whats wrong with my apache?

Since i'm no good with ded servers, i had someone experienced to tweak my apache since it was crashing every few hours because of the heavy traffic that my websites recieve

I dont know what he did but now websites which recieve heavy traffic arn't loading anymore. Eg: http://dbuniverse.net doesnt load at all

but other websites dont recieve heavy traffic still work fine. Eg: http://browse-hosts.com still works.

He's not online at the moment and i'd really appreciate it if someone could help me fix this, i'm a bit familiar with ssh so give me instructions to fix this please >.<

 

 

 

 

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