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From "Serge Huber (JIRA)" <j...@apache.org>
Subject [jira] Commented: (JCR-2715) Improved join query performance
Date Tue, 30 Nov 2010 15:32:13 GMT

    [ https://issues.apache.org/jira/browse/JCR-2715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12965259#action_12965259
] 

Serge Huber commented on JCR-2715:
----------------------------------

Ok thanks. 

It is plausible that the number of results if affecting performance because from previous
traces I saw that some constraints seemed to be evaluated on the results. But I didn't get
around to testing the latest code yet. Would it be possible for your to capture some snapshots
with Yourkit or an equivalent ?

Best regards,
  Serge Huber

> Improved join query performance
> -------------------------------
>
>                 Key: JCR-2715
>                 URL: https://issues.apache.org/jira/browse/JCR-2715
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: jackrabbit-core, query
>            Reporter: Jukka Zitting
>            Assignee: Jukka Zitting
>             Fix For: 2.2.0
>
>         Attachments: SQL2SearchTest.png, ThreeWayJoinTest.png, TwoWayJoinTest.png
>
>
> Our current implementation of SQL2 join queries does not perform very well on pretty
much any non-trivial data set.

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