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Posted to oak-issues@jackrabbit.apache.org by "Davide Giannella (JIRA)" <ji...@apache.org> on 2016/09/19 10:11:21 UTC

[jira] [Closed] (OAK-4724) Prefetch external changes

     [ https://issues.apache.org/jira/browse/OAK-4724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Davide Giannella closed OAK-4724.
---------------------------------

bulk close for 1.5.10

> Prefetch external changes
> -------------------------
>
>                 Key: OAK-4724
>                 URL: https://issues.apache.org/jira/browse/OAK-4724
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core, documentmk
>            Reporter: Marcel Reutegger
>            Assignee: Marcel Reutegger
>              Labels: observation
>             Fix For: 1.6, 1.5.10
>
>         Attachments: OAK-4724.patch, queue.png
>
>
> In a cluster with listeners that are registered to receive external changes, pulling in external changes can become a bottleneck. While processing those external changes, further local changes are put into the observation queue leading to a system where the queue eventually fills up.
> Instead of processing external changes one after another, the implementation could prefetch them as they come in and if needed pull them in parallel.



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