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https://issues.apache.org/jira/browse/LUCENE-6748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14706334#comment-14706334
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ASF subversion and git services commented on LUCENE-6748:
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Commit 1696902 from [~jpountz] in branch 'dev/branches/branch_5x'
[ https://svn.apache.org/r1696902 ]
LUCENE-6748: Never cache MatchAllDocsQuery and other cheap queries.
> The query cache should not cache trivial queries
> ------------------------------------------------
>
> Key: LUCENE-6748
> URL: https://issues.apache.org/jira/browse/LUCENE-6748
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-6748.patch, LUCENE-6748.patch
>
>
> The query cache already avoids caching term queries because they are cheap,
> but it doesn't do it with even cheaper queries like MatchAllDocsQuery.
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