Floppy wrote:
Not yet, how do they work and how can i install (and configure) one of them?
As you are on Etch.
Code:
$ sudo apt-get install php5-xcache
And just restart Apache after that. You might also look at /etc/php/conf.d/xcache.ini to fine tune your settings (like increasing the cache size since you are running a linode 1440).
Those op-code cache/optimisers basically caches the parsed and compiled PHP byte code in memory so there is no need to re-parse/compile again for subsequent requests. They do a bit more like runtime optimisation and share memory API but they are usually a bit more experimental.