flush_page_cache addition in settings.php

gistfile1.txt

  // Wrapper class for extending MemCacheDrupal to support flushing a page's cache.
  require_once DRUPAL_ROOT . '/includes/cache.inc';
  require_once DRUPAL_ROOT . '/sites/all/modules/memcache/memcache.inc';
  class FlushPageCacheMemCacheDrupal extends MemCacheDrupal {
    function get($cid) {
      // Handle flush page cache request by deleting the cached object and returning FALSE.
      if (function_exists('flush_page_cache_requested') && flush_page_cache_requested()) {
        return FALSE;
      }

      return parent::get($cid);
    }
  }
  $conf['cache_default_class'] = 'FlushPageCacheMemCacheDrupal';