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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2356) Enable setting the terms index divisor used by IndexWriter whenever it opens internal readers
Date Mon, 29 Mar 2010 11:23:27 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12850887#action_12850887
] 

Michael McCandless commented on LUCENE-2356:
--------------------------------------------

I won't have any time to take this any time soon :)  So if anyone has the itch, jump!

> Enable setting the terms index divisor used by IndexWriter whenever it opens internal
readers
> ---------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2356
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2356
>             Project: Lucene - Java
>          Issue Type: Bug
>            Reporter: Michael McCandless
>             Fix For: 3.1
>
>
> Opening a place holder issue... if all the refactoring being discussed don't make this
possible, then we should add a setting to IWC to do so.
> Apps with very large numbers of unique terms must set the terms index divisor to control
RAM usage.
> (NOTE: flex's RAM terms dict index RAM usage is more efficient, so this will help such
apps).
> But, when IW resolves deletes internally it always uses default 1 terms index divisor,
and the app cannot change that.  Though one workaround is to call getReader(termInfosIndexDivisor)
which will pool the reader with the right divisor.

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