Cbbackupmgr merge takes a lot of time

cbbackupmgr merge takes a lot of time. It has been running for more than 5 hours and it shows the same status in .merge_status file

  "merge_dir": "/home/azuser/couchbase_backup_data/incr_bucket/merge_archive/2020-04-21T18:20:04/incr_bucket/.merge",
  "name": "2020-04-23T17_32_05.549326531+01_00",
  "merging": [
  "initial_merge_complete": false,
  "dir_removal_complete": false

First backup has 16 million records in the bucket. Is such a kind of time expected?

Couchbase 6.0.x
VM spec where merge is run - 4 core cpu, 8 gb ram

Can anyone please help to debug?

Hello Vishnu,

Merge in Couchbase Server 6.0.X can be slow, the good new is that in Couchbase Server 6.5.0 it should be a lot faster. I would recommend upgrading and using the 6.5.0 to do the merge.

Kind regards,

Thank you Patrick. I’ll try that and come back.

There was a small bug in 6.5.0 where merge would fail with large data sets, which is fixed in 6.5.1. Please use that version.

I’ve tried 6.5.0 Patrick and i should say it is amazing. Backup, merge and restore takes only 1/5 of what it used to take. Thank you very much :slightly_smiling_face:


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Is this the error you were referring to Patrick?

Error merging data: no such table: partition830


Upgraded to 6.5.1 and the above merge error is gone :slight_smile:

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Yep that was the merge issue I was talking about glad to see it’s working for you.