Should i upgrade my PHP to 5.4.14? Or is it going to break anything?
You can setup a cron to update it?Easyapache installs the older 2.X release of Xcache. It's better to install 3.0.1 direct via command line
# wget http://xcache.lighttpd.net/pub/Releases/3.0.1/xcache-3.0.1.tar.gz
# tar -xzvf xcache-3.0.1.tar.gz
# cd xcache-3.0.1
# phpize --clean && phpize
# ./configure --enable-xcache
# make install
and then add extension=xcache.so and your xcache settings to php.ini and reload apache
As MattW can confirm, we have ran that very setup + every other variation. Performance depends on allot of variables, there is no one (this is the best) solution, regardless of what data people will push. Try several and use what works best for your setup/build. And even then it may come down to what "feels" good to you, regardless of the data.