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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2829) improve termquery "pk lookup" performance
Date Wed, 22 Dec 2010 19:45:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12974354#action_12974354
] 

Robert Muir commented on LUCENE-2829:
-------------------------------------

bq. For example, better term dict code will make this issue (somewhat hackish, admit it?)
irrelevant. 

Right, it is hackish, but what is a worse hack is wasted seeks in our next 3.1 release because
we can't
keep scope under control and fix small problems without rewriting everything, which means
less 
gets backported to our stable branch.

Anyway, I'm just gonna mark this won't fix so I don't have to deal with it anymore.

> improve termquery "pk lookup" performance
> -----------------------------------------
>
>                 Key: LUCENE-2829
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2829
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Robert Muir
>         Attachments: LUCENE-2829.patch
>
>
> For things that are like primary keys and don't exist in some segments (worst case is
primary/unique key that only exists in 1)
> we do wasted seeks.
> While LUCENE-2694 tries to solve some of this issue with TermState, I'm concerned we
could every backport that to 3.1 for example.
> This is a simpler solution here just to solve this one problem in termquery... we could
just revert it in trunk when we resolve LUCENE-2694,
> but I don't think we should leave things as they are in 3.x

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