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https://issues.apache.org/jira/browse/SOLR-3715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13437085#comment-13437085
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Yonik Seeley commented on SOLR-3715:
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It looks like there's a bug lurking here.... I'm looking into it.
http://find.searchhub.org/document/7510cdb2423bcf7d
> improve tlog concurrency
> ------------------------
>
> Key: SOLR-3715
> URL: https://issues.apache.org/jira/browse/SOLR-3715
> Project: Solr
> Issue Type: Improvement
> Reporter: Yonik Seeley
> Assignee: Yonik Seeley
> Attachments: SOLR-3715.patch
>
>
> Right now log record serialization is synchronized. We can improve
> concurrency by serializing to a ram buffer outside synchronization. The cost
> will be RAM usage for buffering, and more complex concurrency in the tlog
> itself (i.e. we must ensure that a close does not happen without flushing all
> in-RAM buffers)
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