From c03c331b84b22f3322db1ad61b5dcd7fbaa020d3 Mon Sep 17 00:00:00 2001
From: Guilhem Moulin <guilhem@fripost.org>
Date: Fri, 4 Jul 2014 17:48:17 +0200
Subject: Performance tuning in Dovecot's configuration.

---
 roles/IMAP/files/etc/dovecot/conf.d/10-master.conf | 12 ++++++++++--
 roles/IMAP/files/etc/dovecot/conf.d/20-imap.conf   |  2 +-
 2 files changed, 11 insertions(+), 3 deletions(-)

(limited to 'roles/IMAP')

diff --git a/roles/IMAP/files/etc/dovecot/conf.d/10-master.conf b/roles/IMAP/files/etc/dovecot/conf.d/10-master.conf
index 30a6f8b..30e9fb6 100644
--- a/roles/IMAP/files/etc/dovecot/conf.d/10-master.conf
+++ b/roles/IMAP/files/etc/dovecot/conf.d/10-master.conf
@@ -15,6 +15,9 @@ default_login_user = dovenull
 default_internal_user = dovecot
 
 service imap-login {
+  inet_listener imap {
+    port = 0
+  }
   inet_listener imaps {
     port = 993
     ssl = yes
@@ -25,8 +28,11 @@ service imap-login {
   # is faster. <doc/wiki/LoginProcess.txt>
   service_count = 1
 
+  # Max. number of IMAP processes (logins)
+  process_limit = 256
+
   # Number of processes to always keep waiting for more connections.
-  #process_min_avail = 0
+  process_min_avail = 4
 
   # If you set service_count=0, you probably need to grow this.
   #vsz_limit = $default_vsz_limit
@@ -46,7 +52,6 @@ service pop3-login {
 
 service lmtp {
   user = vmail
-  process_min_avail = 3
 
   unix_listener /var/spool/postfix-mda/private/dovecot-lmtpd {
     group = postfix
@@ -60,6 +65,9 @@ service lmtp {
     #address =
     #port = 
   #}
+
+  # Number of processes to always keep waiting for more connections.
+  process_min_avail = 4
 }
 
 service imap {
diff --git a/roles/IMAP/files/etc/dovecot/conf.d/20-imap.conf b/roles/IMAP/files/etc/dovecot/conf.d/20-imap.conf
index 6771cc7..fa127c6 100644
--- a/roles/IMAP/files/etc/dovecot/conf.d/20-imap.conf
+++ b/roles/IMAP/files/etc/dovecot/conf.d/20-imap.conf
@@ -10,7 +10,7 @@ protocol imap {
 
   # Maximum number of IMAP connections allowed for a user from each IP address.
   # NOTE: The username is compared case-sensitively.
-  #mail_max_userip_connections = 10
+  mail_max_userip_connections = 16
 
   # Space separated list of plugins to load (default is global mail_plugins).
   #mail_plugins = $mail_plugins antispam
-- 
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