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https://issues.apache.org/jira/browse/LUCENE-4472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer updated LUCENE-4472:
------------------------------------

    Attachment: LUCENE-4472.patch

I played around with this and sketched out how this could look like. I don't 
think we should entirely break BW compat but open up the context like I did in 
the patch. There are still edges in the patch but some initial feedback would 
be great.
                
> Add setting that prevents merging on updateDocument
> ---------------------------------------------------
>
>                 Key: LUCENE-4472
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4472
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/index
>    Affects Versions: 4.0
>            Reporter: Simon Willnauer
>             Fix For: 4.1, 5.0
>
>         Attachments: LUCENE-4472.patch, LUCENE-4472.patch
>
>
> Currently we always call maybeMerge if a segment was flushed after 
> updateDocument. Some apps and in particular ElasticSearch uses some hacky 
> workarounds to disable that ie for merge throttling. It should be easier to 
> enable this kind of behavior. 

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