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« on: June 07, 2011, 09:47:02 pm »
APC and Xcache are applications that speed up PHP generally. They are not related to Feng per se, but they could certainly speed up the PHP aspects of Feng. Depending upon how you have Apache/PHP compiled, they can be very easy to install (sometimes as easy as apt-get or yum), but they do need to be installed on the server; they have nothing to do with Feng code... other than having the potential to speed up Feng's PHP.
Optimizing MySQL can be dicey, but it could also be as easy as changing settings in your my.cnf config. Scripts like day32.com/MySQL/ can give suggestions. Mileage can vary. If you have your server hosted at an ISP, they'll usually accept a ticket for both installing the opcode and for tuning mysql for performance. Someone who is good at tuning mysql can do wonders for performance. APC and Xcache can also be a good kick in the pants for php, but be aware that some php applications do not run well with one or the other. Kind of a trial and error thing, but if they don't run well, you'll be able to tell easily. Only an issue if you have other php applications running alongside Feng.