high load, Top Process

I've noticed that for the past 3 days, the top process is due to my forum on the server as stated below. This was found in WHM > CPU/Memory/MySQL Usage:

User Domain %CPU %MEM Mysql Processes
johndoe domain.com 9.12 1.00 0.8

Top Process %CPU 99.9 httpd [forum.domain.com] [/index.php?s0f746514673114554ea99f7e290414a9&showforum8]
Top Process %CPU 91.0 httpd [forum.domain.com] [/index.php?sf192df3d840aa99e4c4ccaca9784b705&showforum27]
Top Process %CPU 77.0 httpd [forum.domain.com] [/index.php?showforum15]

nobody 0.69 0.12 0.0
Top Process %CPU 99.9 /usr/local/apache/bin/httpd -DSSL
Top Process %CPU 91.0 /usr/local/apache/bin/httpd -DSSL
Top Process %CPU 77.0 /usr/local/apache/bin/httpd -DSSL
99%, 91%, and 77% are the same for both users (nobody and johndoe) Members of my board complained about the slow loading times. However, there was no network problem as I've ran traceroute/ping tests (from various locations) which yielded nothing wrong.

How could I find out why it's doing this? It's an Invision board, weird that all this happened recently.

 

 

 

 

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