Same here, i also get lag of fps after 10~min or so, the cpu goes up.
windows 10 pro x64, fx8150 @3.6ghz, gtx660 16gb ram.
java arguments :"-Xmx6G -Xms512M -Xmn768m -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+UseNUMA -XX:+CMSParallelRemarkEnabled...