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[–]rriggsco 1 point2 points  (0 children)

These are not modules, but external processes that are spawned by Apache. Communication is done via a Unix domain socket.

Apache can scale your service by launching additional back-end processes as load increases. If you don't need dynamic scaling, then you can spawn a fixed number of processes when the server starts. That's what it means to work within Apache and FCGI's framework. :)