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From "Kathey Marsden (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-262) Use Java 1.5 NIO for improved performance
Date Mon, 02 Mar 2009 16:26:56 GMT

    [ https://issues.apache.org/jira/browse/DERBY-262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678031#action_12678031
] 

Kathey Marsden commented on DERBY-262:
--------------------------------------

There was some discussion on this topic in the following thread on derby-user.
http://www.nabble.com/Derby-speedup-by-not-using-page-caches--tt22268815.html


> Use Java 1.5 NIO for improved performance
> -----------------------------------------
>
>                 Key: DERBY-262
>                 URL: https://issues.apache.org/jira/browse/DERBY-262
>             Project: Derby
>          Issue Type: Wish
>          Components: Performance
>            Reporter: Eric Solberg
>
> Are there plans to take advantage of JDK 1.5 NIO in Derby?  This should give a substantial
performance benefit.  In a simple test, processing extremely large PDF files (80+MB) into
individual pages, I saw 3x-4x performance improvement using memory mapped files.  This was
without doing anything 'smart' to squeeze out even more performance.  

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