Making dynamic or static changes to properties

Properties set in the derby.properties file and on the command line of the application that boots Derby are always static, because Derby reads this file and those parameters only at startup.

Only properties set in the following ways have the potential to be dynamic:

As database-wide properties
As system-wide properties via a Properties object in the application in which the Derby engine is embedded

See the "Derby properties" section of the Derby Reference Manual for information about specific properties.