Dear Harri, I don't check it yet, but is -XX:+UseContainerSupport a requirement for this?? >root at c526096eb86e:/# java -XX:MaxRAMPercentage=20.0 -XX:MinRAMPercentage=10.0 -XX:+PrintFlagsFinal - >root at debian10:~# java -XX:MaxRAMPercentage=20.0 -XX:MinRAMPercentage=10.0 -XX:+PrintFlagsFinal -version Greetings Guido