Add an "termInfosIndexDivisor" to IndexReader
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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: 2.3
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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