Well removing high load on a web application really depends on many things. Poor coding, lots of traffic, how you have sql setup will all play a role in performance.

I would check the php-cgi application.

Are you getting a lot of web traffic?

Run the below command and report with what you see:

Code:

ps auxw| awk '{print $6" "$0}' | grep MEM | grep -v grep && ps auxw| awk '{print $6" "$0}' | sort -n | tail -5

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