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https://issues.apache.org/jira/browse/LUCENE-5303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13803193#comment-13803193
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Michael McCandless commented on LUCENE-5303:
--------------------------------------------
Sorry, I meant BDV (BinaryDocValues) not NDV ...
> OrdinalsCache should use reader.getCoreCacheKey()
> -------------------------------------------------
>
> Key: LUCENE-5303
> URL: https://issues.apache.org/jira/browse/LUCENE-5303
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/facet
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.6, 5.0
>
>
> I'm doing some facet performance tests, and I tried using the
> CachedOrdsCountingFacetsAggregator to cache the decoded ords per doc X field
> ... but noticed it was generating way too many cache entries, because it's
> currently using the NDV instance as the cache key.
> NDV instances are thread-private so this results in way too many entries in
> the cache.
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