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Posted to notifications@couchdb.apache.org by "Nick Vatamaniuc (JIRA)" <ji...@apache.org> on 2017/04/21 19:22:04 UTC

[jira] [Created] (COUCHDB-3389) Bring back jittered delay during replication shard scan

Nick Vatamaniuc created COUCHDB-3389:
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             Summary: Bring back jittered delay during replication shard scan
                 Key: COUCHDB-3389
                 URL: https://issues.apache.org/jira/browse/COUCHDB-3389
             Project: CouchDB
          Issue Type: Bug
            Reporter: Nick Vatamaniuc


When we switched to using mem3 db for shard discovery we dropped jittered delay during shard scan. On a large production system with thousands of replicator dbs, back to back shard notification, which spawn change feeds can cause performance issues.

https://github.com/apache/couchdb/blob/884cf3e55f77ab1a5f26dc7202ce21771062eae6/src/couch_replicator_manager.erl#L940-L946



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