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Posted to dev@lucene.apache.org by "Shai Erera (JIRA)" <ji...@apache.org> on 2013/03/18 12:12:18 UTC

[jira] [Commented] (LUCENE-4847) Sorter API: Fully reuse docs enums

    [ https://issues.apache.org/jira/browse/LUCENE-4847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13605019#comment-13605019 ] 

Shai Erera commented on LUCENE-4847:
------------------------------------

looks good!
                
> Sorter API: Fully reuse docs enums
> ----------------------------------
>
>                 Key: LUCENE-4847
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4847
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>             Fix For: 4.3
>
>         Attachments: LUCENE-4847.patch
>
>
> SortingAtomicReader reuses the filtered docs enums but not the wrapper. In the case of SortingAtomicReader this can be a problem because the wrappers are heavyweight (they load the whole postings list into memory), so an index with many terms with high freqs will make the JVM allocate a lot of memory when browsing the postings lists.

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