git tends to die when mmap(2) fails on this limit, so let
users know about it. Perhaps git could gracefully fallback.
Read-only daemons
+=item 7
+
+Other OS tuning knobs
+
=back
=head2 New inboxes: public-inbox-init -V2
increases memory use of client sockets, sure to account for that in
capacity planning.
+=head2 Other OS tuning knobs
+
+Linux users: the C<sys.vm.max_map_count> sysctl may need to be increased if
+handling thousands of inboxes (with L<public-inbox-extindex(1)>) to avoid
+out-of-memory errors from git.
+
+Other OSes may have similar tuning knobs (patches appreciated).
+
+
=head1 CONTACT
Feedback encouraged via plain-text mail to L<mailto:meta@public-inbox.org>