[jira] [Commented] (LUCENE-6119) Add IndexWriter.getTotalNewBytesWritten

["Michael McCandless (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-6119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14249837#comment-14249837 ] 

Michael McCandless commented on LUCENE-6119:
--------------------------------------------

Thinking about this more ... it may be better to do this entirely inside a FilterDirectory.

E.g. when IndexOutput is closed, and the IOContext is not MERGE, increment the bytes written ... and then that same directory instance could dynamically update the target merge throttling ... maybe.

> Add IndexWriter.getTotalNewBytesWritten
> ---------------------------------------
>
>                 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
>
>
> 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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org