[rt-users] Memory leak (RT 4.0.5)

[Christian Loos]

Am 18.04.2012 16:31, schrieb Tim Cutts:
>
> On 18 Apr 2012, at 13:07, Austin Denyer wrote:
>
>>
>> System:
>> RT version         4.0.5
>> Apache version     2.2.16
>> PostgreSQL version 8.4.11
>> Debian version     6.0.4
>> Kernel version     2.6.24-25-xen (64-bit)
>>
>
> I've not used the Debian packaged version - is it using mod_perl, or mod_fastcgi or mod_fcgid?  I found that using mod_fastcgi we had severe memory leak problems, so yes there does seem to be a memory leak in RT, but I don't know where.  However, I mitigated the problem by switching to mod_fcgid in the Apache config, because it has useful knobs you can tweak to tell it to start new CGI processes every so often, or after a certain number of requests have been handled.  Thus no individual RT server process now lives long enough for the memory leak to be a significant problem.  Here's my /etc/apache2/mods-enabled/fcgid.conf:
>
> <IfModule mod_fcgid.c>
>    AddHandler    fcgid-script .fcgi
>    FcgidConnectTimeout 20
>    FcgidIdleTimeout 300
>    FcgidProcessLifetime 3600
>    FcgidMaxRequestsPerProcess 1000
> </IfModule>
>
> My RT web server is an Ubuntu 10.04 VM with 2GB RAM also, on a setup with about a quarter of a million tickets.
>
> We run the MySQL database server on a separate VM.
>
> Tim
>
>
>

You can set MaxRequestsPerChild for the mpm_worker_module.
This should also affect RT if you run it with mod_perl.

-Chris