[ http://jira.jboss.com/jira/browse/JBAS-332?page=history ]
Scott M Stark reassigned JBAS-332:
----------------------------------
Assign To: Alexey Loubyansky (was: Scott M Stark)
> Read ahead
> ----------
>
> Key: JBAS-332
> URL: http://jira.jboss.com/jira/browse/JBAS-332
> Project: JBoss Application Server
> Type: Bug
> Components: CMP service
> Versions: JBossAS-3.2.6 Final
> Reporter: SourceForge User
> Assignee: Alexey Loubyansky
> Priority: Critical
>
>
> SourceForge Submitter: morphace .
> Hi,
> apparently read-ahead is only working for 1-n
> relationships :-(, not for n-1.
> In my case I used JB3.2b3 but it is the same with 3.0.4.
> My OS: WinXP, JDK 1.4.1_01
> Yes, I have the CMP docs ... ;-)
> Here my standardjbosscmp-jdbc.xml settings:
> <read-ahead>
> <strategy>on-find</strategy>
> <page-size>500</page-size>
> <eager-load-group>*</eager-load-group>
> </read-ahead>
>
> <list-cache-max>1000</list-cache-max>
> I use commit-option B, instance per transaction
> configuration for my CMP EJB's.
> I looked at the code, and (I hope that I am right) it's
> clear that it does not work, because the read-ahead
> mechanism relies on the collection of primary keys (not
> foreign keys).
> I feel, that it could be (easily ;-)) done by
> collecting the foreign keys too and due to the fact
> that the current behavior has grave performance loss I
> submit it as bug.
> Is it okay ?
> TX
> Markus
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