LUY's building block history feature can grow so large causing the building block history dialog not to open or takes a long time for it to show up. It is possible to limit the number of displayed entries in the dialog.
The full history will still be saved in the database.
Open the file "luy.properties"
Set the limit in the line "max.history.elements="
By default, the value is empty which means no limit is set.
Values between 250 to 500 should be enough for normal use.
Restart your Tomcat