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https://issues.apache.org/jira/browse/DERBY-5751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-5751:
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Attachment: d5751-1a.diff
Attaching a patch that makes the following changes:
- Use LoopingAlphabetStream and LoopingAlphabetReader instead of
ByteArrayInputStream and CharArrayReader so that the input data
arrays don't need to be materialized in memory.
- Close statements and result sets earlier to allow gc of old
test data.
- Use shared helper methods BaseTestCase.assertEquals(Reader,Reader)
and BaseTestCase.assertEquals(InputStream,InputStream). These also
ensure that the readers and streams are closed.
- Added new helper methods to ByteAlphabet and CharAlphabet to make
it easier to create alphabets consisting of a single value.
Without the patch, TriggerTest fails with an OutOfMemoryError when I
give it 140 MB of heap. With the patch, it completes successfully with
110 MB of heap.
> Make TriggerTest less hungry on heap space
> ------------------------------------------
>
> Key: DERBY-5751
> URL: https://issues.apache.org/jira/browse/DERBY-5751
> Project: Derby
> Issue Type: Improvement
> Components: Test
> Affects Versions: 10.9.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Attachments: d5751-1a.diff
>
>
> TriggerTest.testBlobInTriggerTable() runs some tests with relatively large
> (7MB) LOBs. These LOBs are created by allocating 7MB arrays and wrapping them
> in ByteArrayInputStreams. It would require less memory if it used
> LoopingAlphabetStreams instead.
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