Hi list readers,
I have a problem with our imap server. My users complain about timeouts
when connecting to the server. We have nagios checking the status of the
imap port. Most of the time it reports success and response times of less
than one second. But sometimes the response takes longer than 10 seconds
and then nagios reports a timeout.
I don't think that the machine is overloaded, it's a dual xeon 2,8 ghz
with 4 gb of ram and a gigabit link.
I am running Gentoo Linux with gentoo-sources as kernel (version 2.6.18),
cyrus-imapd-2.2.12-r4 (autocreate patch applied). I have no iptables
rules activated.
Because nagios just connects and disconnects right away, I don't think
that the problem has something to do with authentication. However I am
using saslauthd -> pam -> pam_ldap -> Active Directory.
How can I find out what cyrus is doing right at the time when those
timeouts happen or where the thing is hanging?
Thanks for reading and any tips and hints, config files are below.
Greetings,
Timo
Here is my /etc/cyrus.conf (IP address changed):
##############
# /etc/cyrus.conf
#
START {
# Do not delete this entry!
recover cmd="ctl_cyrusdb -r"
# This is only necessary if using idled for IMAP IDLE.
idled cmd="idled"
}
SERVICES {
# Add or remove based on preferences.
imap cmd="imapd" listen="123.123.123.123:imap2" prefork=0
imap cmd="imapd -C /etc/imapd.conf.lo" listen="127.0.0.1:imap2"
prefork=0
pop3 cmd="pop3d" listen="123.123.123.123:pop-3" prefork=0
pop3 cmd="pop3d -C /etc/pop3d.conf.lo" listen="127.0.0.1:pop-3"
prefork=0
# Don't forget to generate the needed keys for SSL or TLS
# (see doc/html/install-configure.html).
imaps cmd="imapd -s" listen="123.123.123.123:imaps" prefork=0
pop3s cmd="pop3d -s" listen="123.123.123.123:pop3s" prefork=0
sieve cmd="timsieved" listen="123.123.123.123:sieve" prefork=0
sieve cmd="timsieved -C /etc/imapd.conf.lo" listen="127.0.0.1:sieve"
prefork=0
# at least one LMTP is required for delivery
#lmtp cmd="lmtpd" listen="lmtp" prefork=0
lmtpunix cmd="lmtpd" listen="/var/imap/socket/lmtp" prefork=0
# this is only necessary if using notifications
#notify cmd="notifyd" listen="/var/imap/socket/notify" proto="udp"
prefork=0
}
EVENTS {
# This is required.
checkpoint cmd="ctl_cyrusdb -c" period=30
# This is only necessary if using duplicate delivery suppression.
delprune cmd="ctl_deliver -E 3" period=1440
# This is only necessary if caching TLS sessions.
tlsprune cmd="tls_prune" period=1440
# create squat indexes for faster searches
squatter cmd="squatter -r -s" at=0400
}
#
########## end of /etc/cyrus.conf
And here is my /etc/imapd.conf:
#############
# /etc/imapd.conf
#
# when you change these directories (read the docs).
configdirectory: /var/imap
partition-default: /var/spool/imap
sievedir: /var/imap/sieve
tls_ca_file: /etc/ssl/cacert.pem
tls_cert_file: /etc/ssl/crt.pem
tls_key_file: /etc/ssl/key.pem
hashimapspool: yes
allowanonymouslogin: no
# only on localhost /etc/imapd.conf{,.lo}
allowplaintext: no
autocreatequota: 102400
createonpost: yes
sasl_mech_list: LOGIN PLAIN
unixhierarchysep: 1
lmtp_downcase_rcpt: 1
# auxprop only on localhost /etc/imapd.conf{,.lo}
#sasl_pwcheck_method: saslauthd auxprop
sasl_pwcheck_method: saslauthd
#sasl_auxprop_plugin: sasldb
allowapop: 0
#
######## end of /etc/imapd.conf
----
Cyrus Home Page: http://cyrusimap.web.cmu.edu/
Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki
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