function perform(&$request, &$response)
  {
    parent :: perform($request, $response);

    $full_page_cache_manager = new full_page_cache_manager();
    $partial_page_cache_manager = new partial_page_cache_manager();
    $image_cache_manager = new image_cache_manager();

    $full_page_cache_size = $this->_format_size($full_page_cache_manager->get_cache_size());
    $this->view->set('full_page_cache_size', $full_page_cache_size);

    $partial_page_cache_size = $this->_format_size($partial_page_cache_manager->get_cache_size());
    $this->view->set('partial_page_cache_size', $partial_page_cache_size);

    $image_cache_size = $this->_format_size($image_cache_manager->get_cache_size());
    $this->view->set('image_cache_size', $image_cache_size);

    $template_cache_size = $this->_format_size($this->_get_template_cache_size());
    $this->view->set('template_cache_size', $template_cache_size);

    $general_cache_size = $this->_format_size($this->_get_general_cache_size());
    $this->view->set('general_cache_size', $general_cache_size);

    $ini_cache_size = $this->_format_size($this->_get_ini_cache_size());
    $this->view->set('ini_cache_size', $ini_cache_size);
  }
 function perform(&$request, &$response)
 {
     parent::perform($request, $response);
     $full_page_cache_manager = new full_page_cache_manager();
     $partial_page_cache_manager = new partial_page_cache_manager();
     $image_cache_manager = new image_cache_manager();
     $full_page_cache_size = number_format($full_page_cache_manager->get_cache_size() / 1024) . " KB";
     $this->view->set('full_page_cache_size', $full_page_cache_size);
     $partial_page_cache_size = number_format($partial_page_cache_manager->get_cache_size() / 1024) . " KB";
     $this->view->set('partial_page_cache_size', $partial_page_cache_size);
     $image_cache_size = number_format($image_cache_manager->get_cache_size() / 1024) . " KB";
     $this->view->set('image_cache_size', $image_cache_size);
     $template_cache_size = number_format($this->_get_template_cache_size() / 1024) . " KB";
     $this->view->set('template_cache_size', $template_cache_size);
     $ini_cache_size = number_format($this->_get_ini_cache_size() / 1024) . " KB";
     $this->view->set('ini_cache_size', $ini_cache_size);
 }