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https://issues.apache.org/jira/browse/OAK-4605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davide Giannella closed OAK-4605.
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Bulk close for 1.5.7
> Separate persistent cache for diff and local_diff
> -------------------------------------------------
>
> Key: OAK-4605
> URL: https://issues.apache.org/jira/browse/OAK-4605
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, documentmk
> Reporter: Marcel Reutegger
> Assignee: Marcel Reutegger
> Labels: observation
> Fix For: 1.6, 1.5.7
>
> Attachments: OAK-4605.patch
>
>
> The DocumentNodeStore currently uses a single persistent cache for all types
> (node, nodeChildren, diff, etc.). With this setup it is not possible to
> assign a specific amount of disk space for some cache type(s). If there are
> many inserts for one cache type, entries of another type may become
> unavailable. In practice this can be a problem for the local_diff cache
> entries that are important for efficient node state comparison.
> Separating the diff and local_diff cache entries would also allow for
> different configuration options like compression and different behaviour when
> the async write back queue is full.
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