lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eks Dev (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1741) Make MMapDirectory.MAX_BBUF user configureable to support chunking the index files in smaller parts
Date Mon, 13 Jul 2009 22:32:14 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730560#action_12730560
] 

Eks Dev commented on LUCENE-1741:
---------------------------------

Uwe, you convinced me, I looked at the code, and indeed, no performance penalty for this.


what helped me  was 1.1G... (I've tried to find maximum); Max file size is 1.4G ... but 1.1
is just OS coincidence, no magic about it. 

I guess 512mb makes a good value, if memory is so fragmented that you cannot allocate 0.5G,
you are definitely having some other problems around. We are taliking here about VM memory,
and even on windows having 512Mb in block is not an issue (or better said, I have never seen
problems with this value).

@Paul: It is misunderstanding, my "algorithm" was meant to be manual... no catching OOM and
retry (I've burned my fingers already on catching RuntimeException, do only when absolutely
desperate :). Uwe made this value user settable anyhow.  

Thanks Uwe!

  
   

> Make MMapDirectory.MAX_BBUF user configureable to support chunking the index files in
smaller parts
> ---------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-1741
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1741
>             Project: Lucene - Java
>          Issue Type: Improvement
>    Affects Versions: 2.9
>            Reporter: Uwe Schindler
>            Assignee: Uwe Schindler
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: LUCENE-1741.patch, LUCENE-1741.patch
>
>
> This is a followup for java-user thred: http://www.lucidimagination.com/search/document/9ba9137bb5d8cb78/oom_with_2_9#9bf3b5b8f3b1fb9b
> It is easy to implement, just add a setter method for this parameter to MMapDir.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


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


Mime
View raw message