How can I check whether my wordpress site use Xcache to cache its content? How to verify it? Can't use the xcache admin because I also have a forum using ipboard. That forum use xcache. So, the xcache admin always show some usage.
xcache is an opcode accelerator it does not cache content. (Varnish, nginx or similar would do that) There is an admin page to get statistics on it. See http://xcache.lighttpd.net/wiki/InstallAdministration#HowtoInstallXCacheAdministrationPage