High CPU Usage (erl, sigar_port, memcached)

We are experiencing an issue with Couchbase Server CE 6.6.0 is causing the machine to run at 100% CPU usage on one of our VMs.

We have two identical VMs and the issue is only seen on one of the machines. They are separate nodes and it appears memcached, erl and sigar_port keep spiking causing the machine to be unresponsive. We were previously running 6.5.0 and updated to CE 6.6.0 to see if the issue would be resolved without success. Currently, there are only a limited number of documents and no new documents are being added.

We cannot collect the log files through the UI as it’s timing out during the collection.

Apologies for the delay here. I see you’re running quite an old version of Couchbase Server and we made significant improvements in this area with 7.x and above. It won’t have anything to do with the number of documents. Is it possible for you to upgrade?