In production we have the following setup…
1) 3 couch base servers in a cluster
2) We have a Data Bucket "retailmall-session"
3) Each node for “retailmall-session” has bucket type (couchbase), RAM (2048 MB [total 6144 MB (2048 MB x 3 nodes)]), Replica Set (2), Reader/Writer (5), Compaction set to 30%.
So far we have Item Count as (218850) with RAM/Quota Usage (239MB /6GB), but the Data/Disk Usage is showing 22GB /27.3GB. We have set the expiration time as 30 minutes for each item we create/modify.
Why is that disk usage keep on growing day-by-day? We know that our http session object we store per item is no more than 3-6kb.
Why is the disk size growing ?