Merge branch 'kh/commit'

[git.git] / Documentation / git-gc.txt

diff --git a/Documentation/git-gc.txt b/Documentation/git-gc.txt
index 40c1ce4a21302b315c8f88802645ce0161a0c47c..872056ea040f1f4953b538aaa4a14ded4d2170a9 100644 (file)
--- a/Documentation/git-gc.txt
+++ b/Documentation/git-gc.txt
@@ -19,7 +19,8 @@ created from prior invocations of gitlink:git-add[1].
 
 Users are encouraged to run this task on a regular basis within
 each repository to maintain good disk space utilization and good
-operating performance.
+operating performance. Some git commands may automatically run
+`git-gc`; see the `--auto` flag below for details.
 
 OPTIONS
 -------
@@ -44,13 +45,23 @@ OPTIONS
        few hundred changesets or so.
 
 --auto::
-       With this option, `git gc` checks if there are too many
-       loose objects in the repository and runs
-       gitlink:git-repack[1] with `-d -l` option to pack them.
-       The threshold is set with `gc.auto` configuration
-       variable, and can be disabled by setting it to 0.  Some
-       Porcelain commands use this after they perform operation
-       that could create many loose objects automatically.
+       With this option, `git gc` checks whether any housekeeping is
+       required; if not, it exits without performing any work.
+       Some git commands run `git gc --auto` after performing
+       operations that could create many loose objects.
++
+Housekeeping is required if there are too many loose objects or
+too many packs in the repository. If the number of loose objects
+exceeds the value of the `gc.auto` configuration variable, then
+all loose objects are combined into a single pack using
+`git-repack -d -l`.  Setting the value of `gc.auto` to 0
+disables automatic packing of loose objects.
++
+If the number of packs exceeds the value of `gc.autopacklimit`,
+then existing packs (except those marked with a `.keep` file)
+are consolidated into a single pack by using the `-A` option of
+`git-repack`. Setting `gc.autopacklimit` to 0 disables
+automatic consolidation of packs.
 
 Configuration
 -------------