@Student im ersten Jahr: JVM will not free any memory when you don't tell (via JVM Parameter) that it should. explained here,
https://board.jdownloader.org/showpo...86&postcount=9
IDLE doesn't mean that no memory is required!
Your use of JDownloader is far far far away from *normal* usage, so get yourself together and start reading/learning yourself and not wasting time of support again and again.