Memory management is not correct when using cgroup v2

$ cat /sys/fs/cgroup/memory/memory.limit_in_bytes
cat: /sys/fs/cgroup/memory/memory.limit_in_bytes: No such file or directory

JAVA_OPTS for memory limit 768Mi
before: `-XX:+ExitOnOutOfMemoryError -XX:MetaspaceSize=32m -XX:MaxMetaspaceSize=96m`
after: `-Xmx384m -XX:+ExitOnOutOfMemoryError -XX:MetaspaceSize=32m -XX:MaxMetaspaceSize=96m`