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From "Mark Miller (JIRA)" <>
Subject [jira] Commented: (LUCENE-1052) Add an "termInfosIndexDivisor" to IndexReader
Date Tue, 11 Nov 2008 01:39:44 GMT


Mark Miller commented on LUCENE-1052:

Should any further improvements be in a new issue? It confuses tracking in changes.txt to
rework issues after placing them in changes doesnt it? The issues could then be linked.

> Add an "termInfosIndexDivisor" to IndexReader
> ---------------------------------------------
>                 Key: LUCENE-1052
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Index
>    Affects Versions: 2.2
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>            Priority: Minor
>         Attachments: LUCENE-1052.patch, LUCENE-1052.patch, termInfosConfigurer.patch
> The termIndexInterval, set during indexing time, let's you tradeoff
> how much RAM is used by a reader to load the indexed terms vs cost of
> seeking to the specific term you want to load.
> But the downside is you must set it at indexing time.
> This issue adds an indexDivisor to TermInfosReader so that on opening
> a reader you could further sub-sample the the termIndexInterval to use
> less RAM.  EG a setting of 2 means every 2 * termIndexInterval is
> loaded into RAM.
> This is particularly useful if your index has a great many terms (eg
> you accidentally indexed binary terms).
> Spinoff from this thread:

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