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https://issues.apache.org/jira/browse/DERBY-3092?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dyre Tjeldvoll updated DERBY-3092:
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Attachment: xact-concept.diff
Attaching a proof of concept patch a showing the changes. I cannot be committed
in its present form, however, since it doesn't compile with java 1.4. Could
perhaps be fixed with some reflection magic?
> Use java.util.concurrent in TransactionTable and XactFactory to improve
> scalability
> -----------------------------------------------------------------------------------
>
> Key: DERBY-3092
> URL: https://issues.apache.org/jira/browse/DERBY-3092
> Project: Derby
> Issue Type: Improvement
> Components: Performance, Store
> Affects Versions: 10.3.1.4
> Reporter: Dyre Tjeldvoll
> Attachments: xact-concept.diff
>
>
> Running scalability tests with the client and buffer manager from DERBY-2911
> shows that access to the TransactionTable.trans (a Hashtable) and
> XactFactory.tranId (a shared long) are the next major sources of contention.
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