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-rw-r--r--Documentation/public-inbox-tuning.pod11
1 files changed, 7 insertions, 4 deletions
diff --git a/Documentation/public-inbox-tuning.pod b/Documentation/public-inbox-tuning.pod
index 7b18b3bc..53668ecc 100644
--- a/Documentation/public-inbox-tuning.pod
+++ b/Documentation/public-inbox-tuning.pod
@@ -165,12 +165,15 @@ Other OSes may have similar tuning knobs (patches appreciated).
 
 =head2 Scalability to many inboxes
 
+L<public-inbox-extindex(1)> allows any number of public-inboxes
+to share the same Xapian indices.
+
 git 2.33+ startup time is orders-of-magnitude faster and uses
 less memory when dealing with thousands of alternates required
-for thousands of inboxes.
+for thousands of inboxes with L<public-inbox-extindex(1)>.
 
-L<public-inbox-extindex(1)> allows any number of public-inboxes
-to share the same Xapian indices.
+Frequent packing (via L<git-gc(1)>) both improves performance
+and reduces the need to increase C<sys.vm.max_map_count>.
 
 =head1 CONTACT
 
@@ -184,6 +187,6 @@ L<http://4uok3hntl7oi7b4uf4rtfwefqeexfzil2w6kgk2jn5z2f764irre7byd.onion/meta/>,
 
 =head1 COPYRIGHT
 
-Copyright 2020-2021 all contributors L<mailto:meta@public-inbox.org>
+Copyright all contributors L<mailto:meta@public-inbox.org>
 
 License: AGPL-3.0+ L<https://www.gnu.org/licenses/agpl-3.0.txt>