I am running couchbase enterprise edition version 6.6.2 on Windows server 2016 standard edition. I have two buckets called A and B. Bucket A is configured to run with enable_shared_bucket_access = true, my sync gateway creates new documents in bucket A, a bunch of services change and delete these documents.
XDCR replicates documents from bucket A to bucket B. All changes to documents in bucket A are replicated to bucket B, except deletions in bucket A are not replicated to bucket B. When documents in bucket B get older than 62 days they get deleted by an external service.
Over time I noticed that 93% of the documents in bucket B are binary documents! My own documents are in JSON, I don’t use any kind of binary documents in my solution. This leads me to the conclusion that these binary documents are some internal couchbase documents.
Here is a example of these binary documents
{ "$1": { "cas": 1667520921496387584, "expiration": 0, "flags": 50331648, "id": "_sync:rev:00001abd-1f99-4b4e-a695-d11574ea9ed8:0:", "type": "base64" }, "pa": "<binary (1 b)>" }, { "$1": { "cas": 1667484959445614592, "expiration": 0, "flags": 50331648, "id": "_sync:rev:00001abd-1f99-4b4e-a695-d11574ea9ed8:34:2-d3fb2d58672f853d98ce343d3ae84c1d", "type": "base64" }, "pa": "<binary (1129 b)>" } My issue with these documents is that they increase dramatically over time! and they don’t get cleaned up automatically! So they just grow and consume resources!
- What are these documents used for?
- Why aren’t these documents cleaned automatically?
- Is it safe to simply delete these documents?
- Is this a bug or a feature? :-)
Regards, Siraf
