imapproxy can only take you from "doesn't work" to "might as well not work", ime. If at all possible look into a stateful web client.
-bdh On Oct 6, 2010, at 6:32 PM, Chris Hobbs <cho...@nhusd.k12.ca.us> wrote: > Hi all, > > I'm sure my issues are a result of misconfiguration, but I'm hoping someone > can point me in the right direction. I'm getting pressure to move us back to > GroupWise, which I desperately want to avoid :-/ > > We're running dovecot 1.2.9 on Ubuntu 10.4 LTS+postfix. The server is a VM > with 1 vCPU and 4GB of RAM. We serve about 10,000 users with anywhere from > 500-1000 logged in at any one time. Messages are stored in Maildir format on > two NFS servers (one for staff, the other for students). > > Today I implemented the "High performance" setup described here: > http://wiki.dovecot.org/NFS (mainly moving indexes off of NFS, since I'm only > using the one server). > > I also added imapproxy to our webmail client server (SOGo). The vast majority > of our users come in over the web. > > We currently see load averages spiking into the 20-30 range. When this > happens, service crawls to a near standstill, and ultimately the SOGo client > starts crashing out. > > I'm wondering if anything jumps out at anybody here - feel free to mock > if/when you find an obvious configuration problem. I just want it to work :-) > > dovecot -n > > # 1.2.9: /etc/dovecot/dovecot.conf > # OS: Linux 2.6.32-25-server x86_64 Ubuntu 10.04.1 LTS > log_timestamp: %Y-%m-%d %H:%M:%S > protocols: imap imaps pop3 pop3s managesieve > listen(default): * > listen(imap): * > listen(pop3): * > listen(managesieve): *:2000 > ssl_cert_file: /etc/dovecot/certs/mail_nhusd_k12_ca_us.crt > ssl_key_file: /etc/dovecot/certs/mail_nhusd_k12_ca_us.key > disable_plaintext_auth: no > login_dir: /var/run/dovecot/login > login_executable(default): /usr/lib/dovecot/imap-login > login_executable(imap): /usr/lib/dovecot/imap-login > login_executable(pop3): /usr/lib/dovecot/pop3-login > login_executable(managesieve): /usr/lib/dovecot/managesieve-login > login_process_per_connection: no > login_process_size: 512 > login_processes_count: 20 > login_max_processes_count: 3000 > login_max_connections: 64 > max_mail_processes: 2048 > mail_max_userip_connections(default): 20 > mail_max_userip_connections(imap): 20 > mail_max_userip_connections(pop3): 10 > mail_max_userip_connections(managesieve): 10 > mail_access_groups: staffmailusers > mail_privileged_group: dovecot > mail_uid: mail > mail_gid: 502 > mail_location: maildir:~/Maildir:INDEX=/var/indexes/%u > mail_nfs_storage: yes > mbox_write_locks: fcntl dotlock > mail_executable(default): /usr/lib/dovecot/imap > mail_executable(imap): /usr/lib/dovecot/imap > mail_executable(pop3): /usr/lib/dovecot/pop3 > mail_executable(managesieve): /usr/lib/dovecot/managesieve > mail_plugins(default): acl imap_acl quota imap_quota expire > mail_plugins(imap): acl imap_acl quota imap_quota expire > mail_plugins(pop3): > mail_plugins(managesieve): > mail_plugin_dir(default): /usr/lib/dovecot/modules/imap > mail_plugin_dir(imap): /usr/lib/dovecot/modules/imap > mail_plugin_dir(pop3): /usr/lib/dovecot/modules/pop3 > mail_plugin_dir(managesieve): /usr/lib/dovecot/modules/managesieve > namespace: > type: private > separator: / > inbox: yes > list: yes > subscriptions: yes > namespace: > type: shared > separator: / > prefix: shared/%%u/ > location: maildir:%%h/Maildir:INDEX=~/Maildir/shared/%%u > list: children > lda: > deliver_log_format: %$ -- FROM=%f SUBJECT=%s > mail_plugins: cmusieve acl expire > log_path: > info_log_path: > syslog_facility: mail > postmaster_address:postmas...@nhusd.k12.ca.us > hostname: mail.nhusd.k12.ca.us > auth_socket_path: /var/run/dovecot/auth-master > auth default: > passdb: > driver: pam > passdb: > driver: ldap > args: /etc/dovecot/dovecot-ldap.conf > userdb: > driver: ldap > args: /etc/dovecot/dovecot-ldap.conf > socket: > type: listen > master: > path: /var/run/dovecot/auth-master > mode: 384 > plugin: > quota: maildir:User quota > quota_rule: *:storage=9G > quota_rule2: Trash:storage=200M > acl: vfile > acl_shared_dict:file:/home/staff/dovecot/shared-mailboxes > expire: Trash 7 Trash/* 7 Spam 30 > expire_dict: proxy::expire > sieve: ~/.dovecot.sieve > sieve_dir: ~/sieve > sieve_extensions: +imapflags > dict: > expire: mysql:/etc/dovecot/dovecot-dict-expire.conf > > > > -- > Chris Hobbs > Director, Technology > New Haven Unified School District > > -- > This message was scanned by ESVA and is believed to be clean. >
