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https://issues.apache.org/jira/browse/SOLR-3585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14037469#comment-14037469
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Ted Sullivan commented on SOLR-3585:
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[~hakeber] - another usage for this patch is to improve performance of
DataImportHandler-initiated updates. The original patch has shown to improve
indexing performance by at least a factor of 2-3. There is no opportunity to
add client-side threads in this situation and since multi-threading support for
DIH was removed, this provides an alternative way to increase throughput with
the DIH.
> processing updates in multiple threads
> --------------------------------------
>
> Key: SOLR-3585
> URL: https://issues.apache.org/jira/browse/SOLR-3585
> Project: Solr
> Issue Type: Improvement
> Components: update
> Affects Versions: 4.0-ALPHA, 5.0
> Reporter: Mikhail Khludnev
> Attachments: SOLR-3585-oome-and-default-tests-chain.patch,
> SOLR-3585.patch, SOLR-3585.patch, SOLR-3585.patch, SOLR-3585.patch,
> SOLR-3585.patch, multithreadupd.patch, report.tar.gz
>
>
> Hello,
> I'd like to contribute update processor which forks many threads which
> concurrently process the stream of commands. It may be beneficial for users
> who streams many docs through single request.
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