I have recently upgraded our server to a new server (2-12core AMD CPUs, 12Gb Ram, windows server 2008, exchange 2010) and I run a company web app using IIS and PHP/MySQL. The server gets really slow occasionally (loading pages on the web app) but I don't know how to find out if it's the network, server hardware, IIS, PHP or MySQL causing the problem. What is the best way to determine where the bottleneck is?
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