Since switching to fCGI instead of Apache handler to make things easier with permissions, Zend Opcache is caching things differently. When using Apache handler, the cached scripts would continue to increase and so would cache hits (this could reach hundreds of millions). Using fCGI, cached scripts seem to reset and cache hits also drop to 0 and increases again. You can see here, Refreshing 2 minutes later, Is this intended behaviour? Thank you.