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