protected function doGetStats()
{
$stats = $this->memcache->getStats();
return [Cache::STATS_HITS => $stats['get_hits'], Cache::STATS_MISSES => $stats['get_misses'], Cache::STATS_UPTIME => $stats['uptime'], Cache::STATS_MEMORY_USAGE => $stats['bytes'], Cache::STATS_MEMORY_AVAILABLE => $stats['limit_maxbytes']];
}