diff --git a/INSTALL b/INSTALL
index bad80de389ab8946d717bed16b373d97e4872d10..a472b277000f185c857ce1381359399ce6df9b3c 100644
--- a/INSTALL
+++ b/INSTALL
@@ -57,6 +57,9 @@ Setup on Arch Linux
     # ln -s /usr/local/bin/aurweb-git-update hooks/update
     # chown -R aur .
 
+   It is recommended to read doc/git-interface.txt for more information on the
+   administration of the package Git repository.
+
 8) Configure sshd(8) for the AUR. Add the following lines at the end of your
    sshd_config(5) and restart the sshd. Note that OpenSSH 6.9 or newer is
    needed!
diff --git a/doc/git-interface.txt b/doc/git-interface.txt
index 14ff0c5d9c009358a3b119a4237cc84cc35ecfa9..475fda66227ca67cf331d11dbfdee3b74bf9a899 100644
--- a/doc/git-interface.txt
+++ b/doc/git-interface.txt
@@ -81,8 +81,8 @@ the GIT_NAMESPACE environment variable accordingly before forwarding a request.
 An example configuration for nginx and fcgiwrap can be found in the INSTALL
 instructions in the top-level directory.
 
-Further Configuration
----------------------
+Further Configuration and Administration
+----------------------------------------
 
 When using Git namespaces, Git advertises refs outside the current namespace as
 so-called "have" lines. This is normally used to reduce traffic but it has the
@@ -94,3 +94,10 @@ In order to omit these advertisements, one can add the strings "^refs/",
 "!refs/" and "!HEAD" to the transfer.hideRefs configuration setting. Note that
 the order of these patterns is important ("^refs/" must come first) and that
 Git 2.7 or newer is required for them to work.
+
+Since garbage collection always affects all objects (from all namespaces), it
+is also recommended to disable automatic garbage collection by setting
+receive.autogc to false. Remember to periodically run `git gc` manually or
+setup a maintenance script which initiates the garbage collection if you follow
+this advice. For gc.pruneExpire, we recommend "3.months.ago", such that commits
+that became unreachable by TU intervention are kept for a while.