[djmakinera]

I tested with 2 Mio and 100k packages.

Still does not answer my question.
1. Exactly how much time do you need to make your process javaw.exe to end?

2. I still do not know how much should be set -Xmx
Perhaps my startup parameters do not allow applications to run properly

"C:\Program Files\Java\jre1.8.0_112\bin\javaw.exe" -Xmx11G -jar C:\Jdownloader2\JDownloader.jar