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https://issues.apache.org/jira/browse/LUCENE-1749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12737217#action_12737217
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Hoss Man commented on LUCENE-1749:
----------------------------------
Mark: thanks for looking into the tests.
If the CustomScoreQuery class(es) push the FieldCache sage into the subReaders
during scoring, then shouldn't the explain methods do the same thing? it
definitely seems like a bug if getting score explanation from a query causes
your memory footprint to double.
Last night i thought over what a more useful API for hte sanity checker would
like like ...
My power is getting turned off for a few hours this afternoon so i'll work on
it them and should have a much cleaner looking patch to post this evening.
(BTW: random thought that occurred to me last night: wouldn't the simplest way
to implement the RamEstimator just be to use vanilla java serialization to a
custom OutputStream that just counted the bytes and sent them to /dev/null) ?
> FieldCache introspection API
> ----------------------------
>
> Key: LUCENE-1749
> URL: https://issues.apache.org/jira/browse/LUCENE-1749
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Hoss Man
> Priority: Minor
> Fix For: 2.9
>
> Attachments: fieldcache-introspection.patch, LUCENE-1749.patch,
> LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch, LUCENE-1749.patch,
> LUCENE-1749.patch
>
>
> FieldCache should expose an Expert level API for runtime introspection of the
> FieldCache to provide info about what is in the FieldCache at any given
> moment. We should also provide utility methods for sanity checking that the
> FieldCache doesn't contain anything "odd"...
> * entries for the same reader/field with different types/parsers
> * entries for the same field/type/parser in a reader and it's subreader(s)
> * etc...
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