Querying VG on large Postgres DB uses lots of memory

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And that memory is not freed when the query completes.

I am running a CONSTRUCT using a Postgres VG on a Mac. My system has 32G memory. Nothing else is running except Studio and TextMate.

The available memory (as shown by MemClean2) goes down to 3.5G!! When the query completed and even after I closed Studio, memory was still at 4.5G. When I did a stardog-admin server stop, available memory jumped to 22.3G!

What can I do to force the server to free up its memory? I have STARDOG_SERVER_JAVA_ARGS='-Xmx12g -Xms12g -XX:MaxDirectMemorySize=12g'.

Any suggestions?

Andrea

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