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From "Alex Parvulescu (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (JCR-3282) Optimize usage of norms
Date Tue, 03 Apr 2012 12:10:23 GMT

     [ https://issues.apache.org/jira/browse/JCR-3282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Alex Parvulescu resolved JCR-3282.

       Resolution: Fixed
    Fix Version/s: 2.6

I've had some issues with a test (IndexingRuleTest#testBoost), it failed a few times.
The sort seemed to not be stable, the field that had no initial boost (so no norms) kept moving
from the first position to the last, messing with the test result.
Now it seems ok.

Fixed in revision 1308833.
> Optimize usage of norms
> -----------------------
>                 Key: JCR-3282
>                 URL: https://issues.apache.org/jira/browse/JCR-3282
>             Project: Jackrabbit Content Repository
>          Issue Type: Improvement
>          Components: indexing, jackrabbit-core
>            Reporter: Alex Parvulescu
>            Assignee: Alex Parvulescu
>             Fix For: 2.6
>         Attachments: JCR-3282.patch
> There is a very significant potential for optimizing the size of the search index.
> We have seen a case where there were multiple segments with about the same number of
nodes (roughly 10 million), but the size on disk was very different.
> One segment was 19 GB while all others where around 3 GB. The major difference was the
number of fields indexed. The large segment had significantly more fields, which resulted
in a large norms file.
> We should go through our implementation and see where norms are really necessary and
disable tracking of norms wherever possible.

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