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https://issues.apache.org/jira/browse/OAK-2801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14565427#comment-14565427
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Michael Dürig commented on OAK-2801:
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Committed patch to trunk at http://svn.apache.org/r1682555
> Clear excess references before cleanup
> --------------------------------------
>
> Key: OAK-2801
> URL: https://issues.apache.org/jira/browse/OAK-2801
> Project: Jackrabbit Oak
> Issue Type: Sub-task
> Components: segmentmk
> Reporter: Michael Dürig
> Assignee: Michael Dürig
> Labels: compaction, gc, resilience
> Fix For: 1.3.0, 1.2.3, 1.0.15
>
> Attachments: OAK-2801.patch, with-OAK-2801.png, without-OAK-2801.png
>
>
> {{FileStore#cleanup}} would be more efficient when getting rid of as much
> references as possibly beforehand. Excess references are contributed by the
> current {{TarWriter}} instance and segment cache in {{SegmentTracker}}.
> Those excess references turn out to be especially harmful with many
> concurrent writers continuously writing to the repository. Starting with a
> certain write load clean up will become completely blocked.
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