minor fixes

[distro-setup] / mail-setup

diff --git a/mail-setup b/mail-setup
index 8f2a5c5f973fbecee46c5a113b34fbba73ae9d55..08ec7aed2126611e4641cde9924e0dad789e2433 100755 (executable)
--- a/mail-setup
+++ b/mail-setup
@@ -1,7 +1,23 @@
 #!/bin/bash
 # * intro
-# Copyright (C) 2019 Ian Kelling
-# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# Program to install and configure Ian's email related programs
+# Copyright (C) 2024  Ian Kelling
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 # todo:
 # on bk (and fsf servers that run multiple exim4 daemons, eg eximfsf2 and eximfsf3),
@@ -2069,6 +2085,24 @@ EOF
 
     rm -fv /etc/dovecot/conf.d/20-lmtp.conf # file from prev version
     cat >>/etc/dovecot/local.conf <<EOF
+
+# /etc/dovecot/conf.d/10-master.conf says the default is 256M.
+# but I started getting oom errors in the syslog
+# Mar 27 15:10:04 sy dovecot[330088]: lmtp(iank)<3839880><gO/BDwtvBGaIlzoA7AdaJQ>: Fatal: master: service(lmtp): child 3839880 returned error 83 (Out of memory (service lmtp { vsz_limit=256 MB }, you may need to increase it) - set CORE_OUTOFMEM=1 environment to get core dump)
+# exim would just queue mail until it eventually succeeded.
+# Deciding what to increase it to, I found this
+# https://dovecot.org/list/dovecot/2011-December/080056.html
+# which suggests 3x the largest dovecot.index.cache file
+# and then I found that
+# md/l/testignore/dovecot.index.cache is 429M, my largest cache file,
+# but that folder only has 2k messages.
+# next biggest is md/l/qemu-devel/dovecot.index.cache 236M
+# which lead to me a search https://doc.dovecot.org/admin_manual/known_issues/large_cache/
+# which suggests 1.5x the maximum cache file size 1G, and
+# that I can safely rm the indix
+
+default_vsz_limit = 1500M
+
 # simple password file based login
 !include conf.d/auth-passwdfile.conf.ext