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Part II: Tuning in Depth > Server Operating System - Pg. 181

CHAPTER 12 Server Operating System The operating system sits between the hardware and the web server software, trans- lating the web server's request for services into hardware actions and delivering data from the hardware back up to the web server. The server hardware has a maximum performance that is fixed by its physical specifications. You can approach this maxi- mum performance by appropriate configuration of the operating system. The question for web servers is how to configure the operating system to take requests from the network, find the correct file to return or run the correct program, and push the result back out to the network, all as fast as possible.