[rt-users] RT 4.0.2 exim Cannot allocate memory

[John Mclean]

Thanks for your input Ruz,

I don't feel it's an Apache configuration issue as the server was
running fine on a 1/4 of the memory before the switch-over.

The memory usage is climbing steadily, looks more like a memory leak.


On 25 July 2012 15:02, Ruslan Zakirov <ruz at bestpractical.com> wrote:
> Hi,
>
> Your system is out of memory. You should lower number of apache
> processes. Setup more more memory effective configuration. Lower
> number of requests each child serves before restart. I know that
> lowering number of translations loaded into RT can lower memory
> footprint.
>
> Do you use mod_perl? Do you use FCGI?
>
> We don't know anything about your setup to help you fit RT into memory.
>
> Using sendmailpipe method is correct thing to do and recommended. You
> have less problems than with smtp, but it sure fails if your server is
> not able to run a new process.
>
> On Wed, Jul 25, 2012 at 5:33 PM, John Mclean <john.mclean at axomic.com> wrote:
>> Hi,
>>
>> We successfully reconfigured our RT server to use Gmail instead of a
>> local smtp server.
>>
>> Unfortunately we are running into 'Cannot allocate memory' errors
>> after apache consumes all the available memory, please see sample
>> error below:
>>
>> [Mon Jul 23 09:34:04 2012]
>> [crit]:<rt-4.0.2-1424-1343036044-450.5978-6-0 at ourdomain>: Could not
>> send mail with command `/usr/sbin/sendmail -oi -t`: couldn't execute
>> program: Cannot allocate memory at
>> /usr/share/request-tracker4/lib/RT/Interface/Email.pm line 448.
>>
>> The top command, with the shift M option, shows Apache as being the culprit.
>>
>> Our server is running the below software:
>>
>> RT 4.0.2
>> Exim version 4.72
>> Debian version 6.0.3
>> Apache/2.2.16 (Debian)
>>
>> The /etc/request-tracker4/RT_SiteConfig.pm perl module previously had
>> the below email configuration lines:
>>
>> Set($MailCommand , 'smtp');
>> Set($SMTPServer, 'local_email_server');
>>
>> These have now been changed to:
>>
>> Set( $MailCommand, 'sendmailpipe');
>> Set( $SendmailPath , "/usr/sbin/sendmail");
>> Set( $SendmailArguments , "-oi -t");
>>
>> Sendmail is a symlink to exim4.
>>
>> The below thread, sheds more light on the problem, sendmailpipe being
>> incompatible with exim:
>>
>> http://comments.gmane.org/gmane.comp.bug-tracking.request-tracker.user/47169
>>
>> To fix the problem could we use the below configuration in the
>> /etc/request-tracker4/RT_SiteConfig.pm file?
>>
>> Set($MailCommand , 'sendmail');
>> Set($SendmailArguments , "-bm -- <your email address>");
>> Set($SendmailPath, "/usr/sbin/exim4");
>> Set($NotifyActor, 1);
>>
>> Sourced from: http://requesttracker.wikia.com/wiki/ManualInstallation
>>
>> Or should we use the Apache prefork MPM change in:
>>
>> http://comments.gmane.org/gmane.comp.bug-tracking.request-tracker.user/47169
>>
>> Any other suggestions, will be greatly appreciated.
>>
>> Thanks
>>
>> John
>
>
>
> --
> Best regards, Ruslan.