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Posted to oak-issues@jackrabbit.apache.org by "Michael Dürig (JIRA)" <ji...@apache.org> on 2016/09/12 16:06:20 UTC

[jira] [Resolved] (OAK-4635) Improve cache eviction policy of the node deduplication cache

     [ https://issues.apache.org/jira/browse/OAK-4635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Dürig resolved OAK-4635.
--------------------------------
    Resolution: Fixed

> Improve cache eviction policy of the node deduplication cache
> -------------------------------------------------------------
>
>                 Key: OAK-4635
>                 URL: https://issues.apache.org/jira/browse/OAK-4635
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: segment-tar
>            Reporter: Michael Dürig
>            Assignee: Michael Dürig
>              Labels: perfomance
>             Fix For: Segment Tar 0.0.12
>
>         Attachments: OAK-4635.m, OAK-4635.pdf
>
>
> {{NodeCache}} uses one stripe per depth (of the nodes in the tree). Once its overall capacity (default 1000000 nodes) is exceeded, it clears all nodes from the stripe with the greatest depth. This can be problematic when the stripe with the greatest depth contains most of the nodes as clearing it would result in an almost empty cache. 



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