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From "Hoss Man (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-475) RAMDirectory(Directory dir, boolean closeDir) constructor uses memory inefficiently.
Date Thu, 01 Dec 2005 18:37:30 GMT
    [ http://issues.apache.org/jira/browse/LUCENE-475?page=comments#action_12359068 ] 

Hoss Man commented on LUCENE-475:
---------------------------------


I'm no expert on File I/O, so i don't know if this is/isn't a good change to make, but i deplore
constants:

If this patch is a good idea, then i'd like to suggest that instead of a static constant for
the buffer size, a new constructor arg be added specifying the buffer size, with the default
(ie: no value, or "0" specified) being to use the old behavior (ie: a buffer the same size
as the file)

>  RAMDirectory(Directory dir, boolean closeDir)  constructor uses memory inefficiently.
> --------------------------------------------------------------------------------------
>
>          Key: LUCENE-475
>          URL: http://issues.apache.org/jira/browse/LUCENE-475
>      Project: Lucene - Java
>         Type: Improvement
>   Components: Store
>     Reporter: Volodymyr Bychkoviak
>  Attachments: RamDirectory.diff
>
> recently I found that  RAMDirectory(Directory dir, boolean closeDir)  constructor uses
memory inefficiently.
> files from source index are read entirely intro memory as single byte array which is
after all is thrown away. And if I want to load my 200M optimized, compound format index to
memory for faster search I should give JVM at least 400Mb memory limit. For larger indexes
this can be an issue.
> I've attached patch how to solve this problem.

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