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From "Grant Ingersoll (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1810) Add a LATENT FieldSelectorResult
Date Fri, 14 Aug 2009 22:13:15 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743469#action_12743469
] 

Grant Ingersoll commented on LUCENE-1810:
-----------------------------------------

Patch would be great.

> Add a LATENT FieldSelectorResult
> --------------------------------
>
>                 Key: LUCENE-1810
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1810
>             Project: Lucene - Java
>          Issue Type: Wish
>          Components: Search
>    Affects Versions: 2.4
>            Reporter: Tim Smith
>
> I propose adding LATENT FieldSelectorResult
> this would be similar to LAZY_LOAD except that it would NEVER cache the stored value
> This will be useful for very large fields that should always go direct to disk (because
they will take so much memory)
> when caching Documents returned from a Searcher, the large field may be initially requested
as LAZY_LOAD, however once someone reads this field, it will then get locked into memory.
if this Document (and others like it) are cached, it can start to use a very large amount
of memory for these fields
> Contract for FieldSelectorResult.LATENT should be that it will always be pulled direct
from the IndexInput and never be persisted in memory as part of a Fieldable
> I could prepare a patch if desired

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