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https://issues.apache.org/jira/browse/LUCENE-3531?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-3531:
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Attachment: LUCENE-3531-identityFix.patch
New patch, now with WeakIdentityHashMap impl from Apache CXF (excluding its
inefficient Collection views and supporting null keys).
I also changed the CachingWrapperFilter to hold soft references to the
DocIdSet, as otherwise e.g. the Bits==null key will never be purged (as the
null key cannot be reclaimed by GC).
We should maybe also change FieldCache to hold soft references to its arrays,
as this makes it more easy to purge them for the GC in low-memory conditions,
even if the reader key is still alive (means field cache can be purged although
reader is still alive).
> Improve CachingWrapperFilter to optionally also cache acceptDocs, if
> identical to liveDocs
> ------------------------------------------------------------------------------------------
>
> Key: LUCENE-3531
> URL: https://issues.apache.org/jira/browse/LUCENE-3531
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/search
> Affects Versions: 4.0
> Reporter: Uwe Schindler
> Assignee: Michael McCandless
> Fix For: 4.0
>
> Attachments: LUCENE-3531-identityFix.patch,
> LUCENE-3531-identityFix.patch, LUCENE-3531-identityFix.patch,
> LUCENE-3531.patch
>
>
> Spinoff from LUCENE-1536: This issue removed the different cache modes
> completely and always applies the acceptDocs using
> BitsFilteredDocIdSet.wrap(), the cache only contains raw DocIdSet without any
> deletions/acceptDocs. For IndexReaders that are seldom reopened, this might
> not be as performant as it could be. If the acceptDocs==IR.liveDocs, those
> DocIdSet could also be cached with liveDocs applied.
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