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https://issues.apache.org/jira/browse/DERBY-6798?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rick Hillegas updated DERBY-6798:
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Urgency: Normal (was: Blocker)
> Forward only ResultSet doesn't release passed rows for GC
> ---------------------------------------------------------
>
> Key: DERBY-6798
> URL: https://issues.apache.org/jira/browse/DERBY-6798
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.11.1.1
> Environment: MAC OSX 10.9.5
> Reporter: Liam Sharp
> Priority: Critical
> Labels: easytest
> Attachments: ResultSetTest.java
>
>
> I'd like to iterate over a ResultSet that is larger than the amount of memory
> available to my application. I thought this would be possible with a
> ResultSet.TYPE_FORWARD_ONLY but memory usage appears to increase as I loop
> through the results and not be GC'd. Is my understanding correct? I've tried
> this using the H2 database and it appears to do this.
> I've attached a sample program to illustrate this. It creates a large table
> then iterates over it logging out the memory usage as it goes. There is a
> pause at the end of the iteration to allow the user to attach a debugger
> (such as jvisualvm) to inspect memory usage and request GC.
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