Linux server optimization [Urgent]

I have a linux based dedicated server with centos and whm. Traffic is gradually increasing. When I am changing max connections, traffic increases but it gets static after sometime. I want you to analyse the server. Optimize it to change max connections/ httpd connections/ php handlers so that it can handle double the traffic. Bid only if you can start working right now. I dont think it will take more than 30 minutes to fix the issue. Ill provide team-viewer access of my system to fix the problem