Hello all.
We start to use Dovecot at our email production but it runs not such fast as we expect.
We use Dell 2950 with 4GbRAM at FreeBSD-7.0-p9 - load avarage never upper a 0.5
We have about 500 clients most of it use Outlook 2007 via IMAP.
We run in this problems:
- Sync of imap folder is really slow(I think it is Outlook problem)
- Time after time we got Sync error from outlook
- Time after time our monitoring system says what IMAP port not answer in 10 sec. In real life it start to answer in 15-20 sec what is not really good - client thinks what server don`t work. If I restart dovecot
- it start to answer in 1-3 sec.
I think problem in my conf, may be I need tune it?
*dovecot -n don`t give full conf so i use this:* mail# grep -v '#' /usr/local/etc/dovecot.conf | egrep -v '^$' base_dir = /var/run/dovecot/ protocols = imap imaps pop3 pop3s managesieve listen = * disable_plaintext_auth = yes shutdown_clients = yes log_path = /var/log/dovecot/dovecot.log info_log_path = /var/log/dovecot/dovecot.log log_timestamp = "%b %d %H:%M:%S " syslog_facility = mail ssl_disable = no ssl_cert_file = /usr/local/etc/certs/fxclub_org.crt ssl_key_file = /usr/local/etc/certs/fxclub_org.key ssl_ca_file = /usr/local/etc/certs/GlobalSignCA.crt ssl_verify_client_cert = no ssl_parameters_regenerate = 168 ssl_cipher_list = ALL:!LOW:!SSLv2 verbose_ssl = no login_dir = /var/run/dovecot/login login_user = dovecot login_process_size = 64 login_process_per_connection = yes login_processes_count = 10 login_max_processes_count = 128 login_greeting = Dovecot ready. login_log_format_elements = user=<%u> method=%m rip=%r lip=%l %c login_log_format = %$: %s mail_location = maildir:/var/spool/dovecot/domains/%d/%n/ mail_uid = dmail mail_gid = dmail mail_privileged_group = mail mail_full_filesystem_access = no mail_debug = no mail_log_prefix = "%Us(%u): " mail_log_max_lines_per_sec = 10 mmap_disable = no dotlock_use_excl = yes fsync_disable = no mail_nfs_storage = no mail_nfs_index = no lock_method = fcntl mail_drop_priv_before_exec = no verbose_proctitle = yes first_valid_uid = 500 first_valid_gid = 0 max_mail_processes = 512 mail_process_size = 256 mail_max_keyword_length = 50 mail_cache_min_mail_count = 0 mailbox_idle_check_interval = 30 mail_save_crlf = no maildir_stat_dirs = no maildir_copy_with_hardlinks = yes maildir_copy_preserve_filename = no mbox_read_locks = fcntl mbox_write_locks = dotlock fcntl mbox_lock_timeout = 300 mbox_dotlock_change_timeout = 120 mbox_min_index_size = 0 protocol imap { login_executable = /usr/local/libexec/dovecot/imap-login
mail_executable = /usr/local/libexec/dovecot/imap imap_max_line_length = 65536 mail_max_userip_connections = 10 mail_plugins = quota imap_quota autocreate mail_plugin_dir = /usr/local/lib/dovecot/imap login_greeting_capability = yes imap_logout_format = bytes=%i/%o imap_client_workarounds = delay-newmail tb-extra-mailbox-sep }
protocol pop3 { login_executable = /usr/local/libexec/dovecot/pop3-login mail_executable = /usr/local/libexec/dovecot/pop3 pop3_enable_last = no pop3_lock_session = no pop3_uidl_format = %08Xu%08Xv pop3_logout_format = top=%t/%p, retr=%r/%b, del=%d/%m, size=%s mail_max_userip_connections = 3 mail_plugins = quota mail_plugin_dir = /usr/local/lib/dovecot/pop3 pop3_client_workarounds = outlook-no-nuls oe-ns-eoh } protocol lda { postmaster_address = postmaster@fxclub.org hostname = mail.fxclub.org mail_plugins = cmusieve quota mail_plugin_dir = /usr/local/lib/dovecot/lda quota_full_tempfail = yes deliver_log_format = msgid=%m: %$ log_path = /var/log/dovecot/deliver.log info_log_path = /var/log/dovecot/deliver.log sendmail_path = /usr/sbin/sendmail rejection_reason = Your message to <%t> was automatically rejected:%n%r auth_socket_path = /var/run/dovecot/auth-master sieve_global_path = /var/spool/dovecot/global.sieve } protocol managesieve { listen = *:2000 login_executable = /usr/local/libexec/dovecot/managesieve-login mail_executable = /usr/local/libexec/dovecot/managesieve managesieve_max_line_length = 65536 sieve_storage = % sieve = ~/.dovecot.sieve mail_location = managesieve_implementation_string = dovecot } auth_executable = /usr/local/libexec/dovecot/dovecot-auth auth_process_size = 256 auth_cache_size = 0 auth_cache_ttl = 3600 auth_cache_negative_ttl = 3600 auth_username_chars = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890.-_@ auth_username_format = %Lu auth_verbose = yes auth_debug = no auth_debug_passwords = no auth_worker_max_count = 100 auth_failure_delay = 2 auth default { mechanisms = plain login passdb ldap { args = /usr/local/etc/dovecot-ldap.conf } userdb ldap { args = /usr/local/etc/dovecot-ldap.conf } user = dovecot-auth count = 1 ssl_require_client_cert = no socket listen { master { path = /var/run/dovecot/auth-master mode = 0600 user = dmail } client { path = /var/run/dovecot/auth-client mode = 0660 user = exim } } } dict { } plugin {
quota = maildir quota_rule = *:storage=1024M quota_rule2 = Trash:storage=1256M quota_rule3 = SPAM:ignore quota_warning = storage=95%% /usr/local/bin/quota-warning.sh 95 quota_warning2 = storage=80%% /usr/local/bin/quota-warning.sh 80 autocreate = Trash autocreate2 = Sent autocreate3 = Spam autosubscribe = Trash autosubscribe2 = Sent autosubscribe3 = Spam }
-- Best regards, Proskurin Kirill