lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jason Rutherglen (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1574) PooledSegmentReader, pools SegmentReader underlying byte arrays
Date Wed, 11 Nov 2009 19:02:39 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12776576#action_12776576
] 

Jason Rutherglen commented on LUCENE-1574:
------------------------------------------

A likely optimization for this patch is we'll only pool if the doc count is above a threshold,
100,000 seems like a good number.  Also pooling will be optional.  

> PooledSegmentReader, pools SegmentReader underlying byte arrays
> ---------------------------------------------------------------
>
>                 Key: LUCENE-1574
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1574
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/*
>    Affects Versions: 2.4.1
>            Reporter: Jason Rutherglen
>            Priority: Minor
>             Fix For: 3.1
>
>   Original Estimate: 168h
>  Remaining Estimate: 168h
>
> PooledSegmentReader pools the underlying byte arrays of deleted docs and norms for realtime
search.  It is designed for use with IndexReader.clone which can create many copies of byte
arrays, which are of the same length for a given segment.  When pooled they can be reused
which could save on memory.  
> Do we want to benchmark the memory usage comparison of PooledSegmentReader vs GC?  Many
times GC is enough for these smaller objects.

-- 
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