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https://issues.apache.org/jira/browse/OAK-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger updated OAK-4528:
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Attachment: queue-oak-4715.png
> diff calculation in DocumentNodeStore should try to re-use journal info on
> diff cache miss
> ------------------------------------------------------------------------------------------
>
> Key: OAK-4528
> URL: https://issues.apache.org/jira/browse/OAK-4528
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, documentmk
> Reporter: Vikas Saurabh
> Assignee: Marcel Reutegger
> Priority: Minor
> Labels: observation, resilience
> Fix For: 1.6, 1.5.6
>
> Attachments: queue-oak-4715.png, queue.png
>
>
> Currently, diff information is filled into caches actively (local commits
> pushed in local_diff, externally read changes pushed into memory_diff). At
> the time of event processing though, the entries could have already been
> evicted.
> In that case, we fall back to computing diff by comparing 2 node-states which
> becomes more and more expensive (and eventually fairly non-recoverable
> leading to OAK-2683).
> To improve the situation somewhat, we can probably try to consult journal
> entries to read a smaller-superset of changed paths before falling down to
> comparison.
> /cc [~mreutegg], [~chetanm], [~egli]
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