[rt-users] RT Sending Email too SLOW

[Kenneth Marshall]

It sounds like all of your problems are DNS related. Instead
of disabling the lookups everywhere because they are busted,
if you fixed them it would all just work. Barring that, you
will need to disable the DNS lookup that is causing the slow
mail problem. Good luck.

Cheers,
Ken

On Thu, Dec 09, 2010 at 09:48:56PM +0000, Naresh Maharaj wrote:
> Hi
> 
> We really need some help resolving the slow email issue.
> I have been researching this for over 2 weeks now before calling our to
> RT_Users.
> I have searched all of the below,
> 
> http://wiki.bestpractical.com/
> http://gossamer-threads.com/lists/rt/
> http://www.google.com/
> 
> and much wider across the Internet. Almost given up!!
> 
> ++Description:
> Overall there are no issues with email leaving RT - email reaches all
> destinations
> There are no issues raising tickets into the queue via email.
> Overall speed of moving around RT Web front end is fast / acceptable
> 
> ++Issue:
> replying to a ticket takes up to 30 seconds to complete and sending the
> email in some cases up to 1 min.
> this is simply prohibitive to use in a professional setup.
> 
> ++Other Issues:
> Squirrel Mail (Linux Web Mail) has the same issue, up to 30 seconds to send
> an email - no solution
> SSH to shell remotely same problem 30s - Now resolved by removing the DNS
> lookup: /etc/ssh/sshd_config  [UseDNS no]
> SFTP - Slow 30 sec - fixed by line above
> Sendmail takes 30 sec to send an email from command line test an issue we
> have had with php apps for over a year - now resolved by :
> Edit the sendmail.cfg
> 
> Was:
> # pass to name server to make hostname canonical
> R$* $| $* < @ $* > $*          $: $2 < @ $[ $3 $] > $4
> 
> Now:
> # pass to name server to make hostname canonical
> #R$* $| $* < @ $* > $*          $: $2 < @ $[ $3 $] > $4
> 
> OR
> sendmail.mc
> Add:
> FEATURE(`nocanonify')dnl
> 
> then rebuiuld sendmail using m4
> 
> Sendmail now blistering fast.
> 
> ++RT mail Configuration:
> Previously I was using sendmailpipe
> $MailCommand = 'sendmailpipe';
> $SendmailArguments = "-oi -t";
> $SendmailPath = "/usr/sbin/sendmail";
> 
> Now that I have confirmed that Sendmail is NOT the issue I am now using:
> $MailCommand = 'sendmailpipe';
> #$SendmailArguments = "-oi -t";
> $SendmailArguments = "-oi -ODeliveryMode=b -OErrorMode=m";
> $SendmailPath = "/usr/sbin/sendmail";
> 
> Also have soft link:
> /etc/smrsh/rt-mailgate -> /opt/rt3/bin/rt-mailgate
> 
> Note sure what else to test.
> 
> The common denominator here is Apache Http
> So here is the conf entry for RT:
> 
> 
> [root at caitanya conf]# diff httpd.conf httpd.conf.working.20101126
> 997,1015d996
> < Alias /rt "/opt/rt3/share/html"
> < PerlModule Apache::DBI
> < PerlRequire /opt/rt3/bin/webmux.pl
> < <Directory /opt/rt3/share/html>
> <   AllowOverride All
> <   Options ExecCGI FollowSymLinks
> <   <IfModule mod_access.c>
> <         Order allow,deny
> <       Allow from all
> <   </IfModule>
> < </Directory>
> <
> < <Location /rt>
> <   RewriteEngine On
> <   RedirectMatch permanent (.*)/$ $1/index.html
> <   AddDefaultCharset UTF-8
> <   SetHandler perl-script
> <   PerlHandler RT::Mason
> < </Location>
> 
> Appreciate any help that one can give.
> Its the only issue stopping us from moving RT from test environment to
> production.
> 
> 
> Naresh Maharaj,
> 
> Hewitt & May (Shirtmakers) Ltd
> email: info at hewittandmay.com
> web: http://www.hewittandmay.co.uk