[Dovecot] Gah, pop3 falling over

[Brandon Lamb]

Why would I be seeing a million of these?

dovecot: 2008-10-27 09:12:33 Warning:
chdir(/mail/mail/domain/u/username/) blocked for 18 secs

Two servers were working fine and then all of a sudden this morning
bam 500 load and theres a million dovecots and tons of these lines in
the logs.

It is like everyone gets up at exactly 8:30 and hits the pop3 server at once.

Anyway, dovecot 1.1.5, nfs mount, debian lenny/sid amd64,
2.6.26-1-amd64 i had the performance mode options for login
configured, i just set back to the single process per login though, I
think that hasnt fallen over that way but I really dont remember
anymore. I included the dovecot -n using the suggest performance login
settings? Do I have something totally out of whack?

# 1.1.5: /etc/dovecot/dovecot.conf
base_dir: /var/run/dovecot/
log_path: /var/log/dovecot/dovecot.log
info_log_path: /var/log/dovecot/info.log
log_timestamp: %Y-%m-%d %H:%M:%S
protocols: imap pop3
listen(default): 208.200.248.2 208.200.248.7
listen(imap): 208.200.248.2 208.200.248.7
listen(pop3): 208.200.248.2
disable_plaintext_auth: no
login_dir: /var/run/dovecot/login
login_executable(default): /usr/local/libexec/dovecot/imap-login
login_executable(imap): /usr/local/libexec/dovecot/imap-login
login_executable(pop3): /usr/local/libexec/dovecot/pop3-login
login_greeting: Hello there.
login_log_format_elements: <%u> <%r>
login_log_format: %s
login_process_per_connection: no
login_process_size: 128
login_processes_count: 4
login_max_processes_count: 8
login_max_connections: 128
valid_chroot_dirs: /mail/mail
mail_max_userip_connections(default): 15
mail_max_userip_connections(imap): 15
mail_max_userip_connections(pop3): 4
verbose_proctitle: yes
first_valid_uid: 8
last_valid_uid: 8
first_valid_gid: 8
last_valid_gid: 8
mail_access_groups: mail
mail_privileged_group: mail
mail_uid: 8
mail_gid: 8
mail_location: maildir:~/:INDEX=/dovecot-index
mailbox_idle_check_interval: 60
mmap_disable: yes
mail_nfs_storage: yes
mail_nfs_index: yes
mailbox_list_index_disable: no
mail_executable(default): /usr/local/libexec/dovecot/imap
mail_executable(imap): /usr/local/libexec/dovecot/imap
mail_executable(pop3): /usr/local/libexec/dovecot/pop3
mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(pop3):
mail_plugin_dir(default): /usr/local/lib/dovecot/imap
mail_plugin_dir(imap): /usr/local/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/local/lib/dovecot/pop3
mail_log_prefix: %Ls <%u>:
imap_client_workarounds(default): outlook-idle delay-newmail
imap_client_workarounds(imap): outlook-idle delay-newmail
imap_client_workarounds(pop3):
pop3_no_flag_updates(default): no
pop3_no_flag_updates(imap): no
pop3_no_flag_updates(pop3): yes
pop3_client_workarounds(default):
pop3_client_workarounds(imap):
pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
pop3_logout_format(default): top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
pop3_logout_format(imap): top=%t/%p, retr=%r/%b, del=%d/%m, size=%s
pop3_logout_format(pop3): retr=%r/%b, del=%d/%m, size=%s
auth default:
  mechanisms: plain login
  default_realm: olypen.com
  cache_size: 8192
  cache_ttl: 300
  worker_max_count: 60
  passdb:
    driver: sql
    args: /etc/dovecot/dovecot-sql.conf
  userdb:
    driver: prefetch
  userdb:
    driver: sql
    args: /etc/dovecot/dovecot-sql.conf
  socket:
    type: listen
    client:
      path: /var/run/dovecot/auth-client
      mode: 438
      user: mail
      group: mail
    master:
      path: /var/run/dovecot/auth-master
      mode: 438
      user: mail
      group: mail
plugin:
  quota: maildir
  quota_rule: Trash:ignore
  quota_rule2: Sent:ignore
  quota_rule3: Spam:ignore
  quota_rule4: Archive:ignore
  quota_rule5: Sent Items:ignore
  quota_rule6: Deleted Items:ignore
  auth_socket_path: /var/run/dovecot/auth-master