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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2016/02/12 16:42:18 UTC

[jira] [Created] (OAK-4015) Expedite commits from the compactor

Michael Dürig created OAK-4015:
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             Summary: Expedite commits from the compactor
                 Key: OAK-4015
                 URL: https://issues.apache.org/jira/browse/OAK-4015
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: segmentmk
            Reporter: Michael Dürig
             Fix For: 1.6


Concurrent commits during compaction cause those to be re-compacted. Currently it seems that the compaction thread can end up waiting for some time to acquire the commit lock [1], which in turn causes more commits to pile up to be re-compacted. I think this could be improved by tweaking the lock such that the compactor could jump ahead of the queue. I.e. use a lock which can be acquired in expedited mode. 

[1] SegmentNodeStore#commitSemaphore



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