What's with this?

What's with this pop up at the top of every page?

Everything seem to be working alright, but it seems to be slow.

Notice: MemcachePool::getstats(): Server 169.197.80.98 (tcp 11211, udp 0) failed with: Connection refused (111) in require_once() (line 19 of /var/www/html/bcmain/armoire/sites/all/modules/memcache/memcache-lock.inc).