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https://issues.apache.org/jira/browse/JENA-898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14354785#comment-14354785
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Andy Seaborne commented on JENA-898:
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Agreed. Slowing down the tests mkaes things worse.
> Building w/tests on Windows requires a lot of disk space
> --------------------------------------------------------
>
> Key: JENA-898
> URL: https://issues.apache.org/jira/browse/JENA-898
> Project: Apache Jena
> Issue Type: Bug
> Components: TDB
> Affects Versions: Jena 2.12.1, Jena 2.13.0
> Environment: Windows
> Reporter: Stian Soiland-Reyes
>
> mvn clean install
> on Windows, in particular of jena-tdb and jena-jdbc-driver-tdb requires a lot
> of disk space (> 40 GB) as temporary TDB datasets are created per test due to
> the memory mapped files on Windows not being released (JENA-775, JENA-115)
> JENA-897 ensures those files are in target/ when running through Maven, so at
> least they are removed on mvn clean.
> It might be possible to release the ByteBuffers that lock the memory regions
> using System.gc() (which might not help anyway) - but this adds significant
> overhead (~ 1s on my machine) -- perhaps this could be done pr 10 tests in a
> @After if on Windows, as a kind of best-effort clean-up?
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