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https://issues.apache.org/jira/browse/SOLR-14166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17338410#comment-17338410
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Mike Drob commented on SOLR-14166:
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Can you describe (and give some example queries) about what performed much
better/somewhat better/somewhat worse? I'm not looking for full tables, but
just a general idea of what we give up and what we gained.
Do we need to update the ref guide, especially around
[https://solr.apache.org/guide/8_8/common-query-parameters.html#cache-parameter]
?
> Use TwoPhaseIterator for non-cached filter queries
> --------------------------------------------------
>
> Key: SOLR-14166
> URL: https://issues.apache.org/jira/browse/SOLR-14166
> Project: Solr
> Issue Type: Sub-task
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Fix For: main (9.0)
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> "fq" filter queries that have cache=false and which aren't processed as a
> PostFilter (thus either aren't a PostFilter or have a cost < 100) are
> processed in SolrIndexSearcher using a custom Filter thingy which uses a
> cost-ordered series of DocIdSetIterators. This is not TwoPhaseIterator
> aware, and thus the match() method may be called on docs that ideally would
> have been filtered by lower-cost filter queries.
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