Apache just stopped :O!!

[rauschr]

you have a find in apache2.conf
uncomment this lines
and add ExtendedStatus On

<ifmodule mod_status.c>
<location /server-status>
SetHandler server-status
</location>
....

after you'll see the apache tread, if you type a webbrowser your ip and /server-status
examp. : 87.229.2.55/server-status
some website make a lot ordering width not too much traffic.
they run out it apache threads
you can find the domain in the server-status list (80%),what many times can be found
that is a advertisement server swich off!

or DOS you are the victim of an attack