Hi!

We are running dovecot-imapd on Debian sarge out of the backports.org packages (version 1.0.rc15-1~bpo1).

We have ~ 80 clients using secure IMAP.

I understand that imap-login has to run for every SSL connection. Thus I already increased the max value for the number of imap-login processes.

But unfortunately dovecot is unresponsive from time to time. Where can I tune the installation? Do I need to upgrade to 1.0.0, for which no backported packages exist for Debian sarge?

This is the output of dovecot -n:

log_timestamp: %Y-%m-%d %H:%M:%S listen: *:143 ssl_listen: *:993 ssl_cert_file: /etc/courier/imapd.pem ssl_key_file: /etc/courier/imapd.pem disable_plaintext_auth: no login_dir: /var/run/dovecot/login login_executable: /usr/lib/dovecot/imap-login login_processes_count: 12 login_max_processes_count: 512 verbose_proctitle: yes mail_location: maildir:~/.Maildir:INDEX=/var/cache/dovecot/INBOX.%u:CONTROL=/var/cache/dovecot/INBOX.%u mail_full_filesystem_access: yes maildir_stat_dirs: yes maildir_copy_with_hardlinks: yes namespace: type: private separator: . prefix: INBOX. inbox: yes namespace: type: public separator: . prefix: shared. location: maildir:~/.Maildir/shared:INDEX=/var/cache/dovecot/shared.%u:CONTROL=/var/cache/dovecot/shared.%u auth default: verbose: yes passdb: driver: passwd userdb: driver: passwd

Homedirectories are on NFS, /var/cache/dovecot is a local filesystem. Clients are mostly Thunderbird, where max connection to IMAP server is set to 5.

Greetings

Robert Sander Senior Manager Information Systems Epigenomics AG Kleine Praesidentenstr. 1 10178 Berlin, Germany phone:+49-30-24345-0 fax:+49-30-24345-555 http://www.epigenomics.com robert.sander@epigenomics.com