[
https://issues.apache.org/jira/browse/LUCENE-4462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13473069#comment-13473069
]
Simon Willnauer commented on LUCENE-4462:
-----------------------------------------
Committed to trunk in revision 1396500
> Publishing flushed segments is single threaded and too costly
> -------------------------------------------------------------
>
> Key: LUCENE-4462
> URL: https://issues.apache.org/jira/browse/LUCENE-4462
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/index
> Affects Versions: 4.0-ALPHA, 4.0-BETA, 4.0
> Reporter: Michael McCandless
> Assignee: Simon Willnauer
> Fix For: 4.1, 5.0
>
> Attachments: LUCENE-4462.patch, LUCENE-4462.patch
>
>
> Spinoff from http://lucene.markmail.org/thread/4li6bbomru35qn7w
> The new TestBagOfPostings failed the build because it timed out after 2 hours
> ... but in digging I found that it was a starvation issue: the 4 threads were
> flushing segments much faster than the 1 thread could publish them.
> I think this is because publishing segments
> (DocumentsWriter.publishFlushedSegment) is actually rather costly (creates
> CFS file if necessary, writes .si, etc.).
> I committed a workaround for now, to prevent starvation (see svn diff -c
> 1394704 https://svn.apache.org/repos/asf/lucene/dev/trunk), but we really
> should address the root cause by moving these costly ops into flush() so that
> publishing is a low cost operation.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org
For additional commands, e-mail: dev-h...@lucene.apache.org
