Just a heads up for anyone using Debian and installing/compiling OpenLiteSpeed 1.3. On 1.2.9 to use php's built in opcache you had to add Code: zend_extension=/usr/local/lsws/lsphp5/lib/php/extensions/no-debug-non-zts-20121212/opcache.so to the php.ini. With 1.3 you MUST remove this from the php.ini since you now compile it in at run time as an option like you can with xcache, memcache, etc. If you fail to do this, you will probably run into the same problem I had - the site becomes either non-responsive or only loads partially. Once I removed the line from php.ini it resumed working fine.