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https://issues.apache.org/jira/browse/LUCENE-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13020206#comment-13020206
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Simon Willnauer commented on LUCENE-2571:
-----------------------------------------
bq. Would you consider trying other MergePolicy objects on trunk? The
BalancedSegment MP tries to avoid these long stoppages.
I think there is a misunderstanding on your side. The long stoppages on trunk
are not due to merges at all. They are due to flushing the DocumentsWriter
which essentially means stop the world. This is why we can not make any
progress. Merges are NOT blocking indexing on trunk no matter which MP you use.
The Balanced MP is rather suited for RT environments to make reopening the
reader quicker.
you should maybe look at this blog entry for a more complete explanation:
http://blog.jteam.nl/2011/04/01/gimme-all-resources-you-have-i-can-use-them/
> Indexing performance tests with realtime branch
> -----------------------------------------------
>
> Key: LUCENE-2571
> URL: https://issues.apache.org/jira/browse/LUCENE-2571
> Project: Lucene - Java
> Issue Type: Task
> Components: Index
> Reporter: Michael Busch
> Priority: Minor
> Fix For: Realtime Branch
>
> Attachments: wikimedium.realtime.Standard.nd10M_dps.png,
> wikimedium.realtime.Standard.nd10M_dps_addDocuments.png,
> wikimedium.realtime.Standard.nd10M_dps_addDocuments_flush.png,
> wikimedium.trunk.Standard.nd10M_dps.png,
> wikimedium.trunk.Standard.nd10M_dps_addDocuments.png
>
>
> We should run indexing performance tests with the DWPT changes and compare to
> trunk.
> We need to test both single-threaded and multi-threaded performance.
> NOTE: flush by RAM isn't implemented just yet, so either we wait with the
> tests or flush by doc count.
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