Optimizing exim performance

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Optimizing exim performance

Hi,

Recently, I experienced that exim was slow in sending outgoing mail, it was spending a lot of time in the queue, resulting in customer complains.

I came across an article in the internet to optimize the performance of exim in the server. However, the location of the exim.conf is not in /etc/exim.conf in my server. It is /etc/exim4/update-exim4.conf.conf. I just want to confirm if this is the correct file to make the configuration changes to?

Also, one of the steps given to optimize the performance is to :

Quote:
Change how many queue runners that are spawned off. In /etc/init.d/exim change: QUEUE=5m. This ensures that a new queue runner was created every 5 minutes. How often a new queue runner needs to be configured on a server depends on its load.
However there is no /etc/init.d/exim in my server, only /etc/init.d/exim4. I assume this is the correct file to edit, however, I do not find the keyword "QUEUE" in it. How do I edit this file for this option? I only see this two variables that I think are somehow related:

Code:
QUEUERUNNER='combined'
QUEUEINTERVAL='30m'

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DOVECOT-LDA(1)							      Dovecot							    DOVECOT-LDA(1)

NAME
dovecot-lda - Dovecot's local mail delivery agent SYNOPSIS
dovecot-lda [-ek] [-a address] [-c config_file] [-d username] [-f envelope_sender] [-m mailbox] [-o setting=value] [-p path] DESCRIPTION
The dovecot-lda is a local mail delivery agent which takes mail from an MTA and delivers it to a user's mailbox, while keeping Dovecot index files up to date. Main features of the dovecot-lda are: * Mailbox indexing during mail delivery, providing faster mailbox access later * Quota enforcing by the quota plugin * Sieve language support by the Pigeonhole sieve plugin OPTIONS
Options accepted by dovecot-lda: -a address Destination address (e.g. user+ext@domain). Default is the same as username. -c config_file Alternative configuration file path. -d username Destination username. If given, the user information is looked up from userdb. Typically used with virtual users, but not neces- sarily with system users. -e If mail gets rejected, write the rejection reason to stderr and exit with status 77 (EX_NOPERM). The default is to send a rejection mail ourself. -f envelope_sender Envelope sender address. -k Don't clear all environment at startup. -m mailbox Destination mailbox (default is INBOX). If the mailbox doesn't exist, it will not be created (unless the lda_mailbox_autocreate setting is set to yes). If a message couldn't be saved to the mailbox for any reason, it's delivered to INBOX instead. -o setting=value Overrides the configuration setting from /etc/dovecot/dovecot.conf and from the userdb with the given value. In order to override multiple settings, the -o option may be specified multiple times. -p path Path to the mail to be delivered instead of reading from stdin. If using maildir the file is hard linked to the destination if pos- sible. This allows a single mail to be delivered to multiple users using hard links, but currently it also prevents deliver from updating cache file so it shouldn't be used unless really necessary. EXIT STATUS
dovecot-lda will exit with one of the following values: 0 Delivery was successful. (EX_OK) 64 Invalid parameter given. (EX_USAGE) 77 -e option was used and mail was rejected. Typically this happens when user is over quota and quota_full_tempfail = no is configured. (EX_NOPERM) 75 A temporary failure. This is returned for almost all failures. See the log file for details. (EX_TEMPFAIL) FILES
/etc/dovecot/dovecot.conf Dovecot's main configuration file. /etc/dovecot/conf.d/10-mail.conf Mailbox locations and namespaces. /etc/dovecot/conf.d/15-lda.conf LDA specific settings. /etc/dovecot/conf.d/90-plugin.conf Plugin specific settings. /etc/dovecot/conf.d/90-quota.conf Quota configuration. REPORTING BUGS
Report bugs, including doveconf -n output, to the Dovecot Mailing List <dovecot@dovecot.org>. Information about reporting bugs is avail- able at: http://dovecot.org/bugreport.html SEE ALSO
doveadm(1), dovecot(1), doveconf(1), dsync(1) Related MTA specific documentation: Postfix: postconf(5), transport(5), pipe(8) Exim: The accept router http://exim.org/exim-html-current/doc/html/spec_html/ch16.html Generic options for transports http://exim.org/exim-html-current/doc/html/spec_html/ch24.html The pipe transport http://exim.org/exim-html-current/doc/html/spec_html/ch29.html Dovecot v2.2 2011-01-16 DOVECOT-LDA(1)

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