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From "Marcel Reutegger (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (OAK-3259) Optimize NodeDocument.getNewestRevision()
Date Mon, 24 Aug 2015 12:52:46 GMT

     [ https://issues.apache.org/jira/browse/OAK-3259?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Marcel Reutegger resolved OAK-3259.
-----------------------------------
    Resolution: Fixed

Introduced a new method {{NodeDocument.getAllChanges()}} which returns the {{_revisions}}
and {{_commitRoot}} revisions in descending order. The implementation performs lazy loading
of previous documents as needed.

Implemented in trunk: http://svn.apache.org/r1697373

> Optimize NodeDocument.getNewestRevision()
> -----------------------------------------
>
>                 Key: OAK-3259
>                 URL: https://issues.apache.org/jira/browse/OAK-3259
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core, mongomk
>            Reporter: Marcel Reutegger
>            Assignee: Marcel Reutegger
>              Labels: performance
>             Fix For: 1.3.5
>
>
> Most of the time NodeDocument.getNewestRevision() is able to quickly identify the newest
revision, but sometimes the code falls to a more expensive calculation, which attempts to
read through available {{_revisions}} and {{_commitRoot}} entries. If either of those maps
are empty, the method will go through the entire revision history.



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