[Dovecot] Load goes up imap-login

[Giles Coochey]

Every so often recently I've seen the load on my heavily under-used dovecot server (1 mailbox) rise up to 1

A top shows imap-login to causing the issue.



Anybody else seen something like this?

# 2.2.5: /etc/dovecot/dovecot.conf
# OS: Linux 2.6.32-358.14.1.el6.x86_64 x86_64 CentOS release 6.4 (Final)
listen = *
mail_location = maildir:~/.Maildir
managesieve_notify_capability = mailto

mbox_write_locks = fcntl
namespace inbox {
  inbox = yes
  location =
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix =
}
passdb {
  driver = pam
}
plugin {
  sieve = ~/.dovecot.sieve
  sieve_dir = ~/.sieve
}
protocols = imap
service imap {
  process_limit = 2048
}
ssl_cert = </etc/pki/dovecot/certs/imap.crt
ssl_key = </etc/pki/dovecot/private/imap.key
userdb {
  driver = passwd
}
protocol lmtp {
  mail_plugins = sieve $mail_plugins
}
protocol lda {
  mail_plugins = sieve
}
protocol imap {
  mail_max_userip_connections = 50
}

--
Regards,

Giles Coochey, CCNP, CCNA, CCNAS
NetSecSpec Ltd
+44 (0) 8444 780677
+44 (0) 7983 877438
http://www.coochey.net
http://www.netsecspec.co.uk
gi...@coochey.net

I have checked /var/log/secure, /var/log/maillog, /var/log/messages and cannot see anything unusual. managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date ihave

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