Couchbase pod consumes high CPU and memory continously. on idle state

Running a couchbase single node cluster on kubernetes, utilization gets as high as 7CPU, 7Gi Mem on idle state.
inside the container memcached process is consuming 600% CPU and utilization does not come down even after pod is restarted.

why is memcached using 600% cpu continously on idle state. is there a way to free memory and other resources.

couchbase version 6.6.0- CE, observed same on EE as well.
cluster has 10 buckets(with indexes present)
POD Resources,
CPU limit: N/A
MEM limit: 10 Gi

Please let me know if more information is required.