How to limit /var/log/journal size

This Folder /var/log/journal can be too big, people complained about that, because the size of log files can reach 4G, 16 G...

The solution for this is to change file /etc/systemd/journald.conf and setting up the value MaxUse to 512M(MaxUse=512M).

Now Journal have the Max size which 512 Mb.