we have a 4 node cluster, with 24 GB RAM, out of which 18GB has been given to couchbase with zero replicaion. We have a approx 10M of records in this cluster with ~2.5M/hour and expire old items. My RAM Usage which is ~72GB is getting full every ~12 days, and i need to restart the cluster to fix this. After restart again the RAM usage is back to ~20GB.
Can someone please help to understand the reason for it.
FYI : Auto Compaction is set to 40% fragment level and Meta Data Purge Interval is set to 1 Day, – which we reduced to do 2 hours. But it didn’t help.