Bug#511103: apache2-mpm-prefork: MPM Prefork/Itk Segmentation fault under heavy load

[Frédéric VANNIÈRE <f.vanniere@planet-work.com>]

Stefan Fritsch a écrit :
> This is https://issues.apache.org/bugzilla/show_bug.cgi?id=46467 . Try (on
> 2.6.27)
>
> echo 1024 >  /proc/sys/fs/epoll/max_user_instances
>
> where 1024 is some value larger than MaxClients, then it should work. The
> above bug report also has a patch that makes apache log an error message
> instead of segfaulting
The max_user_instances limitation comes from 2.6.27.8

I confirm that changing epoll/max_user_instances fixes the bug.

Maybe Debian should upper the default value to 1024, set it to Apache's
MaxClient or backport Apache's patch because 128 is too low for a web 
server.

Many thanks.


Frédéric.