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https://issues.apache.org/jira/browse/LUCENE-8081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16281995#comment-16281995
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ASF subversion and git services commented on LUCENE-8081:
---------------------------------------------------------

Commit 6aece3b999c01de7138f20c59ec0ed0528251022 in lucene-solr's branch 
refs/heads/branch_7x from [~simonw]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=6aece3b ]

LUCENE-8081: Allow IndexWriter to opt out of flushing on indexing threads

Index/Update Threads try to help out flushing pending document buffers to
disk. This change adds an expert setting to opt ouf of this behavior unless
flusing is falling behind.


> Allow IndexWriter to opt out of flushing on indexing threads
> ------------------------------------------------------------
>
>                 Key: LUCENE-8081
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8081
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Simon Willnauer
>            Assignee: Simon Willnauer
>             Fix For: master (8.0), 7.3
>
>         Attachments: LUCENE-8081.patch, LUCENE-8081.patch, LUCENE-8081.patch
>
>
> Today indexing / updating threads always help out flushing. Experts might 
> want indexing threads to only help flushing if flushes are falling behind. 
> Maybe we can allow an expert flag in IWC to opt out of this behavior.



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