Are the database files on a MS Windows filesystem?

There is a long-standing Java issue that memory mapped files on MS Windows do not get freed until the JVM exists.

Various bugs in the OpenJDK bug database such as:

https://bugs.openjdk.org/browse/JDK-4715154

    Andy

On 07/09/2023 13:06, Mikael Pesonen wrote:

We used deleteOld param. The 50 gigs are ghost files that are deleted but not released, that's what I meant by hanging on deleted files. Restarting jena releases them and now for example freed 50 gigs of space.

On 07/09/2023 15.02, Øyvind Gjesdal wrote:
What does the content of the tdb2 folder look like?

I think compact by default never deletes the old data, but you have
parameters for making it delete the old content on completion.

`--deleteOld` can be supplied to the tdb2.tdbcompact command line tool and
`?deleteOld=true` can be supplied to the administration api when calling
compact
https://jena.apache.org/documentation/fuseki2/fuseki-server-protocol.html#compact

You can also delete  the Data-NNNN that isn't the latest one in the
database folder.

Best regards,
Øyvind

On Thu, Sep 7, 2023 at 1:33 PM Mikael Pesonen <[email protected]>
wrote:

After a while 25 gigs of files on data folder becomes 80 gigs of disk
usage because Jena (4.6.1) doen't release files. Same with compact. Is
this fixed in newer versions?


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