[jira] [Commented] (JENA-755) jena-jdbc-driver-tdb uses a lot of disk space on MSWindows.

["Bruno P. Kinoshita (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/JENA-755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15072272#comment-15072272 ] 

Bruno P. Kinoshita commented on JENA-755:
-----------------------------------------

Assigning to me temporarily as I have access to a Windows box. I will try to reproduce and report it here on the next days.

> jena-jdbc-driver-tdb uses a lot of disk space on MSWindows.
> -----------------------------------------------------------
>
>                 Key: JENA-755
>                 URL: https://issues.apache.org/jira/browse/JENA-755
>             Project: Apache Jena
>          Issue Type: Bug
>          Components: Build
>    Affects Versions: Jena 2.12.0
>            Reporter: Andy Seaborne
>            Assignee: Bruno P. Kinoshita
>
> http://mail-archives.apache.org/mod_mbox/jena-dev/201408.mbox/%3CCAPTxtVOp3aLTGG1Q4qNqnWcLWwvBRw0CRSozrPt_L687obwN1g%40mail.gmail.com%3E
> {quote}
> jena-tdb creates 11.6 GB of test files in "target/tdb-testing/".  There are
> about 100 TDB databases created with most of them weighing in at 192 MB
> each.
> jena-jdbc-driver-tdb creates at least 45 GB of test files in %TEMP%
>  (C:\Users\sallen\AppData\Local\Temp).  There are at least 318 databases
> (192 MB each).  I ran out of disk space at this point (I have a fairly
> small SSD in my laptop), and couldn't actually get it to finish.
> I would think that this is a combination of two issues:
> 1. Sparse files are not used in Windows for the TDB databases (leading to
> the 192 MB databases)
> 2. The JVM bug that does not allow unmapping of memory mapped files until
> the JVM exits means that the unit test databases cannot be deleted at the
> end of each test
> {quote}



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