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Posted to notifications@couchdb.apache.org by "Nick Vatamaniuc (JIRA)" <ji...@apache.org> on 2016/03/31 17:48:25 UTC

[jira] [Created] (COUCHDB-2979) Replicator manager attempts to checkpoint too frequently

Nick Vatamaniuc created COUCHDB-2979:
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             Summary: Replicator manager attempts to checkpoint too frequently
                 Key: COUCHDB-2979
                 URL: https://issues.apache.org/jira/browse/COUCHDB-2979
             Project: CouchDB
          Issue Type: Bug
            Reporter: Nick Vatamaniuc


Current checkpoint interval is set to 5 seconds. That works well for a few replications but when there are thousands of them it ends up being an attempt every few milliseconds or so.

Moreover to decide on ownership (in order to keep on replication running per cluster) each replication during an attempted checkpoint uses a gen_server call to replicator manager. Those usually are fast (I bench-marked at a 100-200 usec) however if replicator manager is busy (say stuck fetching large filter documents when computing replication ids), none of the replication would be able to checkpoint and make progress.



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