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-rw-r--r--Documentation/public-inbox-extindex.pod13
-rw-r--r--Documentation/public-inbox-index.pod7
2 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/public-inbox-extindex.pod b/Documentation/public-inbox-extindex.pod
index b53e45ed..2db7d7e9 100644
--- a/Documentation/public-inbox-extindex.pod
+++ b/Documentation/public-inbox-extindex.pod
@@ -80,6 +80,19 @@ doubles the size of the already-large Xapian database.
 Used with C<--reindex>, it will only look for new and stale
 entries and not touch already-indexed messages.
 
+=item --no-multi-pack-index
+
+Disable writing a L<git-multi-pack-index(1)> file to save memory.
+Normally, enabling multi-pack-index speeds up startup time of
+subsequent L<git-cat-file(1)> processes by 3-4%, but generating
+this file requires several GB of memory with large repos.
+
+Unlike the C<core.multiPackIndex> directive in git, it's still
+possible to read existing multi-pack-index files if they are
+created elsewhere.
+
+Available in public-inbox 2.0.0+
+
 =back
 
 =head1 FILES
diff --git a/Documentation/public-inbox-index.pod b/Documentation/public-inbox-index.pod
index 14f157a5..f1a2180a 100644
--- a/Documentation/public-inbox-index.pod
+++ b/Documentation/public-inbox-index.pod
@@ -192,6 +192,13 @@ external indices are configured.
 Do not update the C<all> external index by default.  This negates
 all uses of C<-E> / C<--update-extindex=> on the command-line.
 
+=item --no-multi-pack-index
+
+Disables writing the multi-pack-index when using L</--update-extindex>.
+See L<public-inbox-extindex(1)/--no-multi-pack-index> for details.
+
+Available in public-inbox 2.0.0+
+
 =item --since=DATESTRING
 
 =item --after=DATESTRING