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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2007/12/06 13:40:43 UTC
[jira] Commented: (LUCENE-1052) Add an "termInfosIndexDivisor" to
IndexReader
[ https://issues.apache.org/jira/browse/LUCENE-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12549019 ]
Michael McCandless commented on LUCENE-1052:
--------------------------------------------
I think for 2.3 we should go with the approach as currently committed, and take this ongoing debate into 2.4? I'll mark this as 2.4 target.
> Add an "termInfosIndexDivisor" to IndexReader
> ---------------------------------------------
>
> Key: LUCENE-1052
> URL: https://issues.apache.org/jira/browse/LUCENE-1052
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.2
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.4
>
> 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:
> http://www.gossamer-threads.com/lists/lucene/java-dev/54371
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