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From "Jukka Zitting (JIRA)" <j...@apache.org>
Subject [jira] Updated: (JCR-2715) Improved join query performance
Date Tue, 30 Nov 2010 10:48:12 GMT

     [ https://issues.apache.org/jira/browse/JCR-2715?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jukka Zitting updated JCR-2715:
-------------------------------

    Attachment: SQL2SearchTest.png

Yes, also non-join SQL2 query performance is now significantly better. The attached SQL2SearchTest
graph shows the performance of a simple non-join SQL2 query that selects 100 nodes out of
a set of 10k nodes using a simple property constraint. The performance improvement is pretty
impressive, from 9740ms to 189ms per 100 queries.

> 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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