[jira] [Updated] (LUCENE-3924) Optimize buffer size handling in RAMDirectory to make it more GC friendly

["David Smiley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-3924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

David Smiley updated LUCENE-3924:
---------------------------------

    Fix Version/s:     (was: 4.7)
                   4.8

> Optimize buffer size handling in RAMDirectory to make it more GC friendly
> -------------------------------------------------------------------------
>
>                 Key: LUCENE-3924
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3924
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: core/store
>    Affects Versions: 4.0-ALPHA
>            Reporter: Uwe Schindler
>            Assignee: Uwe Schindler
>             Fix For: 4.8
>
>
> RAMDirectory currently uses a fixed buffer size of 1024 bytes to allocate memory. This is very wasteful for large indexes. Improvements may be:
> - per file buffer sizes based on IOContext and maximum segment size
> - allocate only one buffer for files that are copied from another directory
> - dynamically increae buffer size when files grow (makes seek() complicated)



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