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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-6119) Add auto-io-throttle to ConcurrentMergeScheduler
Date Tue, 13 Jan 2015 09:02:34 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-6119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14274938#comment-14274938
] 

ASF subversion and git services commented on LUCENE-6119:
---------------------------------------------------------

Commit 1651307 from [~mikemccand] in branch 'dev/trunk'
[ https://svn.apache.org/r1651307 ]

LUCENE-6119: make sure minPauseCheckBytes is set on init of MergeRateLimiter

> Add auto-io-throttle to ConcurrentMergeScheduler
> ------------------------------------------------
>
>                 Key: LUCENE-6119
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6119
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 5.0, Trunk
>
>         Attachments: LUCENE-6119.patch, LUCENE-6119.patch, LUCENE-6119.patch, LUCENE-6119.patch,
LUCENE-6119.patch, LUCENE-6119.patch
>
>
> This method returns number of "incoming" bytes IW has written since it
> was opened, excluding merging.
> It tracks flushed segments, new commits (segments_N), incoming
> files/segments by addIndexes, newly written live docs / doc values
> updates files.
> It's an easy statistic for IW to track and should be useful to help
> applications more intelligently set defaults for IO throttling
> (RateLimiter).
> For example, an application that does hardly any indexing but finally
> triggered a large merge can afford to heavily throttle that large
> merge so it won't interfere with ongoing searches.
> But an application that's causing IW to write new bytes at 50 MB/sec
> must set a correspondingly higher IO throttling otherwise merges will
> clearly fall behind.



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