct cmd_struct commands[] = {
 	{ "ls-tree", cmd_ls_tree, RUN_SETUP },
 	{ "mailinfo", cmd_mailinfo, RUN_SETUP_GENTLY | NO_PARSEOPT },
 	{ "mailsplit", cmd_mailsplit, NO_PARSEOPT },
+	{ "maintenance", cmd_maintenance, RUN_SETUP_GENTLY | NO_PARSEOPT },
 	{ "merge", cmd_merge, RUN_SETUP | NEED_WORK_TREE },
 	{ "merge-base", cmd_merge_base, RUN_SETUP },
 	{ "merge-file", cmd_merge_file, RUN_SETUP_GENTLY },
diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
new file mode 100755
index 0000000000..c2f0b1d0c0
--- /dev/null
+++ b/t/t7900-maintenance.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+test_description='git maintenance builtin'
+
+. ./test-lib.sh
+
+test_expect_success 'help text' '
+	test_expect_code 129 git maintenance -h 2>err &&
+	test_i18ngrep "usage: git maintenance run" err &&
+	test_expect_code 128 git maintenance barf 2>err &&
+	test_i18ngrep "invalid subcommand: barf" err &&
+	test_expect_code 129 git maintenance 2>err &&
+	test_i18ngrep "usage: git maintenance" err
+'
+
+test_expect_success 'run [--auto]' '
+	GIT_TRACE2_EVENT="$(pwd)/run-no-auto.txt" git maintenance run &&
+	GIT_TRACE2_EVENT="$(pwd)/run-auto.txt" git maintenance run --auto &&
+	test_subcommand git gc <run-no-auto.txt &&
+	test_subcommand git gc --auto <run-auto.txt
+'
+
+test_done
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 6a8e194a99..d805e73f45 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -1628,3 +1628,36 @@ test_path_is_hidden () {
 	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
 	return 1
 }
+
+# Check that the given command was invoked as part of the
+# trace2-format trace on stdin.
+#
+#	test_subcommand [!] <command> <args>... < <trace>
+#
+# For example, to look for an invocation of "git upload-pack
+# /path/to/repo"
+#
+#	GIT_TRACE2_EVENT=event.log git fetch ... &&
+#	test_subcommand git upload-pack "$PATH" <event.log
+#
+# If the first parameter passed is !, this instead checks that
+# the given command was not called.
+#
+test_subcommand () {
+	local negate=
+	if test "$1" = "!"
+	then
+		negate=t
+		shift
+	fi
+
+	local expr=$(printf '"%s",' "$@")
+	expr="${expr%,}"
+
+	if test -n "$negate"
+	then
+		! grep "\[$expr\]"
+	else
+		grep "\[$expr\]"
+	fi
+}