We are seeing strange behavior with one of our servers in Couchbase cluster. Network traffic on that server is 10 times greater than on the remaining servers. We were thinking that this can be caused by replication but we’ve crossed that out because the traffic is between cache servers and web servers.
This problems leads to situation when we are getting timeouts from the couchbase client library when our site is under heavy load (network path to affected server seems to be overloaded).
What’s even more strange is fact that we didn’t have this problem in the past.
We are using PHP SDK and our connection string contains all servers.