We store session data in memcache, and are currently having sporadic issues with memcache servers crashing. (The servers are still running and respond to stats requests but not get/set. Both servers crash at the same point although it could be that one crashes as a result of the other crashing.)
This occurs after we applied recent Moodle security updates. (We're on 2.7.x currently, but security patches are similar for most versions.)
There is probably no connection but just in case, I wondered if anybody else has experienced memcache server crashes recently?