From cloud provider:
We are experiencing an issue with Memcache availability beginning at November 6, 2017 at 12:30 pm US/Pacific.
Current data indicate(s) that all projects using Memcache are affected by this issue.
Posted 4 months ago. Nov 06, 2017 - 13:40 PST
We are experiencing downtime throughout all services. Our cloud provider is currently in an outage. We are waiting to hear back from them on the status of the issue.