[TriLUG] FC2, Dovecot, Squirrelmail = Crash

[Jason Tower]

> Also, here's another wrinkle in the mix.  When we were testing, we
> repeatedly crashed Apache in this way (mostly on purpose) and then
> were doing a "service httpd restart" (essentially just a kill and
> restart). Eventually, Apache couldn't restart itself, complaining of
> insufficient space on the device, and referencing semaphores. 
> Presumably, the box had run out of semaphores because Apache and
> PHP's threading had been screwed up in some way.  A reboot fixed it. 
> I don't think that really provides any insight into the situation,
> but does anyone know of a way to clear those semaphores?
>
> Aaron S. Joyner

that's a well known redhat/apache issue, i used see it on my rh9 
webservers that had extended (100+ day) uptimes.  afaik, nothing short 
of a reboot will fix it.  none of my mandrake boxes seem to be affected 
by it though.

jason