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https://issues.apache.org/jira/browse/LUCENE-7680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15856504#comment-15856504
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David Smiley commented on LUCENE-7680:
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Thanks; for a moment there I confused this with the _old_ TermsFilter now
called {{TermInSetQuery}}. And I am aware of that using a high integer
frequency to avoid caching will nonetheless pollute the cache, which is bad. I
guess it'd be easy to write an implementation that delegates to a
{{UsageTrackingQueryCachingPolicy}}. What do you think about making
{{UsageTrackingQueryCachingPolicy}} non-final so that it could be easily
overridden and minFrequencyToCache might be customized by users?
> Never cache term filters
> ------------------------
>
> Key: LUCENE-7680
> URL: https://issues.apache.org/jira/browse/LUCENE-7680
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-7680.patch
>
>
> Currently we just require term filters to be used a lot in order to cache
> them. Maybe instead we should look into never caching them. This should not
> hurt performance since term filters are plenty fast, and would make other
> filters more likely to be cached since we would not "pollute" the history
> with filters that are not worth caching.
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