I recieve the next error regularly on my small MediaTemple DV server.

 Web Server (Apache) on myrootdomain.com is down
 Web Server (Apache) on myrootdomain.com has been started

 Plesk Web Server on myrootdomain.com is down
 Plesk Web Server on myrootdomain.com has been started

I recieve a minumum of one, sometimes more, each day. MediaTemple aren't being very useful as DV are self-handled. Therefore it falls in my experience to become the sysadmin. Any help could be great! I've some important sites running about this server and each time I recieve these errors I recieve about ten minutes down time although Apache restarts.

Presuming it is a a linux systemunix, you might like to try lsof (list open files). See what files get utilized around the moment your server crashes.

Be cautious though, lsof can generate lots of output, which means you better run it trough a pipe. lsof egrep -i (apacheplesk)

Or regardless of the title is from the process.